Certifications 2

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STANLEYCHALKSMSDS 
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STANLEYCHALKSMSDS
PAGE9OF10
DEFINITIONSOFTERMS(Continued)
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EXPOSURELIMITSINAIR(continued):
NIOSHRELs:NIOSH’sRecommendedExposureLimits.
PEL-Permissible Exposure Limit:  OSHA’s Permissible Exposure Limits.  This
exposure value means exactly the same as a TLV, except that it is enforceable by
OSHA.TheOSHAPermissibleExposureLimitsarebasedinthe1989PELsandthe
June,1993AirContaminantsRule(FederalRegister
:58:35338-35351and58:40191).
Both the current PELs and the vacated PELs are indicated.  The phrase, “Vacated
1989PEL,”isplacednexttothePELthatwasvacatedbyCourtOrder.
SKIN:Usedwhenathereisadangerofcutaneousabsorption.
STEL-ShortTermExposureLimit:ShortTermExposureLimit,usuallya15-minute
time-weighted average (TWA) exposure that should not be exceeded at any time
during a workday, even if the 8-hr TWA is within the TLV-TWA, PEL-TWA or REL-
TWA.
TLV-ThresholdLimitValue:Anairborneconcentrationofasubstancethatrepresents
conditionsunderwhichitisgenerallybelievedthatnearlyallworkersmayberepeatedly
exposedwithoutadverseeffect.Thedurationmustbeconsidered,includingthe8-hour.
TWA-TimeWeightedAverage:TimeWeightedAverageexposureconcentrationfora
conventional8-hr(TLV,PEL)oruptoa10-hr(REL)workdayanda40-hrworkweek.
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM HAZARD
RATINGS: 
This rating system was developed by the National Paint and Coating
Association and has been adopted by industry to identify the degree of chemical
hazards.
HEALTHHAZARD
:
0(MinimalHazard
:Nosignificanthealthrisk,irritationofskinoreyesnotanticipated.
SkinIrritation:Essentiallynon-irritating.PIIorDraize=“0”.EyeIrritation:Essentially
non-irritating, orminimaleffects which clearin< 24 hours[e.g.mechanicalirritation].
Draize=“0”.OralToxicityLD
50
Rat:<5000mg/kg.DermalToxicityLD
50
RatorRabbit:
<2000mg/kg.InhalationToxicity4-hrsLC
50
Rat:<20mg/L.);1(SlightHazard:Minor
reversibleInjurymayoccur;slightlyormildlyirritating.SkinIrritation:Slightlyormildly
irritating.EyeIrritation:Slightly ormildlyirritating.OralToxicityLD
50
Rat:>500-5000
mg/kg.  Dermal Toxicity LD
50
Rat or Rabbit:  > 1000-2000 mg/kg. Inhalation Toxicity
LC
50
4-hrsRat:>2-20mg/L);2(ModerateHazard:Temporaryortransitoryinjurymay
occur.SkinIrritation:Moderatelyirritating;primaryirritant;sensitizer.PIIorDraize>0,
<5.EyeIrritation:Moderatelytoseverelyirritatingand/orcorrosive;reversiblecorneal
opacity;cornealinvolvementorirritationclearingin8-21days.Draize>0,<
25.Oral
ToxicityLD
50
 Rat:> 50-500mg/kg.Dermal ToxicityLD
50
Rator Rabbit: > 200-1000
mg/kg.InhalationToxicityLC
50
4-hrsRat:>0.5-2mg/L.);3(SeriousHazard:Major
injurylikelyunlesspromptactionistakenandmedicaltreatmentisgiven;highlevelof
toxicity; corrosive.  Skin Irritation: Severely irritating and/or corrosive; may destroy
dermaltissue,causeskinburns,dermalnecrosis.PIIorDraize>5-8withdestruction
of tissue. Eye Irritation:  Corrosive, irreversible destruction of ocular tissue; corneal
involvement or irritation persisting for more than 21 days.  Draize > 80 with effects
irreversiblein21days.OralToxicityLD
50
Rat:>1-50mg/kg.DermalToxicityLD
50
Rat
orRabbit:>20-200mg/kg.InhalationToxicityLC
50
4-hrsRat:>0.05-0.5mg/L.);4
(SevereHazard:Life-threatening;majororpermanentdamagemayresultfromsingle
orrepeatedexposure.SkinIrritation:Notappropriate.Donotrateasa“4”,basedon
skinirritationalone.EyeIrritation:Notappropriate.Donotrateasa“4”,basedoneye
irritationalone.OralToxicityLD
50
Rat:<1mg/kg.DermalToxicityLD
50
RatorRabbit:
<
20mg/kg.InhalationToxicityLC
50
4-hrsRat:<0.05mg/L).
FLAMMABILITYHAZARD
:
0(MinimalHazard-Materialsthatwillnotburninairwhenexposuretoatemperatureof
815.5°C[1500°F]foraperiodof5minutes.);1(SlightHazard-Materialsthatmustbe
pre-heatedbeforeignitioncanoccur.Materialrequireconsiderablepre-heating,under
allambienttemperatureconditionsbeforeignitionandcombustioncanoccur,Including:
Materialsthatwillburninairwhenexposedtoatemperatureof815.5°C(1500°F)fora
period of 5 minutes or less;Liquids, solids and semisolids having a flash point at or
above93.3°C[200°F](e.g.OSHAClassIIIB,or;Mostordinarycombustiblematerials
[e.g.wood,paper,etc.];2(ModerateHazard-Materialsthatmustbemoderatelyheated
orexposedtorelativelyhighambienttemperaturesbeforeignitioncanoccur.Materials
inthisdegreewouldnot,undernormalconditions,formhazardousatmospheresinair,
but under high ambient temperatures or moderate heating may release vapor in
sufficientquantitiestoproducehazardousatmospheresinair,Including:Liquidshaving
aflash-pointatorabove37.8°C[100°F];Solidmaterialsintheformofcourseduststhat
mayburnrapidlybutthatgenerallydonotformexplosiveatmospheres;Solidmaterials
inafibrousorshreddedformthatmayburnrapidlyandcreateflashfirehazards(e.g.
cotton,sisal,hemp; Solidsand semisolidsthat readily giveoffflammable vapors.); 3
(Serious Hazard- Liquids and solids that can be ignited under almost all ambient
temperatureconditions.Materialsinthisdegreeproducehazardousatmosphereswith
airunderalmostallambienttemperatures,or,unaffectedbyambienttemperature,are
readilyignitedunderalmostallconditions,including:Liquidshavingaflashpointbelow
22.8°C[73°F]andhavingaboilingpointatorabove38
° C[100 ° F]andbelow37.8°C
[100°F][e.g.OSHAClassIBandIC];Materialsthatonaccountoftheirphysicalformor
environmentalconditionscanformexplosivemixtureswithairandarereadilydispersed
inair[e.g.,dustsofcombustiblesolids,mistsordropletsofflammableliquids];Materials
that burn extremely rapidly, usually by reason of self-contained oxygen [e.g. dry
nitrocellulose and many organic peroxides]); 4 (Severe Hazard-Materials that will
rapidly or completely vaporize at atmospheric pressure and normal ambient
temperatureorthatarereadilydispersedinair,andwhichwillburnreadily,including:
Flammablegases;Flammablecryogenicmaterials;Anyliquidorgaseousmaterialthat
isliquidwhileunderpressureandhasaflashpointbelow22.8°C[73°F]andaboiling
point below 37.8°C [100°F] [e.g. OSHA Class IA; Material that ignite spontaneously
whenexposedtoairatatemperatureof54.4°C[130°F]orbelow[e.g.pyrophoric]).
HAZARDOUS MATERIALS IDENTIFICATION SYSTEM HAZARD
RATINGS(continued):

PHYSICALHAZARD
:
0 (Water Reactivity: Materials that do not react with water.  Organic Peroxides:
Materials that are normally stable, even under fire conditions and will not react with
water.Explosives:SubstancesthatareNon-Explosive.UnstableCompressedGases:
No Rating.  Pyrophorics:  No Rating. Oxidizers:  No “0” rating allowed. Unstable
Reactives:Substancesthatwillnotpolymerize,decompose,condenseorself-react.);1
(Water Reactivity: Materials that change or decompose upon exposure to moisture.
Organic Peroxides:  Materials that are normally stable, but can become unstable at
hightemperaturesandpressures.Thesematerialsmayreactwithwater,butwillnot
release energy. Explosives: Division 1.5& 1.6 substancesthat arevery insensitive
explosives or that do not have a mass explosion hazard.  Compressed Gases:
Pressure below OSHA definition. Pyrophorics:  No Rating.  Oxidizers:  Packaging
Group III; Solids
:  any material that in either concentration tested, exhibits a mean
burning time less than or equal to the mean burning time of a 3:7 potassium
bromate/cellulose mixture and the criteria for Packing Group I and II are not met.
Liquids
:anymaterialthatexhibitsameanpressurerisetimelessthanorequaltothe
pressure rise time of a 1:1 nitric acid (65%)/cellulose mixture and the criteria for
Packing Group I and II are not met. Unstable Reactives: Substances that may
decompose, condense or self-react, but only under conditions of high temperature
and/orpressureandhavelittleornopotentialtocausesignificantheatgenerationor
explosivehazard.  Substances that readily undergo hazardous polymerization in the
absence of inhibitors.); 2 (Water Reactivity:  Materials that may react violently with
water.OrganicPeroxides:Materialsthat,inthemselves,arenormallyunstableandwill
readilyundergoviolentchemicalchange,butwillnotdetonate. Thesematerialsmay
alsoreactviolentlywithwater.Explosives:Division1.4–Explosivesubstanceswhere
theexplosiveeffectarelargelyconfinedtothepackageandnoprojectionoffragments
of appreciable size or range are expected.  Anexternalfire must not cause virtually
instantaneous explosion of almost the entire contents of the package.  Compressed
Gases:  Pressurized and meet OSHA definition but < 514.7 psi absolute at 21.1°C
(70°F)[500psig].Pyrophorics:NoRating.Oxidizers:PackingGroupIISolids
:any
materialthat,eitherinconcentrationtested,exhibitsameanburningtimeoflessthanor
equaltothemeanburningtimeofa2:3potassiumbromate/cellulosemixtureandthe
criteriafor Packing Group Iare not met. Liquids
:  anymaterialthat exhibits a mean
pressure rise time less than or equal to the pressure rise of a 1:1 aqueous sodium
chloratesolution (40%)/cellulosemixture andthecriteriaforPackingGroup I are not
met.UnstableReactives:Substancesthatmaypolymerize,decompose,condense,or
self-react at ambient temperature and/or pressure, but have a low potential for
significantheatgenerationorexplosion.Substancesthatreadilyformperoxidesupon
exposuretoairoroxygenatroomtemperature);3(WaterReactivity:Materialsthatmay
formexplosivereactionswithwater.OrganicPeroxides:Materialsthatarecapableof
detonation or explosive reaction, but require a strong initiating source, or must be
heated under confinement before initiation; or materials that react explosively with
water. Explosives:  Division 1.2 – Explosive substances that have a fire hazard and
either a minor blast hazardor a minor projection hazard or both, but do not havea
massexplosionhazard.CompressedGases:Pressure>
514.7psiabsoluteat21.1°C
(70°F) [500 psig]. Pyrophorics: No Rating.  Oxidizers:  Packing Group I Solids
:any
materialthat,ineitherconcentrationtested,exhibitsameanburningtimelessthanthe
mean burning time of a 3.:2 potassium bromate/cellulose mixture.  Liquids
: Any
materialthatspontaneouslyigniteswhenmixedwithcelluloseina1:1ratio,orwhich
exhibitsameanpressurerisetimelessthanthepressurerisetimeofa1:1perchloric
acid(50%)/cellulosemixture.UnstableReactives:Substancesthatmaypolymerize,
decompose,condenseorself-reactatambienttemperatureand/orpressureandhave
a moderate potential to cause significant heat generation or explosion.);  4 (Water
Reactivity:  Materials that react explosively with water without requiring heat or
confinement.OrganicPeroxides:Materialsthatarereadilycapableofdetonationor
explosivedecompositionatnormaltemperatureandpressures. Explosives:Division
1.1&1.2-explosivesubstancesthathaveamassexplosionhazardorhaveaprojection
hazard.Amassexplosionisonethataffectsalmosttheentireloadinstantaneously.
CompressedGases:NoRating.Pyrophorics:AddtothedefinitionofFlammability“4”.
Oxidizers:  No “4” rating. Unstable Reactives:  Substances that may polymerize,
decompose,condenseorself-reactatambienttemperatureand/orpressureandhave
ahighpotentialtocausesignificantheatgenerationorexplosion.).
NATIONALFIREPROTECTIONASSOCIATIONHAZARDRATINGS:
HEALTH HAZARD: 0 (materials that, under emergency conditions, would offer no
hazardbeyondthatofordinarycombustiblematerials):GasesandvaporswhoseLC
50

foracuteinhalationtoxicityisgreaterthan10,000ppm.DustsandmistswhoseLC
50

foracuteinhalationtoxicityisgreaterthan200mg/L.MaterialswhoseLD
50
foracute
dermal toxicity is greater than 2000 mg/kg.  Materials whose LD
50
 for acute oral
toxicityisgreaterthan2000mg/kg.Materialsthatareessentiallynon-irritatingtothe
respiratorytract,eyesandskin.1(materialsthat,underemergencyconditions,can
cause significant irritation):  Gases and vapors whose LC
50
 for acute inhalation
toxicityisgreaterthan5,000ppmbutlessthanorequalto10,000ppm.Dustsand
mistswhoseLC
50
foracuteinhalationtoxicityisgreaterthan10mg/Lbutlessthanor
equal to 200 mg/L.  Materials whose LD
50
for acute dermal toxicity is greaterthan
1000mg/kgbutlessthanorequal to 2000mg/kg.  Materials whose LD
50
foracute
oral toxicity is greater than 500 mg/kg but less than or equal to 2000 mg/kg.
Materials that cause slight to moderate irritation to the respiratory tract, eyes and
skin. 2 (materials that, under emergency conditions, can cause temporary
incapacitationorresidualinjury):Gasesand vapors whose LC
50
for acute inhalation
toxicity is greater than 3,000 ppm but less than or equal to 5,000 ppm. Dusts and
mistswhoseLC
50
foracuteinhalationtoxicityisgreaterthan2mg/Lbutlessthanor
equalto10mg/L.