Butylated Hydroxy Anisole (BHA)

Introduction:
BHA is predominately 3-tert-butyl-4-hydroxyanisole (3-BHA), with varying amounts of 2-tert-butyl-4-hydroxyanisole (2-BHA). it occurs as a white or slightly yellow, waxy solid having a faint characteristics odor. It is insoluble in water, but is freely soluble in alcohol and in propylene glycol. it melts between 480c and 630C.

Chemical Name:	Butylated Hydroxy Anisole
Structural Formula:
Formula wt.:	180.25

Requirements:
Identification to 5 ml of a 1 in 10,000 solution of the sample in 72% alcohol add 2 ml of sodium borate TS and 1 ml of a 1 in 10,000 solution of 2,6-dichloroquinonechlorimide in absolute alcohol and mix. A blue color develops.

Tests:
Assay	:	not less than 98.5% of C11H16O2
Heavy Metals (as Pb)	:	not more than 10 mg/Kg
Residue on Ignition	:	not more than 0.05%

Storage:
Store in well-closed container.