Hydrosulfites

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Related to hydrosulfite: sodium hydrosulfite

Hydrosulfites

 

(also called bisulfites), acid salts of sulfurous acid, H2S03—for example, KHS03. Hydrosulfites are produced by the reaction K2C03 + 2S02 + H20 = 2KHSO 3+ C02. As opposed to the majority of neutral salts of H2S03, or sulfites, all hydrosulfites are readily soluble in water. In solutions hydrosulfites are gradually oxidized by atmospheric oxygen to salts of sulfuric acid. When sodium or potassium hydrosulfite is heated, pyrosulfites, which are often called metabisulfites, are formed: 2KHS03 = K2S2O5 + H2O. Sodium hydrosulfite, NaHSO3, is used in photography and for bleaching various materials; calcium hydrosulfite, Ca(HS03)2, is used to obtain cellulose from wood.

References in periodicals archive ?
Archroma's eco-advanced manufacture of Denisol Indigo 30 does not use sodium hydrosulfite.
modules allows better penetration and fixing to the yarn and therefore an increased colour yield as well as savings up to 80% in caustic soda and sodium hydrosulfite, combined with a considerable decrease in the consumption of washing water.
The kits are packaged with two squeeze bottles of phosphate buffer with Saponin two buffer dispensing caps, and two vials of Sodium Hydrosulfite reagent powder.
Blue indigo is reduced to the yellow leuco form by heating it with sodium dithionite (sodium hydrosulfite, [Na.
OXIDATIVE REDUCTIVE * Chlorine (C) * Hydrosulfite (Y), usually * Chlorine dioxide (D) sodium based * Oxygen (O) * FAS (formamidine * Ozone (Z) sulfinic acid) * Hypochlorite (H) * Hydrogen peroxide (P)
Morrison's color kitchen for caustic hydrosulfite and indigo is supplied with filters pumps or flow meters to allow unintenupted operation.
Clariant UK, Widnes, England, said its Widnes plant is back in regular production of sodium hydrosulfite, a chemical widely used in the paper, clay and textile industries.
Blue indigo dye is reduced to its pale yellow leuco form by sodium dithionite (sodium hydrosulfite, [Na.
from low 5%-10 % warm caustic (>130F) pH solutions 5%-10% hydrochloric acid 2%-3% hydrofluoric acid (CAUTION: see article text) Sulfates and carbonates 5%-10% hydrochloric acid Vanasol industrial toilet bowl cleaner (mix of strong hydrochloric acid and phosphoric acid) Combination of sodium metabisulfite & sodium hydrosulfite Silica or tenacious 2%-3% hydrofluoric acid scales (CAUTION: see article text) Table 1: Recommended cleaning solutions.
Reducing agents include water soluble thiosulfates and hydrosulfites and their salts, such as the sulfates of metals such as iron, nickel and copper.