Specification Sheet

Product Name
Sodium metabisulfite puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

Product Number
13459

Product Brand
SIGALD

CAS Number
7681-57-4

Molecular Weight
190.11

Test

Specification

APPEARANCE (COLOR)Colorless or White
APPEARANCE (FORM)Powder or Crystals
REDOX TITRATION97 - 100.5 %
ASSAY65.0 - 67.4 % SO2
SOLUBILITY (COLOR)complying
SOLUBILITY (TURBIDITY)complying
SOLUBILITY (METHOD)ACC. TO PH.EUR.
PH3.5 - 5.0 (10% solution)
PH-TEST3.5 - 5.0
PH (METHOD)5 %, 20C
PHARMACOPOEA TESTSCORRESPONDS TO REQUIREMENTS
Remarks on Pharmakopoea Testheavy metals (as Pb) ≤ 10 mg/kg-br-thiosulfate (S2O3) complying
COPPER (ICP)≤ 10 mg/kg
IRON (ICP)≤ 10 mg/kg
LEAD (ICP)≤ 2 mg/kg
ZINC (ICP)≤ 10 mg/kg
ARSENIC TRACES (MHS-AAS)≤ 2 mg/kg
MERCURY TRACES (AFS)≤ 1 mg/kg
SELENIUM TRACES (MHS-AAS)≤ 5 mg/kg
CHLORIDE (CL)≤ 100 mg/kg
THIOSULFATE (S2O3)≤ 200 mg/kg
RESIDUAL SOLVENTS (GLC-HS)Complying