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連絡先担当者 Ms. candy
Sanhao, Shenyang, Liaoning
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SODIUM
METABISULFITE
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PRODUCT
IDENTIFICATION
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CAS NO.
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********4
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EINECS NO.
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********0
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FORMULA
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Na2S2O5
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MOL WT.
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**0.*0
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H.S. CODE
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TOXICITY
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SYNONYMS
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Dinatriumdisulfit; Disulfito de
disodio; Disulfite de disodium;
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Disodium disulfite; Disodium Salt
Pyrosulfurous Acid; Disulfurous acid, disodium salt; Pyrosulfurous
acid, disodium salt; Sodium Metabisulfite; Sodium disulfite; Sodium
Pyrosulfite;
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DERIVATION
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CLASSIFICATION
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PHYSICAL AND CHEMICAL
PROPERTIES
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PHYSICAL STATE
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white crystalline powder with odor
of sulfur dioxide
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MELTING POINT
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**0 C (Decomposes)
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BOILING POINT
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SPECIFIC GRAVITY
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1.*8
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SOLUBILITY IN WATER
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Freely soluble
(**0g/l)
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pH
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3.5 - 5
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VAPOR DENSITY
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AUTOIGNITION
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NFPA RATINGS
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Health: 1; Flammability: 0;
Reactivity: 0
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REFRACTIVE INDEX
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FLASH POINT
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STABILITY
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Stable under ordinary conditions.
Hygroscopic.
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GENERAL DESCRIPTION &
APPLICATIONS
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Sodium Metabisulfite is a white to
slightly yellowish crystalline powder with sulfur dioxide odor;
readily soluble in water. Sodium metabisulfite containing more than
*5.0% SO2 w/w releases sulfur dioxide gas when mixed with water. It
forms a bisulfite adduct with aldehyde and with ketones to a
sulfonic acid. It is used to purify or isolate aldehydes and
ketones. Sodium metabisulfite's reductive and sulfonating
properties provide versatile applications. It is used as an oxygen
scavenger to eliminate the dissolved oxygen in waste water and in
pipes. Bisulfite is a reductive bleaching agent. It reduces
carbonyl and alcohol groups, which function as colorants of the
substances. It is used in bleaching mechanical paper pulp, cotton,
wool and kaolin clay. Additional applications include as a
preservative (antioxidant), a hair waving agent, and Ensiling
agent. Bisulfites are used in industries concerned with
leather processing, food and beverage processing, gas
purification, water treatment to remove excess chlorine,
textiles and pulp processing, and many others. It is used as a
reducing agent in chemical manufacturing. It is an alternative to
sulfur dioxide which is used in sterlization of
equipment.
Examples of other metallic
bisulfite
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SALES SPECIFICATION
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