# 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
Exposure Limits | 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) | IP: NA |  | 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
See also: INTRODUCTION