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Zinc stearate CAS#557-05-1

1. Lubricating Properties: Zinc stearate provides excellent lubrication, enhancing the processing of various materials.

2. Stable and Non-Hazardous: It is stable under normal conditions, non-toxic, and non-polluting, with minimal irritancy.

3. Solubility Versatility: Insoluble in water, but soluble in organic solvents like benzene and turpentine, allowing for diverse applications.

4. High Melting Point: With a melting point of 128-130°C, it remains stable under moderate heat, useful in manufacturing and processing.

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Product Details

Zinc stearate is a white, lightweight, fine powder with the molecular formula Zn(C₁₇H₃₅COO)₂. Its molecular structure is RCOOZnOOCR (where R represents the mixed alkyl groups found in industrial stearic acid). It is flammable, with a specific gravity of 1.095, an autoignition point of 900°C, a density of 1.095, and a melting point of 130°C. The powder has a greasy texture.

Zinc stearate CAS#557-05-1

It is insoluble in water, ethanol, and ether but soluble in hot ethanol, turpentine, benzene, and other organic solvents, as well as in acids. When heated in an organic solvent, zinc stearate dissolves and forms a colloid upon cooling. In the presence of strong acids, it decomposes into stearic acid and the corresponding zinc salt.

The compound exhibits lubricating properties, is hygroscopic, and is non-toxic, with only slight irritancy. It is non-polluting and non-hazardous. Zinc stearate can be separated from calcium stearate by taking advantage of their differing solubilities: zinc stearate dissolves in benzene, whereas calcium stearate does not.

Zinc stearate CAS#557-05-1

Melting point	128-130 °C (lit.)
Boiling point	240℃[at 101 325 Pa]
density	1.095g/cm3
vapor pressure	0Pa at 25℃
Fp	180℃
storage temp.	Inert atmosphere,Room Temperature
solubility	alcohol: insoluble(lit.)
form	Powder
color	White
Odor	wh. powd., faint char. odor
Water Solubility	Insoluble
Merck	14,10158
BRN	3919706
Exposure limits	ACGIH: TWA 10 mg/m3; TWA 3 mg/m3 OSHA: TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: TWA 10 mg/m3; TWA 5 mg/m3
Stability:	Stable. Incompatible with strong oxidizing agents.
LogP	4.64 at 25℃
CAS DataBase Reference	557-05-1(CAS DataBase Reference)
NIST Chemistry Reference	Zinc(II) n-octadecanoate(557-05-1)
EPA Substance Registry System	Zinc stearate (557-05-1)

Safety Information

Hazard Codes	Xi
Risk Statements	37
Safety Statements	22-26-36/37/39-38-24/25
OEB	B
OEL	TWA: 10 mg/m3 (total)
WGK Germany	-
RTECS	ZH5200000
Autoignition Temperature	1454 °F
TSCA	Yes
HS Code	29157090
Hazardous Substances Data	557-05-1(Hazardous Substances Data)
Toxicity	LD50 oral in rat: > 10gm/kg