What is stearic acid? How to store it
Cata Chemical Technology
What is stearic acid? How to store it? Stearic acid, namely octadecanoic acid, has a simple structural formula of CH3 (CH2) 16COOH, which is produced by hydrolysis of oil and fat and is mainly used to produce stearate. Each gram is dissolved in 21ml ethanol, 5ml benzene, 2ml chloroform or 6ml carbon tetrachloride. It exists in flue-cured tobacco, burley tobacco, oriental tobacco and smoke. It is the fatty acid that makes up stearin. Chinese alias: octadecanoic acid; Octadecylic acid; Order of the Secretary; Aliphatic acid; Hard wax acid; Stearic acid; Octadecylic acid; Octadecylic acid, ammonium octadecanoate; Stearic acid and ammonium stearate. Properties and stability of stearic acid: pure products are white soft tablets with luster. Slightly soluble in cold water, soluble in alcohol and acetone, easily soluble in benzene, chloroform, ether, carbon tetrachloride, carbon disulfide, amyl acetate and toluene, non-toxic.
Is the hardening oil easy to be oxidized? Before hardening, there are unsaturated bonds in the molecules, which are easy to be oxidized by oxygen in the air and cause oil deterioration; It reacts with hydrogen and becomes hardened oil. Without unsaturated bond, it is not easy to be oxidized
Hardening oil is relatively stable to heat and can be mixed with other waxes to improve solvent resistance, oil resistance, hardness and melting point. It is used in cosmetics, lubricating grease, leather shoe oil, crayons and pharmaceuticals.
Storage method of stearic acid
Type 200 stearic acid is packed in cardboard boxes. Type 800 stearic acid is packed in woven bags lined with plastic bags. Store in a cool and ventilated place. It can be packed in cardboard boxes or woven bags lined with plastic bags. The net weight of each box (bag) is 25kg or 50kg. Store in a cool, dry and ventilated place, and keep away from fire sources and oxidants. Store and transport according to general chemical regulations.
Physical property data of stearic acid, property: white waxy transparent solid or yellowish waxy solid. It can be dispersed into powder with slight smell of butter. Relative density (g/mL, 20/4 ℃): 0.9408; Relative vapor density (g/mL, air=1): not determined; Melting point (oC): 67~69; Boiling point (oC, normal pressure): 183-184 (133.3pa); Boiling point (oC, 5.2kPa): 360; Refractive index (n20D): 1.455; Flash point (oC):>110
Gas phase standard combustion heat (enthalpy) (kJ · mol-1): -11446.9; Gas phase standard claimed heat (enthalpy) (kJ · mol-1): -781.2; Standard combustion heat (enthalpy) of liquid phase (kJ · mol-1): - 11343.4; Liquid phase standard claimed heat (enthalpy) (kJ · mol-1): -884.7; Standard combustion heat (enthalpy) of crystalline phase (kJ · mol-1): - 11280.4; The claimed heat (enthalpy) of crystal phase standard (kJ · mol-1): -947.7; Critical pressure (KPa): logarithm value of oil-water (octanol/water) partition coefficient not determined: not determined; Upper explosive limit (%, V/V): not determined; Lower explosive limit (%, V/V): not determined; Solubility: insoluble in water, slightly soluble in cold ethanol, easily soluble when heated. Slightly soluble in acetone and benzene, easily soluble in ether, chloroform, hot ethanol, carbon tetrachloride and carbon disulfide.
Stearic acid calculates chemical data. What is stearic acid and how to store it? Calculation reference value of drainage parameter (XlogP): 7.4; Number of hydrogen bond donors: 1; Number of hydrogen bond receptors: 2; Number of rotatable chemical bonds: 16; Number of tautomers: topological molecular polar surface area (TPSA): 37.3; Number of heavy atoms: 20; Surface charge: 0; Complexity: 202; Number of isotope atoms: 0; Determine the quantity in the atomic structure: 0; Quantity in uncertain atomic structure: 0; Determine the quantity in the chemical bond structure: 0; Quantity in uncertain chemical bond structure: 0; Number of covalent bond units: 1
Many people ask where to buy where it is cost-effective? It is not enough to just look at the brand. It needs to be determined according to different groups. In terms of the products to be used, the manufacturers we should choose must be clear eyed and not blindly choose. What is stearic acid? How to store it? The properties of stearic acid, storage method and physical and chemical properties should be understood. If you have any questions, you can contact Keita customer service directly.