| Specifications | |
|---|---|
| Assay (iodometric) | ≥ 96 % |
| In water insoluble matter | ≤ 0.005 % |
| Chloride (Cl) | ≤ 0.005 % |
| As (Arsenic) | ≤ 0.0001 % |
| Cu (Copper) | ≤ 0.001 % |
| Fe (Iron) | ≤ 0.0005 % |
| Pb (Lead) | ≤ 0.001 % |
| Zn (Zinc) | ≤ 0.001 % |
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Key Spec Table
| CAS # | EC Number | Hill Formula | Chemical Formula | Molar Mass |
|---|---|---|---|---|
| 16731-55-8 | 240-795-3 | K₂O₅S₂ | K₂S₂O₅ | 222.33 g/mol |
| Description | |
|---|---|
| Catalogue Number | 105057 |
| Synonyms | Potassium metabisulfite, Potassium pyrosulfite |
| Product Information | |
|---|---|
| CAS number | 16731-55-8 |
| EC number | 240-795-3 |
| Hill Formula | K₂O₅S₂ |
| Chemical formula | K₂S₂O₅ |
| Molar Mass | 222.33 g/mol |
| HS Code | 2832 20 00 |
| Applications | |
|---|---|
| Application | Potassium disulfite for analysis EMSURE®. Potassium disulfite CAS No. 16731-55-8, EC Number 240-795-3. Potassium disulfite MSDS (material safety data sheet) or SDS here. |
| Physicochemical Information | |
|---|---|
| Melting Point | 150 °C (decomposition) |
| pH value | 3.0 - 4.5 (50 g/l, H₂O, 20 °C) |
| Bulk density | 1000 - 1300 kg/m3 |
| Solubility | 450 g/l |
| Toxicological Information | |
|---|---|
| LD 50 oral | LD50 Rat 2300 mg/kg |
| Safety Information according to GHS | |
|---|---|
| Hazard Pictogram(s) |   |
| Hazard Statement(s) | H318: Causes serious eye damage. H335: May cause respiratory irritation. EUH031: Contact with acids liberates toxic gas. |
| Precautionary Statement(s) | P280: Wear eye protection. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P313: Get medical advice/ attention. |
| RTECS | TT4920000 |
| Storage class | 10 - 13 Other liquids and solids |
| WGK | WGK 1 slightly water endangering |
| Disposal | 6 Sulfides and sulfites as well as other reducing substances, inorganic cyanides and isonitriles: Stir into sodium hypochlorite solution (Cat. No. 105614) and, if necessary, leave to react for several days. Caution: some substances may show a violent reaction! Draw off any toxic or flammable gases that may be formed. Excess oxidant should be neutralized with sodium thiosulfate (Cat. No. 106513). Container D or E. |
| Safety Information | |
|---|---|
| Hazard Symbols |  Irritant |
| Categories of danger | irritant |
| R Phrase | R 31-37-41 Contact with acids liberates toxic gas.Irritating to respiratory system.Risk of serious damage to eyes. |
| S Phrase | S 26-39 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection. |
| Storage and Shipping Information | |
|---|---|
| Storage | Store at +5°C to +30°C. |
| Transport Information | |
|---|---|
| Declaration (railroad and road) ADR, RID | Kein Gefahrgut |
| Declaration (transport by air) IATA-DGR | No Dangerous Good |
| Declaration (transport by sea) IMDG-Code | No Dangerous Good |
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