“Consult the SDS” - Connecting Chemistry & Safety€¦ · “Consult the SDS” SamuellaB....

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“ConsulttheSDS”

Samuella B.SigmannAppalachianStateUniversity

Boone,NCApril4,2017

Whydowewantastudentto“consultanSDS”?

• Wewantstudentstorecognizethehazardsofthechemicalstheywillbeworkingwith

• Wewanttoengagestudentsinallaspectsofresearch

• TheSDSisarecognizedsourceofinformationorganizedspecificallytoalerttheuseraboutspecifichazards– AstheinstructororPI,haveyoulookedattheSDSforthechemical?

WillthechemicalsIneedtouseinthisexperiment presenthazard(s)forme?

http://pairadimes.davidtruss.com/

WillConsultingaToolProtectaStudentWhenWorkingwithaChemical?

• DoIhavea“good”SDS?• DoIknowwhattolookforonanSDS?

• CanIrecognizeincorrectorincompleteinformationontheSDS?

• WillIdotheassignment?• DoIknowwhentoaskforhelp?

…butwillanauthoritarianassignmentwillnotprotect studentswhodonothavetheknowledgeand/orskill toworkthroughthe previousquestions?

IncludeanSDSassignmentasaneducationaltool– thiscanincreaseknowledgeandskillandimprovecultureThiscanstartinteachinglabs,butshoulddefinitelybepursuedintheresearchlab

DOIHAVEA“GOOD”SDS?AFewGuidelinesforTeachingStudents

BeSuspiciousofDocumentswithMissingInformation

DoIHaveA“good”SDS?

OSHADoesNotRegulateNon-MandatorySections

• TheSDSmustalsocontainSections12through15,tobeconsistentwiththeUNGloballyHarmonizedSystemofClassificationandLabelingofChemicals(GHS),butOSHAwillnotenforcethecontentofthesesectionsbecausetheyconcernmattershandledbyotheragencies.

• Section12:– EcologicalInformation

• Section13:– DisposalConsiderations

• Section14:– TransportInformation

• Section15:– RegulatoryInformation

OSHABrief

https://www.ccohs.ca/oshanswers/chemicals/whmis_ghs/sds.html

“N/A”MeansWhat? “NoDataAvailable”Or

“NotApplicable”

Theycouldsimplymeanthatthepreparerdidnotlocatethedata

DOESNOT=SAFE

LookForMoreUsefulTerms

WHATSHOULDILOOKFORONSDS?AFewGuidelinesforTeachingStudents

SpotCheckGeneralInformation• MakesurethatyouhavetheSDSofyourchemicalinGHS

format– Preferablywiththehazardcodesandcategories• Makesureyouruseisasintendedbythemanufactureror

supplieraslistedontheSDSinSection1• CheckSection2 foranyknownsignsorsymptoms• CheckSection3 toseewhichcomponentsarehazardous• CheckSection8 foraglovematerialrecommendation• CheckSection9 toseeifan“OdorThreshold”hasbeen

established.Notalwaysreliable– butifyouaresmellingsomething,youknowyouarebeingexposed– IsitlowerthantheOELs?WhatisanOEL?

WhatShouldILookForOnAnSDS?

• ChemicalswhichhavethesepictogramshavesignificanthazardandmayrequiremorethananSDSlook

Socheckthecategoryandbeespeciallyconcernedwhenthechemicalisincategory1

• Chemicalswitha “DANGER”signalword– checktoseewhichhazard(s)triggeredthesignalwordwhentherearemultiplepictograms

http://www.sigmaaldrich.com/safety-center/globally-harmonized.html

• LookatthetoxicologicaldatainSection11– ThisistheinformationthatmanufacturersusedtoclassifythechemicalforGHSin“AcuteToxicity”category

– Termsyouneedtounderstandhere“LD”and“LC”–Whatanimalwastested?–WhatwastheRouteofEntry(ROE)– Theform ofthechemical?– Refertotheslideon“ReliableInformation”

GeneralGuidance:Thelowerthelethaldosenumberwithintheeachrow,themoreacutelytoxicthesubstance

• Whatexposuredataisavailableforthechemical?– CheckSection8.Somanyacronyms(PEL,TLV,STEL,IDLH)!– Refertotheslideon“ReliableInformation”

– Lookattheoccupationalexposuredata– Whyareunitsdifferent?Theunitsofthisdatadependontheformofthechemical• ForsubstancesthataregasandvaporatnormalT&P,ppmforotherforms,mg/m3

• Needtoconvert?TrytheconverteratNIOSH• Needabetterexplanation?TryCCOSH

– GeneralguidanceonOELs– thelowerthenumber,themoreimportantitistoensurethatyourventilationisappropriateandsufficient

CANIRECOGNIZEINCORRECTORINCOMPLETEINFORMATIONONTHESDS?

AFewGuidelinesforTeachingStudents

Practice!Comparedocuments–StartwithaFamiliarChemical

NitricAcidCAS7697-37-2

5%AceticAcidCAS8028-52-2

CanIrecognizeincorrectorincompleteinformationontheSDS?

NitricAcid

SDS1 SDS2NitricAcid

Section5– FirefightingMeasures

Section8– ExposureControls

Section6– AccidentalRelease

NitricAcid

Section8– ExposureControls

NitricAcid

5%AceticAcid

“Theaboveinformationisbelievedtobecorrectbutdoesnotpurporttobeallinclusiveandshallbeusedonlyasaguide.Theinformationinthisdocumentisbasedonthepresentstateofourknowledgeandisapplicabletotheproductwithregardtoappropriatesafetyprecautions.Itdoesnotrepresentanyguaranteeofthepropertiesoftheproduct.”

RememberSDSsare“Legal”Documents

FindReliableInformation• Lookforpeerrevieweddata– NIH– ChemIDPlus Advanced– PubChem’s LaboratoryChemicalSafetySummaries(LCSSs)(SearchCompounds)

• ConciseInformationonGHShazardclassesandcategories– SigmaAldrich

• InteractiveLearningParadigms,IncorporatedresourcesforunderstandingtermsonSDSs– TheMSDSHyperGlossary– TheMSDSDemystifier

DOIHAVETODOTHEASSIGNMENT?AFewGuidelinesforTeachingStudents

UseGroupAssignments

• HaveeachpersonfindanSDSforthechemicalandthenthegroupcancomparequality–Collaborate!(Youmightevenlearnsomething)

DoIHavetoDotheAssignment?

GradeAssignments

• Include theSDSassignmentonthesyllabusinclassesandmakeitagradedcomponent

ProjectRequirement

• Ifitisanupperlevelclasslabandthereareindividualprojects,do

notletworkbeginuntiltheassignmenthasbeencompleted

LeadByExample

AstheinstructororPI,haveyoulookedattheSDSforthechemical?

Bereadywhenthestudentshavequestionsbecausetheywillvaluetheassignmentoreffortifyoudo!

AskQuestions!Sometimesitcomesdowntotrustingyourinstincttorecognizewhenyoudon’tknowwhatyoudon’tknow!

DoIknowwhentoaskforhelp?

Whentheyarerecognizingwhattheydon’tknowandthenasking&answeringtherightquestions

DoIknowwhentoaskforhelp?

Howdoyouknowwhenyourstudentsarelearningsafety?

Acknowledgements

• Asalways,theA.R.SmithDepartmentofChemistryforallowingmethejobflexibilitytopartakeinACSprojects

Questions?