Title: sodium bisulfite = sodium metabisulphite ?
Post by: Elementary on May 27, 2002, 10:50:00 AM
sodium bisulfite = sodium metabisulphite ?
sodium metabisulphite is available as a sterilizing powder for homebrewing
Don't cry for me I'm the cleaner
Title: Not quite, but sorta.
Post by: Chromic on May 27, 2002, 11:58:00 AM
>sodium bisulfite = sodium metabisulphite
Not quite, but they're interchangable.
Title: Merck
Post by: Elementary on May 27, 2002, 01:51:00 PM
Monograph number: 8731 Title: Sodium Bisulfite. CAS Registry number: [7631-90-5] Additional name(s): Sodium acid sulfite. Molecular formula: HNaO3S Molecular weight: 104.06 Composition: H 0.97%, Na 22.09%, O 46.12%, S 30.81%. Line formula: NaHSO3. Literature references: The bisulfite of commerce consists chiefly of sodium metabisulfite, Na2S2O5, and for all practical purposes possesses the same properties as the true bisulfite. Toxicity: Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951). Properties: White, crystalline powder; SO2 odor; disagreeable taste; on exposure to air it loses some SO2 and is gradually oxidized to sulfate. d 1.48. Sol in 3.5 parts cold water, 2 parts boiling water, in about 70 parts alcohol. Its aq soln is acid. Keep well closed and in a cool place. Incompat: Acids, oxidizers. LD50 i.v. in rats: 115 mg/kg (Hoppe, Goble). Density: 1.48 Caution: Concd solns are irritating to skin, mucous membranes.
USE: As disinfectant and bleach, particularly for wool; in dyeing for preparing hot and cold indigo vats; in paper-making in place of sodium hyposulfite to remove Cl from bleached fibers; as stripper (reducer) in laundering; to remove permanganate stains from skin and clothing; to render certain dyes sol; manuf sodium hydrosulfite; coagulating rubber latex; as preservative for deteriorative liqs or solns used for technical purposes; as antiseptic in fermentation industries. As preservative and bleach in food. Pharmaceutic aid (antioxidant).
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Monograph number: 8784 Title: Sodium Metabisulfite. CAS Registry number: [7681-57-4] CA name(s): Sodium pyrosulfite. Molecular formula: Na2O5S2 Molecular weight: 190.11 Composition: Na 24.19%, O 42.08%, S 33.73%. Line formula: Na2S2O5. Literature references: Crystallizes from cold water with 7H2O. Properties: White crystals or powder; odor of SO2. Freely sol in water, glycerol; slightly sol in alcohol. The aq soln is acid.
USE: Pharmaceutic aid (antioxidant).
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Monograph number: 8771 Title: Sodium Hydrosulfite. CAS Registry number: [7775-14-6] Additional name(s): Sodium sulfoxylate; sodium dithionite. Molecular formula: Na2O4S2 Molecular weight: 174.11 Composition: Na 26.41%, O 36.76%, S 36.83%. Line formula: Na2S2O4. Literature references: The hydrosulfite of commerce contains 85-90% Na2S2O4. Properties: White or grayish-white, cryst powder; slight characteristic odor. Oxidizes in air (more readily so in presence of moisture or when in soln) to bisulfite and bisulfate and acquires an acid reaction. Very sol in water, slightly in alcohol. Note: The name sodium hydrosulfite is applied also to NaHSO2, mol wt 88.06, sol in water, alcohol. Still more confusion results when "sodium hyposulfite" is applied to this compd (Na2S2O4) see 1957 Subject Index to Chem. Abstracts, p 2218s under sodium dithionite.
USE: As reducing agent, particularly in dyeing with indigo and vat dyes; bleaching soaps, straw; removing dyes from dyed fabrics.
Don't cry for me I'm the cleaner
Title: pool supply
Post by: BenWiFFen on May 27, 2002, 05:26:00 PM
I'm pretty sure swimming pool and spa joints sell what your looking for. Or pool section at home type stores. Give me libreum or give me Meth
Title: Potassium metabisulphite?
Post by: runne on March 04, 2003, 08:26:00 AM
also found in homebrewing stores.. can this be used inplace of sodium metabisulphite?
Title: Re: can this be used inplace of sodium ...
Post by: SpicyBrown on March 04, 2003, 12:12:00 PM
can this be used inplace of sodium metabisulphite?
Yes. In fact its usually the other way around, sodium metabisulfite is used in place of sodium bisulfite.
-SpicyBrown
Title: bisulfite
Post by: chochu3 on March 10, 2003, 02:08:00 AM