Sulfurous acid AR Grade is commonly used in the food industry as an antioxidant and preservative. CAS 7782-99-2 EC 231-974-0| Chemical Reagents net

Sulfite is a commonly used chemical reagent and is widely used in laboratory and industry.

General information

EC Number: 231-974-0
CAS Number: 7782-99-2
MDL Number: MFCD00011335
Molecular Formula: H2O3S
Molecular Weight: 82.08

Brand: KeShi
Packaging: 5 kg per drum

Physical Properties

Appearance: Colorless to pale yellow liquid
Density: 1.03 g/cm³
Boiling Point: 157 °C (decomposes)

Chemical Properties

Solubility: Soluble in water, forming sulfurous acid solution
Acidity: It is a moderately strong acid

   HO-S(=O)-OH

Quality inspection report

| Product Name        | Sulfurous Acid             |
| Specification       | Analytical Grade           |
| Batch Number        | 2023100701                 |
| Molecular Formula   | H2SO3                      |
| Molecular Weight    | 82.08                      |
| Batch Size          | 180kg                      |
| Testing Unit        | Production Department      |
| Sample Category     | Inorganic                  |
| Report Date         | October 9, 2023            |
| Testing Standard    | Q/CDKLHX0408-2016A         |

| Test Item           | Standard Requirement       | Test Result     |
|---------------------|----------------------------|-----------------|
| Content (as SO2), % | ≥6.0                       | 7.9             |
| Appearance          | Colorless transparent liquid | Colorless transparent liquid |
| Ash Residue, %      | ≤0.005                     | 0.002           |
| Chloride (Cl), %    | ≤0.0005                    | ＜0.0005         |
| Arsenic (As), %     | ≤0.00003                   | ＜0.00003        |
| Iron (Fe), %        | ≤0.0003                    | ＜0.0003         |
| Heavy Metals (as Pb), % | ≤0.0002                | ＜0.0002         |

Analysis Conclusion:
Meets the requirements of Q/CDKLHX0408-2016A for analytical grade.

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