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72030 Sigma-Aldrich

Sodium tetrathionate dihydrate

purum p.a., ≥98.0% (T)

  • CAS Number 13721-29-4

  • Linear Formula NaO3SS2SO3Na · 2H2O

  • Molecular Weight 306.27

  •  MDL number MFCD00150868

  •  PubChem Substance ID 329762997

  •  NACRES NA.21

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Properties

Related Categories Chemical Synthesis, Essential Chemicals, Inorganic Salts, Research Essentials, Salts,
InChI Key   HAEPBEMBOAIUPN-UHFFFAOYSA-L
Quality Level   200
grade   purum p.a.
assay   ≥98.0% (T)
impurities   10.5-20.0% water (Karl Fischer)
solubility   H2O: 50 mg/mL, slightly turbid, colorless
density   2.1 g/mL at 25 °C (lit.)
anion traces   thiosulfate (S2O32-): ≤500 mg/kg
cation traces   Ca: ≤500 mg/kg
  Cd: ≤50 mg/kg
  Co: ≤50 mg/kg
  Cu: ≤50 mg/kg
  Fe: ≤50 mg/kg
  K: ≤100 mg/kg
  Ni: ≤50 mg/kg
  Pb: ≤50 mg/kg
  Zn: ≤50 mg/kg
storage temp.   2-8°C

Description

General description

Sodium tetrathionate dihydrate is the dihydrate of sodium tetrathionate. It has been synthesized from sodium thiosulfate by iodine oxidation. Its crystals exhibit monoclinic crystal system and space group C23-C2.

Application

Sodium tetrathionate dihydrate may be used to compose the 0.2M Tris buffer in a study.

Other Notes

Thiosulfating agent; it reacts with thiols, e.g. cysteine to S-sulfo-thiols, used in the quantitative determination of total cysteine/cystine in proteins; Reversible inactivation of enzymes

Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
RIDADR 
NONH for all modes of transport
WGK Germany 
3
RTECS 
XF6470000

Documents

Certificate of Analysis (COA)

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Single- & multi-channel pipettes from BRAND
Protocols & Articles
Peer-Reviewed Papers
15

References

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