Item

Unit

Specification

Assay (asC4 H4O4)

wt %

99.5~100.5

Arsenic (As)

mg/kg

2 max

Lead

wt%

2max

Maleic acid

wt%

0.1 max

Mosture

wt%

0.5 max

Residue on ignition

wt%

01 max

Appearance

             /

White crystal powder