Adipic Acid

Cas Number


Other Names

Adipic acid

Hexane-1,6-dicarboxylic acid

Hexane-1,6-dioic acid

1,4-butanedicarboxylic acid

The formula



Adipic acid or hexanedioic acid is the organic compound with the formula (CH2)4(COOH)2. From an industrial perspective, it is the most important dicarboxylic acid: About 2.5 billion kilograms of this white crystalline powder are produced annually, mainly as a precursor for the production of nylon. Adipic acid otherwise rarely occurs in nature.

Physical and Chemical Properties
Physical state and appearance Solid. (Crystalline powder.)
Odor Odorless.
Molecular Weight 146.14 g/mole
Color White
Boiling Point 337.5°C (639.5°F)
Flash point 196 °C
Melting Point 152°C (305.6°F)
Specific Gravity 1.36 (Water = 1)
Vapor Density 5.04 (Air = 1)
Dispersion Properties See solubility in water, methanol, acetone
Solubility Easily soluble in methanol. Soluble in hot water, acetone. Partially soluble in cold water. Insoluble in Acetic acid, Petroleum Benzin, Benzene, Petroleum Ether.
H2O,% 0.20 max
ASH,PPM 5 max
IRON, ppm 1 max

1. Small but significant amounts of adipic acid are used as a food ingredient as a flavorant and gelling aid. It is used in some calcium carbonate antacids to make them tart

2. It is used in making polyester polyols for polyurethane systems. Food grade adipic acid is used as gelling aid, acidulant, leavening and buffering agent

3. Adipic acid has two carboxylic acid, -COOH, groups, which can yield two kinds of salts. Its derivatives, acyl halides, anhydrides, esters, amides and nitriles, are used in making target products such as flavoring agents, internal plasticizers, pesticides, dyes, textile treatment agents, fungicides, and pharmaceuticals through further reactions of substitution, catalytic reduction, metal hydride reduction, diborane reduction, keto formation with organometallic reagents, electrophile bonding at oxygen, and condensation

4. It is useful in a variety of industrial applications which includes Plasticizer for polymers, Biodegradable solvents and lubricants, Engineering plastics, Epoxy curing agent, Adhesive and powder coating, Corrosion inhibitor, Perfumery and pharmaceutical, Electrolyte etc