钠Metabisulphite

Sodium Metabisulfite 7681-57-4 Chemical Name: Sodium Metabisulfite / Sodium Metabisulphite / Sodium Disulfite / Sodium disulphite / Sodium pyrosulfite / sodium pyrosulphite Chemical Formular: Na2S2O5 Molecular Wegight: 190.13 CAS No.: 7681-57-4 Specification: Purity (Na2S2O5) Iron (Fe) Heavy metal (Pb) Water Insoluble Arsenic (As) PH value 96.5% min 0.003% max 0.0005% max 0.05% max 0.0001% max 4.0-4.6 Typical Physical Properties - Sodium Metabisulfite is a white to slightly yellowish, crystalline powder with a odour of sulfur dioxide. Content of SO2 at least 65% Application In the chemical and pharmaceutical industries for various purposes , e. g. as a reducing agent, for purifying and isolating aldehydes and ketones. For destroying waste bromine. In drinking water treatment to remove excess chlorine. In the treatment of wastewater, e. g. from electroplating plants, to neutralize chromic acid; to remove excess chlorine in the neutralization of cyanide. In special cases to remove oxygen from boiler feed water. For cleaning and bleaching wool, jute, and other vegetable fibres. In the paper and pulp industry for bleaching ground wood. Sodium Metabisulfite photo grade in the photographic and film industry for preparing developer solutions, for acidifying fixing baths. Sodium Metabisulfite food grade : For preserving foodstuffs . As anti-melanosis additive for sea food. Packing in pp bag of 25kg net each, with separate inner PE liner (Qty: 25mt/20'FCL) in pp bag of 1250kg net each, with separate inner PE liner (Qty: 25mt/20'FCL) in pp bag of 1000;1100;1200kg net each, with separate inner PE liner (Qty: 25mt/20'FCL)