BUTYLATED HYDROXYANISOLE.

A monograph for the pharmaceutical substance "BUTYLHYDROXYANISOLUM/BUTYLATED HYDROXYANISOLE" from the fourth edition of "The International Pharmacopoeia" is presented. Butylated hydroxyanisole is categorized as an antioxidant and described as a white or almost white crystalline powder or a yellowish white solid, that is freely soluble in water and methanol R. It is recommended that this substance be kept in a tightly closed container. Procedures for performing an identity test and assay of the substance are described.