all-trans-retinoic acid

Item

Specification

Test result

Description

Yellow crystalline powder

Yellow crystalline powder

Identification

The IR absorption spectrum should correspond

with reference  spectrum

Correspond

with reference  spectrum

Should exhibits maximum absorption at 352nm

Exhibits maximum absorption at 352nm

Loss on drying

Not more than 0.5%

0.1%

Residue on ignition

Not more than 0.1%

0.03%

Heavy metals

Not more than 0.002%

Less than 0.002%

Limit of Isotretinoin

Not more than 5.0%

0.04%

Assay

97.0%~103.0 %( Calculated on the dried basis)

100.1%