Sodium thiosulfate - Anhydrous Grade, ≥94%(RT) , CAS No.7772-98-7

CAS: 7772-98-7 Cat. No.: S597648 Formula: Na2S2O3 Molecular Weight: 158.11 EC Number: 231-867-5
AVAILABLE TO ORDER
GRADE & PURITY Anhydrous Grade ? Anhydrous grade — water removed and packaged dry for moisture-sensitive chemistry. Use in reactions where even trace water would interfere or quench. ≥94%(RT)
Synonyms
EINECS 231-867-5 | sodium thiosulfate (anhydrous) | HSDB 592 | BP-21059 | Na2S2O3 | SODIUM THIOSULFATE [WHO-DD] | DTXCID4024197 | E-539 | L0IYT1O31N | DTXCID7022417 | Sodium thiosulphate, anhydrous | Chlorine Control | Ins no.539 | Sodium oxide sulfide |
Storage
Room temperature
Shipped In
Normal
★
Size
Germany (EU)
USA*
Price
Qty
250g
S597648-250g
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3 In stock
€17.27
500g
S597648-500g
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2 In stock
€29.42
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Why this grade

Anhydrous Grade, ≥94%(RT) Anhydrous Grade for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 480 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

The product is anhydrous sodium thiosulfate (Na 2 S 2 O 3 ). It can be obtained from Na 2 S 2 O 3 .10H 2 O by heating above 100°C. It can be synthesized from sodium sulfate.


Application

Sodium thiosulfate (Na 2 S 2 O 3 ) may be used in the following studies: Industrial synthesis of methylene blue. Quantitative estimation of elemental iodine by titrimetry. Detection of trace levels of cysteine by employing triangular silver nanoplates (TAg-NPs).

Specifications

Synonyms
EINECS 231-867-5 | sodium thiosulfate (anhydrous) | HSDB 592 | BP-21059 | Na2S2O3 | SODIUM THIOSULFATE [WHO-DD] | DTXCID4024197 | E-539 | L0IYT1O31N | DTXCID7022417 | Sodium thiosulphate, anhydrous | Chlorine Control | Ins no.539 | Sodium oxide sulfide |
Specifications & Purity
Anhydrous Grade, ≥94%(RT)
Storage
Room temperature
Shipped In
Normal
Grade
Anhydrous Grade
Purity
≥94%(RT)
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/504753213
Canonical Smiles
[O-]S(=O)(=S)[O-].[Na+].[Na+]
IUPAC Name
disodium;dioxido-oxo-sulfanylidene-λ6-sulfane
InChIKey
AKHNMLFCWUSKQB-UHFFFAOYSA-L
INCHI
1S/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
Isomeric SMILES
[O-]S(=O)(=S)[O-].[Na+].[Na+]
Molecular Weight
158.11

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomInorganic compounds
SuperclassMixed metal/non-metal compounds
ClassAlkali metal oxoanionic compounds
SubclassAlkali metal thiosulfates
Intermediate Tree Nodes Not available
Direct ParentAlkali metal thiosulfates
Alternative Parents Inorganic sulfides  Inorganic sodium salts  Inorganic oxides  
Molecular FrameworkNot available
Substituents Alkali metal thiosulfate - Inorganic sodium salt - Inorganic oxide - Inorganic sulfide - Inorganic salt
DescriptionThis compound belongs to the class of inorganic compounds known as alkali metal thiosulfates. These are inorganic compounds in which the largest oxoanion is thiosulfate, and in which the heaviest atom not in an oxoanion is an alkali metal.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Associated Targets(non-human)
Pseudomonas aeruginosa (123386 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Staphylococcus aureus (210822 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

21 results found

Lot NumberCertificate TypeDateItem
L2315247Certificate of AnalysisSep 07, 2026 S597648
L2315231Certificate of AnalysisSep 07, 2026 S597648
I2614970Certificate of AnalysisAug 27, 2026 S597648
I2614969Certificate of AnalysisAug 27, 2026 S597648
I2614968Certificate of AnalysisAug 27, 2026 S597648
L2524615Certificate of AnalysisDec 13, 2025 S597648
L2523535Certificate of AnalysisDec 13, 2025 S597648
L2523534Certificate of AnalysisDec 13, 2025 S597648
H2505539Certificate of AnalysisJul 25, 2025 S597648
H2505527Certificate of AnalysisJul 25, 2025 S597648
H2505526Certificate of AnalysisJul 25, 2025 S597648
G2517079Certificate of AnalysisMar 13, 2025 S597648
D2501544Certificate of AnalysisMar 13, 2025 S597648
D2501543Certificate of AnalysisMar 13, 2025 S597648
D2501542Certificate of AnalysisMar 13, 2025 S597648
K2425031Certificate of AnalysisDec 05, 2024 S597648
K2405048Certificate of AnalysisDec 01, 2023 S597648
L2315232Certificate of AnalysisDec 01, 2023 S597648
L2315233Certificate of AnalysisDec 01, 2023 S597648
L2315234Certificate of AnalysisDec 01, 2023 S597648
B2518018Certificate of AnalysisDec 01, 2023 S597648
Chemical and Physical Properties
Boil Point(°C)100°C
Melt Point(°C)48°C
Molecular Weight158.110 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count4
Rotatable Bond Count0
Exact Mass157.908 Da
Monoisotopic Mass157.908 Da
Topological Polar Surface Area104.000 Ų
Heavy Atom Count7
Formal Charge0
Complexity82.600
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count3
Documents & Articles
Environmental conditions for storing laboratory chemicals
The Guide to Anhydrous Grade for Reagents
TEMPO-Catalyzed Oxidation Quick Reference (Alcohol Oxidation Focus): Three Regeneration Routes (NaOCl / Cu–O₂ / PIDA) + Selection & Troubleshooting
Methodological essentials for mineralization visualization: Alizarin Red S staining vs. Von Kossa silver staining
Technical Comparison and Method Selection for Hydroxyproline Determination
Elastic Fiber Staining Methods: Comparison of Orcein, Verhoeff, Weigert, and Victoria Blue Methods
Types of Inorganic Salts That Can Undergo Reduction Reactions: Nitrates, Sulfur-Containing Salts, Halogen Oxyanion Salts, and Metal Salts
Analysis of Classical Histological Special Staining Systems: Application Selection of PTAH, Masson, VG, Elastic Fiber Staining, and Reticular Fiber Staining
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

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