Description

White crystalline granule or powder

Assay(as C4H6O5)

99.0%~100.5%

Specific rotation [α]D 25℃

-0.10°~ +0.10°

Heavy Metals(as Pb)

10mg/kg max

Fumaric acid

1.0% max

Residue on Ignition

0.1% max

Maleic acid

0.05% max

Water-insoluble Matter

0.1% max

Arsenic (as As2O3)

4mg/kg max

Sulphate

300mg/kg max

Chloride

100mg/kg max

Initial melting point

127.0 ℃min