Appearance: White crystalline powder

Empirical Formula: C₁₂H₁₆O₇

Molecular Weight: 272.25

Assay: ≥ 99.5%

Melting Point: 199℃～201℃±0.5℃

Clarity Of Water Solution:   Transpency,colorless,none suspended matters

PH Value of 1% Aqueous Solution: 5.0～7.0

Specific Optical Rotation:  [ɑ]D 20= -66º±2º

Infrared Peak Value: 1515cm-1 1220 cm-1 1050 cm-1 ±(5～8) cm-1

Arsenic: ≤ 2PPM

Hydroquinone: ≤ 10PPM

Heavy Metals: ≤ 10PPM

Loss On Drying: ≤ 0.5%

Ignition Residue: ≤ 0.5%

Pathogen:  

Bacteria ≤300CPU  

Fungus ≤100CPU