Specification Sheet
Product Name 2-Phospho-L-ascorbic acid trisodium salt,
≥95.0% (HPLC)
Product Number 49752
Product Brand SIGMA
CAS Number 66170-10-3
Molecular Weight 322.05 (anhydrous basis)
 
TEST SPECIFICATION
APPEARANCE (COLOR) White to Off White
APPEARANCE (FORM) Powder
PURITY (HPLC AREA %) ≥ 95.0 %
SOLUBILITY (COLOR) Colorless to Faint Yellow
SOLUBILITY (TURBIDITY) Clear
SOLUBILITY (METHOD) 0.3G IN 10ML WATER
PH 9.0 - 9.5
WATER ≤ 7.5 %
INFRARED SPECTRUM CONFORMS TO STRUCTURE
METAL TRACE ANALYSIS (ICP) CORRESPONDS TO REQUIREMENTS
ALUMINIUM (ICP) ≤ 10 mg/kg
BARIUM (ICP) ≤ 5.0 mg/kg
CADMIUM (ICP) ≤ 5.0 mg/kg
COBALT (ICP) ≤ 5.0 mg/kg
CHROMIUM (ICP) ≤ 5.0 mg/kg
COPPER (ICP) ≤ 5.0 mg/kg
IRON (ICP) ≤ 10 mg/kg
MAGNESIUM (ICP) ≤ 10 mg/kg
MANGANESE (ICP) ≤ 5.0 mg/kg
MOLYBDENUM (ICP) ≤ 5.0 mg/kg
NICKEL (ICP) ≤ 5.0 mg/kg
LEAD (ICP) ≤ 5.0 mg/kg
STRONTIUM (ICP) ≤ 5.0 mg/kg
ZINC (ICP) ≤ 5.0 mg/kg
ARSENIC TRACES (MHS-AAS) ≤ 2.0 mg/kg
TOTAL SULFUR AS SO4 (ICP) ≤ 50 mg/kg
CHLORIDE (CL) ≤ 50 mg/kg