Hydroquinone USP Coumarin and Derivatives Test Specification Min Max ASSAY

Test Specification Min Max ASSAY [(NH[@2@]OH)[@2@][-H[@2@]SO[@4@]] 98

Test Specification Min Max ASSAY 70 - 75% 70 - 75% pH OF A 10% SOLUTION 8

5 pH OF A 1% SOLUTION 4

00% ACIDS AND ESTERS (as AMYL ACETATE) 0

Hydroquinone USP Coumarin and Derivatives Test Specification Min Max ASSAYTest Specification Min Max ASSAY (ANHYDROUS BASIS) 99 100. 50% MELTING RANGE 172?? 174?? RESIDUE ON IGNITION 0. 50% WATER DETERMINATION 0. 50% ELEMENTAL IMPURITIES AS REPORTED AS REPORTED IDENTIFICATION (A) TO PASS TEST TO PASS TEST IDENTIFICATION (B) TO PASS TEST TO PASS TEST IDENTIFICATION (C) TO PASS TEST TO PASS TEST RETEST DATE DATE OF MANUFACTURE APPEARANCE RESIDUAL SOLVENTS TO PASS TEST TO PASS TEST