Octadecanoic acid, zinc salt
Zinc distearate
Stearic acid, zinc salt
C36H70O4Zn / Zn(C18H35O2)2
Molecular mass: 632.3
ICSC # 0987
CAS # 557-05-1
RTECS # ZH5200000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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Finely dispersed particles form explosive mixtures in air.
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
Prevent build-up of electrostatic charges (e.g., by grounding).
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
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Avoid inhalation of fine dust and mist.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Rinse skin with plenty of water or shower.
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•Eyes
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
(Extra personal protection: P1 filter respirator for inert particles).
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Important Data
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Physical State; Appearance:
WHITE, FINE, SOFT POWDER.
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.
Chemical Dangers:
The substance decomposes
on burning
producing irritating and
toxic fumes
including
zinc oxide.
Occupational Exposure Limits:
TLV: (stearates) 10 mg/m3 A4 (not classifiable as a human carcinogen); (ACGIH 2008).
MAK not established.
OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol.
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Melting point: 130°C
Density: 1.1
g/cm3
Solubility in water:
none
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Flash point: 277°C o.c.
Auto-ignition temperature: 420°C
Explosive limits, vol% in air: 20 g/m3 - ?
Octanol/water partition coefficient as log Pow: 1.2
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Environmental
Data
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N O T E S
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NFPA Code: H 0; F 1; R 0;
Card has been partially updated in November 2008: see Occupational Exposure Limits, Ingestion First Aid.
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ADDITIONAL INFORMATION
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ICSC: 0987
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ZINC STEARATE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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