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Merck
CN

SX0820

Sodium Thiosulfate

anhydrous, GR

Synonym(s):

Sodium Thiosulfate, Hypo

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About This Item

Empirical Formula (Hill Notation):
Na2O3S2
CAS Number:
Molecular Weight:
158.11
UNSPSC Code:
12352302
EC Index Number:
231-867-5
MDL number:
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Product Name

Sodium Thiosulfate, anhydrous, GR

SMILES string

[Na+].[Na+].[S](=S)(=O)([O-])[O-].O.O.O.O.O

InChI

1S/2Na.H2O3S2.5H2O/c;;1-5(2,3)4;;;;;/h;;(H2,1,2,3,4);5*1H2/q2*+1;;;;;;/p-2

InChI key

PODWXQQNRWNDGD-UHFFFAOYSA-L

form

powder or crystals

pH

6.0-8.5 (20 °C, 50 g/L in H2O)

solubility

701 g/L

shipped in

ambient

storage temp.

room temp

Quality Level

Analysis Note

Assay: 97% min
Color: White
Form: Powder or crystals
Heavy metals (as Pb): 0.001% max
Insoluble matter: 0.01% max
Sulfide (S): 0.0001% max

Application

anhydrous, GR

Storage Class

10-13 - German Storage Class 10 to 13

Regulatory Information

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