Appearance: White to slight yellow oblique rhombohedral crystal,needle crystal or powder

Empirical Formula:  C₉H₁₆O₄

Molecular Weight: 188.22

Assay:≥ 99.0%

Appearance:Crystallization powder

Heavy Metals:≤ 0.001%

Water:≤ 0.03%

Arsenic:≤ 0.0005%

Assay(CL):≤ 0.002%

Water insoluble matter:≤ 0.003%

Assay(SO₄):≤ 0.015%

Assay(Fe):≤ 0.003%