Determine the necessary mass, volume, or concentration for preparing a solution.
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SO2 content ≥ 58.5% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature,Desiccated Ships FedEx DG Service Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 241 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
| Pubchem Sid | 504769515 |
|---|---|
| Pubchem Sid Url | https://pubchem.ncbi.nlm.nih.gov/substance/504769515 |
| Canonical Smiles | OS(=O)[O-].[Na+] |
| IUPAC Name | sodium;hydrogen sulfite |
| InChIKey | DWAQJAXMDSEUJJ-UHFFFAOYSA-M |
| INCHI | 1S/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 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Inorganic compounds |
|---|---|
| Superclass | Mixed metal/non-metal compounds |
| Class | Alkali metal oxoanionic compounds |
| Subclass | Alkali metal sulfites |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Alkali metal sulfites |
| Alternative Parents | Inorganic sodium salts Inorganic oxides |
| Molecular Framework | Not available |
| Substituents | Alkali metal sulfite - Inorganic sodium salt - Inorganic oxide - Inorganic salt |
| Description | This 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 |
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Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
| Certificate of Analysis | Sep 30, 2026 | S598869 | |
| Certificate of Analysis | Sep 16, 2026 | S598869 | |
| Certificate of Analysis | May 30, 2026 | S598869 | |
| Certificate of Analysis | Nov 06, 2025 | S598869 | |
| Certificate of Analysis | Nov 06, 2025 | S598869 | |
| Certificate of Analysis | Sep 18, 2025 | S598869 | |
| Certificate of Analysis | Sep 18, 2025 | S598869 | |
| Certificate of Analysis | Jun 28, 2025 | S598869 | |
| Certificate of Analysis | Jun 28, 2025 | S598869 | |
| Certificate of Analysis | Nov 18, 2024 | S598869 | |
| Certificate of Analysis | Nov 18, 2024 | S598869 | |
| Certificate of Analysis | Nov 18, 2024 | S598869 | |
| Certificate of Analysis | Nov 18, 2024 | S598869 | |
| Certificate of Analysis | Sep 05, 2023 | S598869 | |
| Certificate of Analysis | Sep 05, 2023 | S598869 | |
| Certificate of Analysis | Sep 05, 2023 | S598869 | |
| Certificate of Analysis | Sep 05, 2023 | S598869 |
| Sensitivity | Moisture sensitive,Hygroscopic |
|---|---|
| Molecular Weight | 104.060 g/mol |
| XLogP3 | |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 0 |
| Exact Mass | 103.954 Da |
| Monoisotopic Mass | 103.954 Da |
| Topological Polar Surface Area | 79.600 Ų |
| Heavy Atom Count | 5 |
| Formal Charge | 0 |
| Complexity | 33.900 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 2 |