PIVALIC ACID

PRODUCT IDENTIFICATION

75-98-9

200-922-5

102.13

H.S. CODE

2915.90

TOXICITY

2,2-Dimethyl Propionic acid; Dimethylpropionic acid;

alpha,alpha-Dimethyl Propionic acid, tert-Pentanoic Acid; Neopentanoic acid; Trimethylacetic acid; 2,2-Dimethylpropanoic acid; Trimethyl Acetic acid; 2,2-dimethylpropionova Kyselina; Kyselina pivalova;

CLASSIFICATION

PHYSICAL AND CHEMICAL PROPERTIES

White crystalline semi-solid

163 - 164 C

REFRACTIVE INDEX

63 C

GENERAL DESCRIPTION & APPLICATIONS

Pivalic acid is the shortest chain tert-carboxylic acid. Atoms within a molecule occupy space. When atoms are crowded together and overlapped electron clouds, van der Waals repulsions produce steric hindrance. Steric hindrance may influence conformational equilibria and reactivity. Although steric hindrance is sometimes a unfavorable structure due to less readily reaction, it can provide an escape from undesired side-reactions, can affect varying degrees of rate and energy and can produce the target derivatives which are more resistant to hydrolysis and oxidation than the derivatives from linear chain. Pivalic acid is a key intermediate for the target molecules which require hydrolytic stability and a variety of chemical resistance. Pivalic acid is used mainly in the form of chloride salt (pivaloyl chloride) which are obtained commercially from phosgene. It is used as an intermediate in the production of peroxides and peroxy-esters required for the polymer and agrochemical production. It is used as an intermediate to prepare pharmaceuticals ( Ampicillin, Amoxycillin, Cephalosporins). 2,2-Dimethylbutyric acid is the next shortest chain tert-carboxylic acid which have similar application with pivalic acid.

APPEARANCE

White crystalline semi-solid

99.0% max

WATER

0.1% max

ACID VALUE

545 mg KOH/kg