Sodium sulfite
SIGALD/239321 - ACS reagent, ≥98.0%
CAS Number: 7757-83-7
Empirical Formula (Hill Notation): Na2O3S
Molecular Weight: 126.04
EC Number: 231-821-4
MDL Number: MFCD00003503
Linear Formula: Na2SO3
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 239321-500G
This image depicts SKU: 239321-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 239321-2.5KG
This image depicts SKU: 239321-2.5KG
| anion traces | chloride (Cl-): ≤0.02% |
| assay | ≥98.0% |
| cation traces | Fe: ≤0.001% |
| heavy metals (as Pb): ≤0.001% | |
| form | powder or crystals |
| grade | ACS reagent |
| impurities | Free acid, passes test |
| ≤0.005% insolubles | |
| ≤0.03 meq/g Titr. free base | |
| InChI | 1S/2Na.H2O3S/c;;1-4(2)3/h |
| InChI key | GEHJYWRUCIMESM-UHFFFAOYSA |
| pH | 9.0-10.5 (25 °C, 126 g/L) |
| Quality Level | 200  |
| SMILES string | [Na+].[Na+].[O-]S([O-])=O |
| solubility | water: soluble 126 g/L at 20 °C |
| Application: | Sodium sulfite can be used: • As a reducing agent in the hydroxylation of arylboronic acids and arylboronic esters into corresponding phenols. • In the transformation of α-amino alcohol methanesulfonate hydrochlorides to sodium α-amino alkanesulfonates. • As a SO2 precursor in the multigram synthesis of DABCO·(SO2)2 abbreviated as DABSO. |
| General description: | Sodium sulfite is a water-soluble inorganic salt that is commonly used as a reducing agent. It is also used for sulfonation and sulfomethylation reactions. Additionally, it is used in the textile industry as a bleaching, de-sulfurizing, and dechlorinating agent. As an oxygen and free chlorine scavenger, Na2SO3 is employed in the water treatment process. Sodium sulfite participates in the purification and isolation of aldehydes and ketones by forming adducts with them. Other uses include the production of sodium thiosulfate, detergents, and dyes. |
| Packaging: | 2.5 kg in poly bottle |
| Packaging: | 500 g in poly bottle |
| Risk Statements | 31 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Supplemental Hazard Statements | EUH031 |
| Purity | ≥98.0% |
| UNSPSC | 12352300 |