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Product characteristics
The Product was colorless crystal or white crystalline powder with the relative density of 2.34 . The melting point was 150-190 °C (decomposition).
The product had a flavor of sulfur dioxide and soluble in water with acidic aqueous solution, it was not soluble
in ethanol. Sulfur dioxide was released from acidic solution and oxidized to sulfate in the air.
Test item | Unit | Specification | Test method |
K2S2O5 | g/100g | ≥97.2 | ANSI PH 4277-1980 Acc.Fcc IV p.322 |
SO2 | g/100g | ≥56.0 | calculation |
Water solubility | - | standard | ISO 3629-1976(E) |
K2S2O3 | g/100g | <= 0.07 | ISO 3629-1976(E) |
PH-value(5% solution) | - | 3.8-4.8 | ISO 3629-1976(E) RCA/Q-S-066 |
Heavy metal(measured by Pb) | mg/kg | <= 10 | ICP-AES AAS |
Fe | mg/kg | <= 5 | ICP-AES |
React with NH3/AgNO3 | - | standard | ISO 3629-1976(E) |
K2SO3 +K2SO4 | mg/kg | excess | calculation |
Supplier's Info
Zibo Changcheng Chemical Factory is a professional supplier of potassium metabisulfite. With high quality products, excellent service and a good reputation, which has won great support from customers around the world. We support all kinds chemical products with all the licence and OEM/ODM services. We are looking forward to establish long-term business relationship around the world. We guarantee the finest quality, best price and delivery time!
Packaging
25kg per bag, composite bag lined with plastic bag, or by user’s request.
Transport
Potassium Metabisulfite (oxidation preventive)