Potassium disulfite, for analysis, ExpertQ®
- Synonyms: Potassium metabisulfite, Potassium pyrosulfite
- K2S2O5
- M = 222,33 g/mol
- CAS [16731-55-8]
- EINECS-No.: 240-795-3
- Solub. in water: (20 ºC): 450 g/l
- Melting point: 190 ºC
- LD 50 (oral, rat): 2300 mg/kg
- GHS-signal word: Danger
- GHS-H sentences: H318 - H335 - EUH031
- GHS-P sentences: P261 - P280 - P305+P351+P338 - P310 - P405 - P501a
- Tariff number: 2832 20 00 00
- Applications: analytical chemistry, laboratory reagent, inorganic salts, preservative agent (in food industry).
SPECIFICATIONS
assay (iodometric): min. 96 %
insoluble in water: max. 0,005 %
chlorides (Cl): max. 0,005 %
phosphates (as PO4): max. 0,0002 %
thiosulfates (S2O3): max. 0,05 %
arsenic (As): max. 1 ppm
copper (Cu): max. 0,001 %
iron (Fe): max. 5 ppm
lead (Pb): max. 0,001 %
nickel (Ni): max. 0,001 %
zinc (Zn): max. 0,001 %
| Reference | Volume | ||
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PO0241005P | x 5 kg |
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PO0241025P | x 25 kg |
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PO02410500 | x 500 g |
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PO02411000 | x 1 kg |
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