217247
Sodium thiosulfate pentahydrate
ACS reagent, ≥99.5%
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About This Item
Linear Formula:
Na2S2O3 · 5H2O
CAS Number:
Molecular Weight:
248.18
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
231-867-5
MDL number:
Assay:
≥99.5%
Grade:
ACS reagent
Form:
crystalline powder, crystals, pellets
Solubility:
water: soluble(lit.)
grade
ACS reagent
Quality Level
agency
suitable for EPA 1621, suitable for ISO 25101, suitable for SM 2310, suitable for SM 2320, suitable for SM 4500 - NH3
assay
≥99.5%
form
crystalline powder, crystals, pellets
impurities
≤0.002% N compounds, ≤0.005% insolubles
pH
6.0-8.4 (25 °C, 5%)
solubility
water: soluble(lit.)
anion traces
S2-: passes test, SO42- and SO32-: ≤0.1%
cation traces
N: ≤0.002%
application(s)
PFAS testing
SMILES string
O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=S
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
General description
Sodium thiosulfate pentahydrate is a hydrated form of sodium thiosulfate. It is used as a sulfur source for the preparation of various organosulfur compounds.
Application
Applied in a widely useful, thiosulfate-assisted, synthesis of a variety of diamine-CuCN complexes.
Sodium thiosulfate pentahydrate can be used as a sulfur source to synthesize:
It can also be used in the fabrication of microencapsulated phase change materials for thermal energy storage applications.
- Thioester derivatives via one-pot two-step reactions with organic halides and aryl anhydrides.
- Sulfur nanoparticles using F. benghalensis leaf extract which acts as a reducing and capping agent.
- Unsymmetrical heteroaryl thioethers via multicomponent reaction with heteroaryl chlorides and alcohols.
It can also be used in the fabrication of microencapsulated phase change materials for thermal energy storage applications.
Features and Benefits
Na2S2O3 5H2O is a low toxic and odorless reagent that can be easily used in large-scale operations.
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Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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Nuclear magnetic resonance in sodium thiosulfate pentahydrate.
Murty CRK and El Saffar ZM.
Acta Crystallographica, 15(6), 536-538 (1962)
Sodium thiosulfate pentahydrate: a redetermination by neutron diffraction.
Lisensky GC and Levy HA.
Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials, 34(6), 1975-1977 (1978)
Fingerprint imaging by scanning electrochemical microscopy.
Zhang M and Girault HH.
Electrochemical Communications, 9(7), 1778-1782 (2007)