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1.06657 Supelco

Sodium sulfite

anhydrous for analysis EMSURE® Reag. Ph Eur

Synonym: Sodium sulfite

  • CAS Number 7757-83-7

  • Empirical Formula (Hill Notation) Na2O3S

  • Molecular Weight 126.04

  •  MDL number MFCD00003503

  •  EC Index Number 231-821-4

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Properties

Agency/Method   reag. Ph. Eur.
Quality Level   300
assay   97.0-100.5% (iodometric)
form   powder
potency   2610 mg/kg LD50, oral (Rat)
pH   8.8-10 (20 °C, 50 g/L in H2O)
mp   >500 °C (decomposition)
density   2.63 g/cm3 at 20 °C
bulk density   1480 kg/m3
anion traces   chloride (Cl-): ≤0.02%
  thiosulfate (S2O32-): ≤0.1%
cation traces   As: ≤ 0.0001%
  Cu: ≤ 0.0005%
  Fe: ≤ 0.001%
  Pb: ≤ 0.0005%
  Se: ≤ 0.0004%
  Zn: ≤ 0.001%
  heavy metals (as Pb): ≤ 0.0005%
InChI   1S/2Na.H2O3S.7H2O/c;;1-4(2)3;;;;;;;/h;;(H2,1,2,3);7*1H2/q2*+1;;;;;;;;/p-2
InChI key   WMJRPJZQQSSDBU-UHFFFAOYSA-L
storage conditions   Store at +5°C to +30°C.

Description

Analysis Note

Assay (iodometric): 97.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.005 %
Free acid: passes test
Titrable free base: ≤ 0.03 meq/g
Chloride (Cl): ≤ 0.02 %
Thiosulfate (S₂O₃): ≤ 0.1 %
Heavy metals (as Pb): ≤ 0.0005 %
As (Arsenic): ≤ 0.0001 %
Cu (Copper): ≤ 0.0005 %
Fe (Iron): ≤ 0.001 %
Pb (Lead): ≤ 0.0005 %
Se (Selenium): ≤ 0.0004 %
Zn (Zinc): ≤ 0.001 %

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.
Protocols & Articles

Articles

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