Sodium bisulfite - SO2 content ≥ 58.5% , CAS No.7631-90-5

CAS: 7631-90-5 Cat. No.: S598869 Formula: NaHSO3 Molecular Weight: 104.06 EC Number: 231-548-0 PubChem CID: 23665763
AVAILABLE TO ORDER
GRADE & PURITY SO2 content ≥ 58.5%
Synonyms
SODIUM BISULFITE|7631-90-5|Sodium hydrogen sulfite|Sodium bisulphite|sodium hydrogensulfite|Monosodium sulfite|Sulfurous acid, monosodium salt|Sodium sulhydrate|Uantax SBS|Caswell No. 750|Hydrogen sulfite sodium|sodium hydrogen sulphite|Monosodic sulphite
Storage
Room temperature,Desiccated
Shipped In
FedEx DG Service
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Size
USA
Germany (EU)*
Price
Qty
500g
S598869-500g
2 In stock
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$15.90

$18.90
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Why this grade

SO2 content ≥ 58.5% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Desiccated Ships FedEx DG Service Check lot-specific COA for exact specifications.

📋

Quality documents

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

📚

Literature proof

Cited in 241 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
SODIUM BISULFITE | 7631-90-5 | Sodium hydrogen sulfite | Sodium bisulphite | sodium hydrogensulfite | Monosodium sulfite | Sulfurous acid, monosodium salt | Sodium sulhydrate | Uantax SBS | Caswell No. 750 | Hydrogen sulfite sodium | sodium hydrogen sulphite | Monosodic sulphite
Specifications & Purity
SO2 content ≥ 58.5%
Storage
Room temperature,Desiccated
Shipped In
FedEx DG Service
Names and Identifiers
Pubchem Sid504769515
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504769515
Canonical SmilesOS(=O)[O-].[Na+]
IUPAC Namesodium;hydrogen sulfite
InChIKeyDWAQJAXMDSEUJJ-UHFFFAOYSA-M
INCHI1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1
Isomeric SMILES OS(=O)[O-].[Na+]
WGK Germany 1
PubChem CID 23665763
UN Number 3260
Packing Group I
Molecular Weight 104.06

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





Associated Targets(Human)
CA2 Tclin Carbonic anhydrase II (17698 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
TYR Tclin Tyrosinase (717 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
CA1 Tclin Carbonic anhydrase I (13240 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Associated Targets(non-human)
Carbonic anhydrase (69 Activities)
Activity TypeRelationActivity valueUnitsAction TypeJournalPubMed IddoiAssay Aladdin ID
Trypanosoma cruzi (99888 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.

17 results found

Lot NumberCertificate TypeDateItem
I2604596Certificate of AnalysisSep 30, 2026 S598869
I2604581Certificate of AnalysisSep 16, 2026 S598869
E2626139Certificate of AnalysisMay 30, 2026 S598869
K2504601Certificate of AnalysisNov 06, 2025 S598869
K2504600Certificate of AnalysisNov 06, 2025 S598869
I2512409Certificate of AnalysisSep 18, 2025 S598869
I2512407Certificate of AnalysisSep 18, 2025 S598869
F2519671Certificate of AnalysisJun 28, 2025 S598869
F2519673Certificate of AnalysisJun 28, 2025 S598869
K2411494Certificate of AnalysisNov 18, 2024 S598869
K2411512Certificate of AnalysisNov 18, 2024 S598869
K2411527Certificate of AnalysisNov 18, 2024 S598869
L2502009Certificate of AnalysisNov 18, 2024 S598869
H2328153Certificate of AnalysisSep 05, 2023 S598869
E2422119Certificate of AnalysisSep 05, 2023 S598869
H2328152Certificate of AnalysisSep 05, 2023 S598869
H2328151Certificate of AnalysisSep 05, 2023 S598869
Chemical and Physical Properties
SensitivityMoisture sensitive,Hygroscopic
Molecular Weight104.060 g/mol
XLogP3
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count4
Rotatable Bond Count0
Exact Mass103.954 Da
Monoisotopic Mass103.954 Da
Topological Polar Surface Area79.600 Ų
Heavy Atom Count5
Formal Charge0
Complexity33.900
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 Count2
Documents & Articles
Radical Initiator Selection Guide
Protein Tris-Acetate Electrophoresis System Standard Operating Procedure
A Practical Guide to Fragrance Compositions: Turning a Black-Box Formula into an Engineerable System—Compatibility, Stability, Controlled Release, Traceability, and Selection
TEMPO-Catalyzed Oxidation Quick Reference (Alcohol Oxidation Focus): Three Regeneration Routes (NaOCl / Cu–O₂ / PIDA) + Selection & Troubleshooting
Ferulic Acid: Structural Features, Preparation Routes, and Key Points for Research Applications
Physicochemical Properties of Diphenylamine, Analytical Applications, and a Review of Its DNA Colorimetric Reaction
Glutaraldehyde-mediated Microbial Inactivation: Chemical Mechanisms, Determinants, and Key Validation Considerations
Adding a Temperature-Triggered Switch to NCO: How Blocked Isocyanates Affect the Storage, Curing, and Film Performance of 1K Baking Coatings
Waterborne Resin Technology Explained: Waterborne Forms, Performance Balance, and a Technology Map
If the DNA Sequence Remains Unchanged, Why Does Gene Expression Change? Core Mechanisms and Research Methods of Epigenetic Regulation
One-Pot Deaminative Cyanation of Arylamines Mediated by Nitrate Reduction: The ORT Pathway and Kinetic Matching of Tandem Reaction Steps
Principles, Method Comparison, and Sample Analysis Applications of Colorimetric Formaldehyde Detection
Regulatory Mechanisms of 5mC DNA Methylation
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

How should this product be stored?
Store at room temperature, desiccated. Keep the container tightly closed with desiccant — the material is moisture-sensitive.
How is this product shipped?
This product is classified as dangerous goods and ships via FedEx DG Service. Ground and other economy services are not available, and delivery to some destinations or address types may be restricted.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 7631-90-5, the molecular formula is NaHSO3, and the molecular weight is 104.06 g/mol. InChIKey DWAQJAXMDSEUJJ-UHFFFAOYSA-M.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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