Stearic Acid

Stearic acid is a saturated fatty acid with an 18-carbon chain and has the IUPAC name octadecanoic acid. It is a waxy solid and its chemical formula is C17H35CO2H. The salts and esters of stearic acid are called stearates. As its ester, stearic acid is one of the most common saturated fatty acids found in nature following palmitic acid. The triglyceride derived from three molecules of stearic acid is called stearin.

Parameter Value

CAS Number

57-11-4 

Chemical formula

C18H36O2

Molar mass

284.48 g·mol−1

Appearance

White solid

Odor

Pungent, oily

Density

0.9408 g/cm3 (20 °C)
0.847 g/cm3 (70 °C)

Melting point

69.3 °C (156.7 °F; 342.4 K) 

Boiling point

361 °C (682 °F; 634 K)
decomposes
232 °C (450 °F; 505 K)
at 15 mmHg

Solubility in water

0.003 g/L (20 °C)
0.34 g/L (25 °C)
1 g/L (37 °C)

Solubility

Soluble in alkyl acetates, alcohols, HCOOCH3, phenyls, CS2, CCl4

Website Designed and managed by MK Web Solutions