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7681-57-4 - Names and Identifiers
Name Sodium metabisulfite
Synonyms fertisilo
Sodium Metabi
SODIUM DISULFITE
Sodium disulphite
Sodium pyrosulfite
Sodiummetabisufite
Sodium pyrosulphite
disodium disulphite
Metabisulfite Sodium
disodiumpyrosulphite
Sodium metabisulfite
disodiummetabisulfite
metabisulfitedesodium
Sodium metabisulphite
SodiumMetabisulphiteAcs
SodiumMetabisulphiteExtraPure
disodium oxidosulfanesulfonate oxide
CAS 7681-57-4
EINECS 231-673-0
InChI InChI=1/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChIKey HRZFUMHJMZEROT-UHFFFAOYSA-L
7681-57-4 - Physico-chemical Properties
Molecular Formula 2Na.O5S2
Molar Mass 190.11
Density 1.48
Melting Point >300 °C (lit.)
Boling Point 150℃
Water Solubility 540 g/L (20 ºC)
Solubility 540 g/L (20°C)
Appearance White to yellowish crystals
Specific Gravity 1.48
Color White to slightly yellow
Odor Sulphorous
Exposure Limit ACGIH: TWA 5 mg/m3NIOSH: TWA 5 mg/m3
Merck 14,8638
PH 3.5-5 (50g/l, H2O, 20℃)
Storage Condition Store at +5°C to +30°C.
Stability Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.
Sensitive Air & Moisture Sensitive
MDL MFCD00167602
Physical and Chemical Properties White or yellowish crystalline powder.
The relative density is 1.4
The solubility is soluble in water, and the aqueous solution is acidic. Soluble in glycerol, ethanol-soluble.
Use Used as bleaching agent, mordant, reducing agent, rubber coagulant, also used in organic synthesis, pharmaceutical and perfume