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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Reference substances

Reference substances

Currently viewing:
IUPAC name:
sodium thiosulphate

Inventory

EC number:
231-867-5
EC name:
Sodium thiosulphate
CAS number:
7772-98-7
CAS number:
7772-98-7
Synonyms
Names:
Thiosulfuric acid (H2S2O3), disodium salt
Identifier:
CAS number
10102-17-7
Identifier:
IUPAC name
Sodium thiosulphate
Identifier:
IUPAC name
disodium sulfanidesulfonate
Identifier:
other: Molecular formula
Na2S2O3
Identifier:
other: Molecular formula
Na2S2O3· 5H2O
disodium thiosulfate

Molecular and structural information

Molecular formula:
H2O3S2.2Na
Molecular weight:
158.11
SMILES notation:
[Na+].[Na+].[O-]S(=O)(=O)[S-]
InChl:
InChI=1/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
Structural formula:
Chemical structure

Related substances

Identifier:
CAS number
Identity:
10102-17-7