Nomenclature
CAS number: 557-05-1
Octadecanoic acid zinc salt.
C
36H
70O
4Zn; mol wt 632.35.
C 68.38%, H 11.16%, O 10.12%, Zn 10.34%.
Zn(C
18H
35O
2)
2.
Description and references
Usually occurs as a mixture of the zinc salts
of stearic and palmitic acids, and usually with some excess of zinc
oxide. Contains 13.5-15% ZnO. Prepd from stearic acid and zinc chloride:
Vold, Hattiangdi, Ind. Eng. Chem. 41, 2311 (1949).
Properties
Fine, soft, bulky powder; slight characteristic
odor; neutral reaction. Repels water. mp about 120°. Insol in water, alcohol, ether. Sol
in benzene; dec by dil acids.Caution
Potential symptoms of overexposure
are irritation of eyes, skin, upper respiratory system; cough. See NIOSH Pocket Guide to Chemical
Hazards (DHHS/NIOSH 97-140, 1997) p 338.Use
In tablet manuf; in cosmetic and pharmaceutical
powders and ointments; as a flatting and sanding agent in lacquers;
as a drying lubricant and dusting agent for rubber; as a plastic mold
releasing agent; as a waterproofing agent for concrete, rock wool,
paper, textiles.
Therapeutic Category (Veterinary)
Antiseptic, astringent, protective (topical).