Stearic acid Stearic acid
Structural formula
| Business number | 018D |
|---|---|
| Molecular formula | C18H36O2 |
| Molecular weight | 284.48 |
| label |
stearic acid, n-octadecanoic acid, Carboxylic acid C18, Proviscol wax, n-Octadecanoic acid, accelerator, acidic solvent |
Numbering system
CAS number:57-11-4
MDL number:MFCD00002752
EINECS number:200-313-4
RTECS number:WI2800000
BRN number:608585
PubChem number:24899616
Physical property data
1. Properties: white waxy transparent solid or yellowish waxy solid. Can be dispersed into powder with slight butter smell.
2. Relative density (g/mL, 20/4℃): 0.9408
3. Relative vapor density (g/mL, air=1): Undetermined
4. Melting point (ºC): 67~69
5. Boiling point (ºC, normal pressure): 183~184 (133.3pa)
6. Boiling point (ºC, 5.2kPa): 360
7. Refractive index (n20D): 1.455
8. Flash point ( ºC):＞110
9. Gas phase standard combustion heat (enthalpy) (kJ·mol-1): -11446.9
10. Gas phase standard claim Heat (enthalpy) (kJ·mol-1): -781.2
11. Liquid phase standard combustion heat (enthalpy) (kJ·mol-1): -11343.4
12. Liquid phase standard claims heat (enthalpy) (kJ·mol-1): -884.7
13. Crystal phase Phase standard combustion heat (enthalpy) (kJ·mol-1): -11280.4
14. Crystal phase standard claim heat (enthalpy) (kJ·mol-1 ): -947.7
15. Critical pressure (KPa): Undetermined
16. Log value of oil-water (octanol/water) partition coefficient: Undetermined
17. Explosion upper limit (%, V/V): Undetermined
18. Explosion lower limit (%, V/V): Undetermined
19. Solubility: Insoluble in water, slightly soluble in cold ethanol, and easier to dissolve when heated. Slightly soluble in acetone and benzene, easily soluble in ether, chloroform, hot ethanol, carbon tetrachloride and carbon disulfide.
Toxicological data
Intravenous injection of mice and ratsLC50: (23±0.7)mg/kg, (21.5±1.8)mg/kg.
Ecological data
�That is, first-level stearic acid is obtained. The glycerol water separated during the hydrolysis process is neutralized with milk of lime at 80-100℃ , refined glycerin can be obtained through processes such as suction filtration concentration, pressure filtration, vacuum distillation, activated carbon decolorization and filtration pressure. (2) Pressing method uses animal and vegetable oils as raw materials, in a hydrolyzing agent (such as zinc oxide) First-grade stearic acid can be obtained through high-pressure hydrolysis, washing, vacuum distillation, pressing, bleaching and crystallization in the presence of alcohol. (3)In the presence of decomposing agents (sulfonated mixtures such as benzene and naphthalene), the hardened oil, tallow or mutton fat is hydrolyzed, and then acidified, distilled, pressed, and pickled to obtain the finished product.
(4)． Using oleic acid hydrogenation method.
(5). It is produced by using the C10~C20 and C18~C20 fractions of synthetic fatty acids as raw materials, melting, pickling (using 1% sulfuric acid) casting, pressing, melting, pickling, and dehydration and crystallization. 2. Tobacco: OR, 44; FC, 9, 15, 18, 41, 43, 50; OR, 26; BU, OR, 18; BU, 9; OR, 19.
Purpose
1.200 type stearic acid can be used as the activator of vulcanization accelerator for high-grade rubber products, the main raw material of polyvinyl chloride soap stabilizer, the main raw material of cosmetic cream and cold cream, the raw material of high melting point grease and waterproofing agent, and polishing paste. It is the main raw material for lubricating polishing agents and release lubricants for textiles, printing and dyeing, leather and wax paper, and raw materials for cultural supplies such as copy paper, pencils and crayons.
Type 800 stearic acid can be used as a vulcanization accelerator and activator for general rubber products, the main raw material of polishing paste, the main raw material of soap-based grease, and the raw material of stationery. 2.Stearic acid is a fatty acid widely present in nature. Almost all oils contain stearic acid in varying amounts. In addition to being used as an emulsifier for oil-based drilling fluids, it is also used as a vulcanization activator for natural rubber, synthetic rubber (except butyl rubber) and latex, and as a raw material for plastic plasticizers and stabilizers. It is used in medicine to prepare ointments, suppositories, etc., and is also used to make cosmetics, candles, waterproofing agents, polishes, etc. This product is used in the food industry as a lubricant, defoaming agent and raw material for food additives such as glyceryl stearate, sorbitan stearate and sucrose ester. 3.Used as a solvent for determining molecular weight. Preparation of stearates and esters, carbon black diffusing agents, active agents to promote acidification. 4.Used as an emulsifier for oil-based drilling fluids. It can also be used as lubricant and wetting agent in rubber industry and textile industry. 5.Widely used as base raw material for cosmetics such as cream, cold cream, hair cream, lotion, shampoo, etc.
