Chinese name: Stearic acid
English name: Stearic acid
CAS: 57-11-4
EINECS number: 266-928-5
Molecular formula: C18H36O2
MDL number: MFCD00002752
Molecular weight: 284.48
Appearance properties: Pure products are white soft pieces with luster.
Appearance: Pure product is white soft piece with gloss. Slightly soluble in cold water, soluble in alcohol, acetone, easily soluble in benzene, chloroform, ether, carbon tetrachloride, carbon disulfide, amyl acetate and toluene.
Solubility insoluble in water, slightly soluble in ethanol, soluble in acetone, benzene, easily soluble in ether, chloroform, carbon tetrachloride and so on.
Melting point: 67-72 °C(lit.)
Boiling point: 361 °C(lit.)
Density: 0.84
Vapor pressure: 1 mm Hg (173.7 °C)
FEMA: 3035
Refractive index: 1.4299
Flash point: >230 °F
Storage conditions: 2-8°C
Solubility: Practically insoluble in water, soluble in ethanol (96 per cent) and in light petroleum (bp: 50-70 °C).
Acidity factor (pKa) : pKa 5.75±0.00(H2O t = 35) (Uncertain)
Form: powder
Specific gravity: 0.84 (80℃)
Color: White
Odor: odorless mild fatty
Scent type: odorless
Water solubility: 0.1-1 g/100 mL at 23 ºC
JECFA Number: 116
Merck: 14,8804
BRN: 608585
Dielectric constant: 2.3 (22℃)
Exposure limit: ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
InChIKey: QIQXTHQIDYTFRH-UHFFFAOYSA-N
LogP: 8.22
use
Used in the preparation of soaps, cosmetics, pharmaceuticals and other organic chemicals