Assay(as C₄H₄O₄)

99.5%~100.5%(anhydrous basis)

Melting Point

294℃~300℃

Arsenic(as As)

3mg/kg Max

Heavy Metals(as Pb)

10mg/kg Max

Maleic Acid

0.10% Max

Residue on Ignition

0.1% Max

Water

0.5% Max