Stearic Acid

Cas No: 57-11-4           
EINESC No: 200-313-4
Molecular weight: 284.484 g/mol  

Chemical Formula: C2H4
Chemical Structure:

Physical Properties

General Properties: White solid

Odor: Strong, oil-like

Intensity: 0,9408 g/cm3

Boiling point: 361 °C

Melting point:  69,3 °C

Flash point: 113 °C

Vapor pressure: 0,01 kPa (158 °C)

Refraction index: 1,4299 nD (80°C)

Solubility : 0,00029 g/100 g (20 °C)

General Properties

Stearic acid is a saturated fat acid which consists of 18-carbon chain. Its salts and esters are called stearates. It is one of the most commonly found saturated fat acids. Stearin is the term for triglyceride that is produced from three stearic acid molecules. Stearic acid is used as softening agent as it possesses a non-polar chain that can cling to metal cations. Therefore, it allows to dissolve in organic solvents. It demonstrates corboxylic characteristics when it is in reaction.


Stearic acid is produced through saponification and distillation of fat via boiling-level waters of triglycerides. Stearic acid is a mixture of palmitic acid and stearic acid and it is generally used for trading purposes.


Stearic acid is commonly used as food additive substance. It is also used in soap, detergent productions and cosmetic business. It is used as greaser and softener in rubber and pvc productions.

It is also commonly used in lube oil and certain oil additive substance productions.

Safety Measures and Toxic Values

Stearic acid is classified as hazardous material by the European Union. It is only flammable in high temperatures. It may be irritant in case of eye or skin contact.