Chemical Reactivity Compatibility Awareness - Oct 2, 2012

by Maren Zimmermann

Chemical Reactivity and Compatibility Awareness Session.

Vaudreuil –Dorion Safety Office – Lunch and Learn SessionsSeptember Oct 2, 2012 – 12 to 1:00 p.m. Simon Daigle

Commitment makes the best chemistry.

Table of contents:1. HSE Corporate

2. Vaudreuil-Dorion Plant Policy

3. Quebec OHS Act and Regulations

4. Definitions, Concepts, Stats

5. Chemical reactions

6. Chemical incompatibilities

7. Chemical segregation and storage

8. Examples

Chemical Reactivity and Compatibility



SCOPE: Awareness of risks and hazards of various chemical reactions, chemical storage incompatibilities, chemical segregation, means of chemical containment, hierarchy of controls (Process Safety Engineering) and employee protection and incident prevention via chemical reactivity awareness.

PURPOSE: Increase safety prevention and awareness of chemical reactions and incompatibilities, proper chemical segregation, use and compliance

OBJECTIVE: Delivery of safety awareness content through general presentation using power point visuals and question / discussion period. 60 minutes


1. HSE Corporate Requirements:Laboratory Safety Standard and Chemical Hygiene Plan

Covers the following sections for Chemical Reactivity and Compatibility

Section 9.8: Flammable Chemicals and Storage

Section 9.9: Reactive Chemicals

Section 9.10: Corrosive Chemicals




Section 9.8: Flammable Chemicals and Storage:

Flammable Chemicals and Storage: Chemicals are generally classified as “flammable”, due to their relatively low “flashpoint”. Flashpoint is defined as the temperature at which a materials yields vapor of significant quantity that flame will occur in the presence of an ignition source. In the laboratory, flammable liquids are those with a “flashpoint” Below 100°F; flash points below 140°F are considered combustibles.

Storage of Flammable Chemicals: Flammable liquids should not be stored near heat, ignition sources, powerful oxidizing agents, or other reactive chemicals. Flammable liquids should not be stored near an exit, stairway, or any area normally used for the safe egress of people. Storage in glass bottles should be avoided if possible. If glass must be used, the bottle should be protected against breakage.



Storage of Flammable Chemicals: Flammable liquids should not be stored near heat, ignition sources, powerful oxidizing agents, or other reactive chemicals. Flammable liquids should not be stored near an exit, stairway, or any area normally used for the safe egress of people. Storage in glass bottles should be avoided if possible. If glass must be used, the bottle should be protected against breakage.

Section 9.9

Reactive Chemicals: Reactive chemicals (water reactive, air reactive, or unstable in nature), must be handled with extreme care. MSDS sheets should be carefully reviewed to verify safe handling procedures for specific chemicals/compounds. Laboratory work involving reactive chemicals should be stored such that proper compatibility is insured and conditions such as temperature and sunlight are maintained within safe limits for each specific type of chemical. Refrigerators used for storing flammable or reactive chemicals should be explosion proof. Standard Operating Procedures (SOPs) must be created and reviewed specific to reactive chemicals and processes.



Section 9.10

Corrosive Chemicals: Corrosive materials present a hazard due to their ability to damage human tissue. Although the exact definition of corrosive varies slightly between regulatory agencies, all definitions are closely tied to pH. (OSHA defined corrosive material by a chemical’s ability to cause destruction of, or irreversible alterations in, living tissue by chemical action at the site of contact.) The pH value of a substance represents the acidity or alkalinity of a solution Acidic materials and alkaline materials should be segregated in storage to prevent reaction from occurring.

Additionally, use dilute acidic or alkaline solutions instead of concentrated solutions for adjusting the pH of reagents and other solutions made in the laboratory whenever possible.



10. CHEMICAL WASTE MANAGEMENT:

Section 10.2 .2

Containers: Separate containers must be used for different categories of chemical wastes and the container must be compatible with the waste contained. Only compatible chemicals shall be combined in a container. Any chemicals spilled on the outside of the container must be immediately cleaned off. All containers and tanks used to store hazardous waste must be in good condition, free from damage, cracks, or corrosion, sealed when not in use, show no signs of leakage, and be easily accessible.


2. Vaudreuil-Dorion Plant Policy: (Process Safety)Reference: FSP 9 – Hazard Assessment (Sample Questions) ?

1. Has an evaluation of possible uncontrolled reaction or decomposition been made?

2. What precautions are necessary for flammable materials?

3. What materials are highly toxic?

4. What has been done to assure that materials of construction are compatible with the chemical process materials that are involved?

5. What maintenance control is necessary to ensure replacement of proper materials, e.g., to avoid excessive corrosion, to avoid producing hazardous compounds with reactants?

6. What precautions need to be considered relative to stability of all materials in storage?

7. How are potentially hazardous reactions isolated – product incompatibilities?

8. What unwanted hazardous reactions can be developed through unlikely flow or process conditions or through contamination?

9. What precautions are taken for processes operating near or inside the flammable limits?



3. Quebec OHS Act and Regulations:

© Éditeur officiel du Québec

Updated to 1 September 2012This document has official status.

c. S-2.1, r. 13

Regulation respecting occupational health and safety

An Act respecting occupational health and safety




DIVISION X

STORAGE AND HANDLING OF DANGEROUS SUBSTANCES

§1. Interpretation and general provisions

70. Dangerous substances: In this Division, “dangerous substance” means a substance that is either a controlled product or a substance that appears on the list in Schedule II and that belongs to one of the following categories:

(1)compressed gases;

(2) flammable and combustible substances;

(3) combustive substances;

(4) toxic substances;

(5) corrosive substances;

(6) dangerously reactive substances.


DEFINITIONS:

(1)compressed gases;

(2) flammable and combustible substances;

(3) combustive substances;



DEFINITIONS:

(4) toxic substances;

(5) corrosive substances;

(6) dangerously reactive substances.



71. Controlled product: In this Division, “controlled product” means a product controlled within the meaning of the Regulation respecting information on controlled products (c. S-2.1, r. 8).

A dangerous substance that is both a controlled product and one appearing on the list in Schedule II shall meet the requirements of this section applying to it, as regards each and every category to which it belongs both as a controlled product and a substance appearing on the list.



72. Safety precautions: The storage and handling of dangerous substances shall be so controlled as to prevent accidental spillage or lighting of these substances. The following precautions shall be taken:

(1) separate or isolate any dangerous substances which when mixed with other substances, may cause a fire or an explosion, or may discharge flammable or toxic gases;

(2) keep containers, piping and other apparatus in good working order;

(3) clean immediately but safely any dangerous substance spilled on floors or shelves;

(4) when pouring from one container to another, use a secure recipient taking into account the type of dangerous substance being poured;

(5) depending on the category in which the dangerous substance is classified, it shall comply with sections 77 to 99.

.



73. Monitoring devices: The devices for monitoring any open recipient containing liquid state dangerous substances at temperatures in excess of 60 °C shall be isolated or equipped with screens in order to protect workers from splashes if such substances are agitated or heated.

74. Level indicators: Level indicators on reservoirs, vats or other containers with liquid state dangerous substances at temperatures in excess of 60 °C shall be provided with protective screens.



75. Emergency equipment: Emergency showers and eye wash fountains shall be put at the disposal of workers in the following circumstances:

(1) when a corrosive substance or other dangerous substance is likely to rapidly cause serious or irreversible damage to the skin or eyes of workers;

(2) when a toxic substance is likely to be rapidly absorbed by the skin or the eyes and cause them to have serious irritations.

In other cases, equipment for rinsing eyes and washing skin, such as showers, portable showers, eye wash fountains or any other type of plumbing shall be put at the disposal of workers, according to the nature of the dangers to which they are exposed. Such equipment shall be located near the work station of the exposed workers.



76. Shower facilities: Emergency showers and eye wash fountains referred to in the first paragraph of section 75 shall be clearly identified and easily accessible. In addition, they shall be located within the immediate vicinity of exposed workers and supplied with warm water.

Water from showers supplied by a drinking water network as well as water supplying portable showers shall be regularly changed to ensure its safety.

The warm water supply only applies to showers installed or modified on or after 2 August 2002.



77. Compressed gas cylinders: All compressed gas cylinders shall:

(1) comply with the Act respecting pressure vessels (R.S.Q., s. A-20.01) and its regulations;

(2) be kept away from any source of heat and not be exposed to temperatures in excess of 50 °C;

(3) be used only for the purposes for which they were designed;

(4) be handled in such a manner as not to damage them, and be fastened upright or held in a cart when in use;

(5) be kept in an upright position with the valves facing upwards and be solidly held in place;

(6) be equipped with a protective cap for the valves when not connected for use.



78. Compressed gas cylinders in series: Compressed gas cylinders linked in a series via a collector shall be supported, held together and form a unit by means of a rack or other frame designed for such purpose, and the cocks and safety valves shall be protected from being accidentally bumped or knocked.

79. Prohibition: The protective cap or a valve collar shall not be used for raising a compressed gas cylinder unless the collar has been specifically designed for such purpose.



80. Propane gas: Any propane gas cylinder that is not connected for use shall be stored in accordance with the Propane Installation Code, CAN/CGA B149.2-M91.

Non-reusable propane gas cylinders shall also be stored in compliance with paragraph 9.5.6 of that Code.

§3. Flammable and combustible substances

81. Storage: Flammable and combustible substances shall be stored:

(1) away from areas with a high fire hazard;

(2) away from combustive substances or powerful oxidizing agents.



82. Liquid state flammables and combustibles: The storage, handling and use of liquid state flammables and combustibles shall be carried out in accordance with NFPA Standard 30-1996 Flammable and Combustible Liquids Code.

In the case of buildings in existence on 2 August 2001, the employer may, however, take precautions that ensure a level of safety equivalent to that prescribed in that standard.

83. Gaseous state flammable substances: Gaseous state flammable substances such as ammonia gas, hydrogen, acetylene and hydrogen sulfide shall never be stored with combustive substances or with oxidizing agents in a gaseous state such as chlorine, fluorine, nitrogen dioxide, nitrous oxides, nitrogen tetroxide, oxygen or compressed air.



84. Reactive substances flammable in contact with air: Reactive substances that are flammable in contact with air to the point of being able to burn shall be kept either:

(1) under an inert liquid;

(2) in an inert atmosphere;

(3) in air-tight containers.

85. Reactive substances flammable in contact with water: Reactive substances that are flammable in contact with water shall be stored:

(1) in closed containers;

(2) away from sources of humidity;

(3) away from plumbing with condensation or drippings.



§4. Combustive substances

86. Interpretation: For the purposes of sections 87 to 91, powerful oxidizing agents such as chlorine and fluorine are considered to be combustive substances.

87. Storage: Combustive substances shall be stored away from substances with which they may react and especially from the following substances:

(1) a corrosive substance with which they may react by exploding;

(2) an inflammable or combustible substance with which they may react violently;

(3) a toxic substance;

(4) a reducing agent, especially a metallic powder;

(5) a substance which oxidizes easily, including wood surfaces.



88. Containers for combustive substances: Containers having combustive substances shall:

(1) be stored closed;

(2) have their content clearly identified;

(3) be kept in cool, dry places.

89. Gaseous state combustive substances: Gaseous state combustive substances shall never be stored with gaseous state flammable substances.

90. Ground: Equipment, including machines, used for processing or handling combustive substances such as organic peroxides, nitrates and chlorates shall be grounded.



91. Contaminated clothing: Clothing contaminated by combustive substances shall be removed immediately and washed before being worn again.

§5. Toxic substances

92. Storage: Toxic substances shall be stored:

(1) away from areas of high fire hazard and from heat sources;

(2) away from combustive substances and powerful oxidizing agents;

(3) in cool and well-ventilated areas.

93. Overflow prevention devices: Reservoirs and vats containing liquid state toxic substances shall be equipped with overflow prevention devices. Level indicators on such open reservoirs and vats shall be provided with protective screens.



94. Identification of cylinders: Any cylinder containing a gaseous state toxic substance shall be clearly identified.

95. Posting warnings: A warning indicating the type of danger shall be posted at all entrances where a gaseous state toxic substance is stored.

6. Corrosive substances

96. Storage: Corrosive substances shall be stored:

(1) away from areas with a high fire hazard;

(2) away from combustive substances and powerful oxidizing agents;

(3) protected against direct sun rays;

(4) in cool and well-ventilated areas.

• In addition, corrosive acid substances shall be stored away from corrosive antacid substances.



97. Containers for corrosive substances: Containers for corrosive substances shall:

(1) be kept closed;

(2) have their content clearly identified;

(3) be handled with care.

98. Protection from splashes: Open reservoirs and vats in which liquid-state corrosive substances are agitated with compressed air or steam heated shall be protected so that workers are not exposed to splashes.

99. Overflow prevention devices: Reservoirs and vats containing liquid state corrosive substances shall be equipped with an overflow prevention device. Level indicators on such reservoirs and vats shall be provided with protective screens.



§7. Dangerously reactive substances

100. Storage: Dangerously reactive substances and substances that could trigger a violent polymerization, decomposition or condensation reaction due to vibrations, light or sound waves shall be stored separately, well protected and stabilized, as the case may be. O.C. 885-2001, s. 100.



Schedule II – List of Dangerous Substances by Category:

Categories if dangerous substances: Example

--------------------------------------------------------------------------------Dangerous inflammables oxidants toxic corrosives dangerously

substances and combustibles reactive

----------------------------------------------------------------------------------------------------------

Acetates, organic x

-----------------------------------------------------------------------------------------------------------

Acids, mineral x

(concentrated)

-----------------------------------------------------------------------------------------------------------

Acids, organic x

--------------------------------------------------------------------------------

Activated charcoal x

--------------------------------------------------------------------------------

Air, compressed x

--------------------------------------------------------------------------------

Alcohols x

--------------------------------------------------------------------------------

Aldehydes x

--------------------------------------------------------------------------------

Alkali metals x



4. Definitions, Concepts, Stats:

CSB Chemical Safety Board

Quebec OHS Regs

NFPA 704



Chemical Safety Board (CSB): 167 incident investigatedIncidents as function of Industry Profile by incident (Top: chemical manufactur)

70 % in chemical Industry



Chemical Safety Board (CSB) Database: Incidents





CSB Investigations: nearly 75 % are known causes



CSB Reactive Hazard Investigations: 167 incidents investigated

Data analysis: 3 common types of reactive hazardsA. Chemical incompatibility (36% of incidents)

B. Runaway reaction (35% runaway reactions)

C. Impact or thermally sensitive materials (10% of incidents)

*The hazard is unknown for 19% of incidents investigated.

Incident causalities:* Causal data for 37 of the 167 incident investigated was ascertained

* More than 60% of reactive incidents involved inadequate management

systems for identifying or evaluating hazards

* Nearly 50% of the causal data also point to inadequate procedures for the safe

storage, handling or processing of chemicals

* Nearly 50 % of 167 incidents affected the public

* Over 50% of the 167 incident involved chemicals not covered by the OSHA

regulator or EPA process safety regulations in 2022 [Ref. 3].



CSB Reactive Hazard Investigations: 167 incidents investigated

Other useful information:

* Nearly 50 % of 167 incidents affected the public

* Over 50% of the 167 incident involved chemicals not covered by the OSHA

regulator or EPA process safety regulations in 2022 [Ref. 3].

* Approximately 60% of the 167 chemical incidents involved substances that

either are not rated by NFPA or have “no special hazard” (NFPA: “0”.

* Only 10% of the 167 incidents involved chemicals with NFPA of rating of 3 or 4.







NFPA 704 Diamond

WOXWOX

0334


Special Hazards

InstabilityToxicity

Flammability




NFPA 704 DIAMOND DOES NOT COVER ADEQUATELY REACTIONS INFORMATION FOR SAFETY PRACTICES IN TERMS OF PROCESS SAFETY.

HOWEVER, ADEQUATELY COVERS INSTABILITY AND STABILITY CONDITIONS.



5. Chemical reactions: definitions

Acid-base reaction: chemical reaction involving the transfer of a hydrogen ion from an acidic substance to a basic substance.

Chemical incompatibility: type of reactive hazard that occurs when a chemical is mixed or comes in contact with other chemicals, or process materials, resulting in an incontrolled and often violent reaction.

Chemical reaction: interaction of substances in which they undergo change of comnposition and properties due to changes in molecular structure of the constituent atoms or molecular fragments.

Decomposition: chemical reaction that leads to the breakdown or decomposition of a chemical into smaller molecules or elements, often with the liberation of energy and product gases.

Water reactive: substance that reacts with water and producing a vigorous exothermic reaction.



5. Chemical reactions: definitionsExothermic reaction (heat producing): chemical reaction that liberates heat.

Endothermic reaction (heat consuming): chemical reaction that absorbs heat.

Oxidation: chemical reaction in which the oxidation state of a molecule increases due to the abstraction of electrons; ofter occurs when oxygen or other oxidizing materails combines with the reacting substance.

Oxidation-Reduction (REDOX): Chemical reaction in which an element loses (oxidation) or gains (reduction) an electron.

Polymerization: Chemical reaction in which one or more relatively simple molecules (monomers) combine to form a more complex compound (polymer).

Reactivity: Tendency of a substance to undergo chemical change.



5. Chemical reactions: definitions

Runaway reaction: a reaction that is out of control because the heat generation rate exceeds the rate at which heat is removed to cooling media and surroundings.



Inherently Safer Strategies

• MINIMIZE

• SUBSTITUTE

• MODERATE

• SIMPLIFY


CCPS Definitions:

Increasing the safety and security within the chemical supply chain has been a concern of the US government for several years. Both the Environmental Protection Agency (EPA) and the Department of Homeland Security (DHS) have active efforts to reduce societal risk of a toxic industrial chemical release. As part of this, inherently safer technology (IST) has been proffered as a potential solution for addressing a number of these safety and security shortfalls. Indeed, IST concepts have been used successfully and, when coupled with other safer design strategies, offers valid solutions in improving both safety and security and reducing societal risk. Before any solution (IST or other) can be employed, the underlying science must be fully understood and characterized. This presentation will focus on the efforts by DHS' Chemical Security Analysis Center to evaluate the underlying scientific groundwork so that IST and safer design strategies in general may be applied in a broader context to improve the security of the chemical supply chain.



Ideas: About inherently safer technology (IST)

Risk Reduction Strategies: (Hierarchy of Controls)

Consequences can be reduced by:

1. Substitution – use less hazardous substances

2. Minimization – Reduce the quantity of toxic materials used or stored

The vulnerability can be reduced by

1. Attenuate – use milder conditions

2. Simplify- Design process to minimize the possibility of human error

or equipment failure



WHY?

Those hazards that are not eliminated or reduced to insignificance must be managed throughout the lifetime of the facility,

to avoid uncontrolled chemical reactions that can result directly or indirectly in serious harm to people, property or the environment.




Foresee, Avoid, Control

• Anticipate chemical reactivity hazards• Identify all reactive materials and

all possible reactive interactions

• Do whatever it takes to fully understand intended and unintended reactions– Boundaries of safe operation– Calculations, literature, testing, experts

• Design and operate to avoid unintended reactions and control intended reactions



Concepts of IST: (Applying science and engineering to Risk Reduction) CCPS Gold Book.

Inherent safety is a concept, an approach to safety that focuses on eliminating or reducing the hazards associated with a set of conditions

The stated goal is to eliminate or reduce the hazards associated with a set of conditions, not just material or consequences. This definition recognizes that hazards are not the result of a single material property and therefore there is not necessarily a singular solution.

About inherently safer technology (IST)


DEFINING IST – New Jerseys Toxic Catastrophe Prevention Act Program:

IST means the principles or techniques incorporated in a newly designed and constructed covered process to minimize or eliminate the potential for an extraordinary hazardous accident

•Applies to sites that handle, use, manufacture or store extraordinarily hazardous substances (EHS)•Address first order IST and vulnerability•EHS is defined as a substance which produces a significant likelihood that a persons exposed will suffer acute health effects resulting in death or permanent disability•No quantitative value or limit is placed on the toxicity or quantity of the substance



6. Chemical incompatibilities:

EXAMPLE:

Water Treatment Chemicals







Source: EPA 816-F-09-00.









7. Chemical segregation and storage:

EXAMPLE




Chemical Safety Compatibility Analysis CHP Chemical Hygiene Plan

ACTIONS Section 1 Section 3 - Hazardous Ingredients

Item Product Composite name CAS % weight per weight (wt/wt)

SEGREGATE A 1 Eclipse 803 Ferric Sulphate 10028-22-5 40-70

SEGRAGATE A 2 Bulab 8893 Citric acid 77-92-9 7-13

Hydrochloric acid 7647-01-0 1-5

Acrylamide-Acrylic acide polymer 25987-30-8 3-7

SEGRAGATE B 3 Eclipse 300 Sodium metabisulfite 7681-57-4 15-40

SEGREGATE B 4 Eclipse 310 (1-Hydroxyethylidene) diphosphonic acid 2809-21-4 5-10

Sodium hydroxide 1310-73-2 1-5

EDTA 64-02-8 0.5-1.5SEGRAGATE B 5 Eclipse 432 Cyclohexalamine 108-91-8 15-40

Morpholine 110-91-8 7-13

SEGRAGATE C 6 Eclipse 471 Diethylhydroxylamine 3710-84-7 15-40

SEGREGATE B 7 Eclipse 472 Cyclohexylamine 108-91-8 30-60

Morpholine 110-91-8 7-13

2-(Diethylamino)ethanol 100-37-8 10-30

N,N-Diethylhydroxylamine 3710-84-7 5-10SEGRAGATE A 8 Hydrochloric acid 20 be HCL 764-701-0 30-35

SEGRAGATE C9 Eclipse 509 Sodium molybdate 7631-95-0 5-10

Sodium metaborate 7775-19-1 1-5SEGRAGATE C 10 Bulab 8884 Sodium hydroxide 1310-73-2 1-5

Tetrasodium salt of ethylene diamine tetraacetic acid 64-02-8 1-5

SEGRAGATE B 11 Busperse 2011 Sodium hydroxide 1310-73-2 10-30

Tetrasodium salt of ethylene diamine tetraacetic acid 64-02-8 0.5-1.5

Diethylene glycol monoethyl ether 111-90-0 1-5

Sodium laureth sulfate 9004-82-4 5-10SEGRAGATE B 12 Eclipse 391 Sodium hydroxide 1310-73-2 30-60



Section 4 - Physical Data

State pH (Mixture) Definition Solubility in water Evaporation Rate Vapor pressure

Liquide < 2 STRONG ACID Completely soluble in H2O. Not available (water =1) N/A

Liquide 8 SLIGHTLY BASIC Completely soluble in H2O. Not available (water =1) N/A

Liquide 5.6 SLIGHTLY ACIDIC Slightly soluble in H2O. Not available (water =1) N/A

Liquide 10-11 STRONG CAUSTIC (BASE) Completely soluble in H2O. < 1 (Water=1) N/A

Liquide 11-13 STRONG CAUSTIC (BASE) Soluble in H2O. < 1 (Water=1) N/A

Liquide Not available. UNKNOWN Soluble in H2O. Not available (water =1) N/A

Liquide > 12.5 STRONG CAUSTIC (BASE) Soluble in H2O. Not available (water =1) N/A

Liquide < 1.5 STRONG ACID Easily soluble in H2O. Not available. 25 (mmHg @20C)

Liquide 10.5-11.5 STRONG CAUSTIC (BASE) Completely soluble in waterNot available (water =1)

N/A

Liquide >12 STRONG CAUSTIC (BASE) Soluble in water. Not available (water =1) N/A

Liquide >12 STRONG CAUSTIC (BASE) Miscible in water. Not available (water =1) N/A

Liquide 13-14 STRONG CAUSTIC (BASE) Completely soluble in H2O. 0.360.2 kPa @20C



Section 5 - Fire and Explosion Hazards

Flash Point LEL UEL

Not flammable N/A N/A




Lquid can burn upon heating at or above flash point (57 C)

N/A N/A


N/A N/A


N/A N/A

N/A. N/A N/A






Chemical Reactivity and CompatibilitySection 6 - Reactivity Chemical Stability Conditions of unstability Incompatibilities (MSDS Information)

Strong bases, alkalis, mineral acids and metals (copper and steel). Stable under normal conditions, Use and Storage Excessive heat.

Strong bases, strong oxidizers, reducing agents, organic materials and metals. Stable under normal conditions, Use and Storage None known.

Strong acids, strong oxidizers. Stable under normal conditions, Use and Storage None known.

Strong acids, strong oxidizers, and metals. Stable under normal conditions, Use and Storage None known. Strong acids, strong oxidizing agents. Stable under normal conditions, Use and Storage Extreme heat, open flames and sparks

Strong oxidizers, activiated carbon and sulfonyl chlorides Stable under normal conditions, Use and Storage Avoid heat, sparks, open flames, and other sources of

ignition.Strong acids, strong oxidizers, sulfonyl chlorides, isocyanates, nitrites, activiated carbon.

Stable under normal conditions, Use and Storage Extreme temperatures.

Reactive with oxidizing agents, reducing agents, organic materials, metals. Chemically stable. Contact with water will generate extreme heat. Contact

with most metals will generate flammable hydrogen gas.

String acids, strong oxidizers, strong reducing agents and alkalis. Stable under normal conditions and storage. Extreme temperature. Strong acids, strong bases, strong oxidizers, and reducing agents. Aluminium, zinc, and other metals.

Stable under normal conditions of use and storage. None known.

None known.Highly reactive with strong oxidizing agents and acids. Avoid contact with aluminium, copper, copper alloys and nickel.

Stable under normal conditions of use and storage. None known.

Chlorinated and flurorinated hydrocarbons (chloroform, difluorethane), acetyldehyde, acrolein, aluminium, chlorine trifluoride, hydroquinone, maleic anhydride, phosphorouspentoxide, and

Stable under normal conditions of use and storage. Sodium hydroxide rapidely absorbs carbon dioxide from the air forming sodium carbonate, Mixture with water, acid or incompatible materials can cause splattering and release of large amounts of heat.


CSB VIDEO



References:

1. Fundamentals of Industrial Hygiene (5th Edition), Barabara A. Plog., Patricia J. Quinlan. Year 2002.

2. Quebec Occupational Health and Safety Act and Regulations. Sep. 2012.

3. Vaudreuil-Dorion FSP 9. Field HSE Procedure – Hazard Assessment Checklist. 2010.

4. Corporate Safety Standard. Laboratory Safety Standard and Chemical Hygiene. Feb 2011.

5. Managing Chemical Reactivity – Minimum Best Practice. Hans K. Fauske. 2000.

6. EPA. US Environmental Protection Agency. Office of Water (4606M). Incompatible Chemical Storage. EPA 816-F-09-002. Jan 2008.

7. Chemical Safety Board (CSB). Video. Oct 2012.

8. CCPS. Centre for Chemical Process Safety. Oct 2012.


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Chemical Reactivity Compatibility Awareness - Oct 2, 2012

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