NIOSH Pocket Guide to Chemical Hazards

Zinc stearate CAS 557-05-1
Zn(C18H35O2)2 RTECS ZH5200000
Synonyms & Trade Names
Dibasic zinc stearate, Zinc salt of stearic acid, Zinc distearate
DOT ID & Guide
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL†: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH N.D. Conversion
Physical Description
Soft, white powder with a slight, characteristic odor.
MW: 632.4
BP: ?
MLT: 266°F
Sol: Insoluble
VP: 0 mmHg (approx)

Sp.Gr: 1.10
Fl.P(oc): 530°F
UEL: ?
LEL: ?
MEC: 20 g/m3
Combustible Solid
Incompatibilities & Reactivities
Oxidizers, dilute acids [Note: Hydrophobic (i.e., repels water).]
Measurement Methods
NIOSH 0500, 0600
Personal Protection & Sanitation
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Fresh air
Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, upper respiratory system; cough
Target Organs Eyes, skin, respiratory system