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7681-57-4 - Sodium metabisulfite, 97% - Sodium pyrosulfite - Sodium sulfite - A17351 - Alfa Aesar

A17351 Sodium metabisulfite, 97%

Codice CAS
7681-57-4
Sinonimi
Sodium pyrosulfite
Sodium sulfite

Dimensioni Prezzo ($) Quantità Disponibilità
500g 22,60
2500g 43,90
10000g 136,00
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Sodium metabisulfite, 97%

MDL
MFCD00167602
EINECS
231-673-0

Proprietà chimiche

Formula
Na2O5S2
Peso formula
190.10
Punto di fusione
>300°
Densità
1.480
Sensibilità
Air & Moisture Sensitive
Solubilità
Soluble in water, ethanol and glycerol.

Applicazioni

Sodium metabisulfite is used as an active ingredient in campden tablets, as a cleaning agent for potable water reverse osmosis membranes, as a preservative and an antioxidant in food. It also acts as a corrosion inhibitor in oil and gas industry, as a bleaching agent in the production of coconut cream, as the source of sulfur dioxide and in the destruction of cyanide in commercial gold cyanidation processes. It is utilized in the precipitation of gold from auric acid as well as in the waste water treatment to remove hexavaent chromium as trivalent chromium by precipitation after reduction. Further, it is used in photography. In addition, it plays as an oxygen scavenger to eliminate the dissolved oxygen in wastewater and in pipes.

Note

Moisture and air sensitive. Incompatible with strong oxidizing agents and strong acids.

Letteratura

Tan, T. C.; Cheng, L. H.; Bhat, R.; Rusul, G.; Easa, A. M. Effectiveness of ascorbic acid and sodium metabisulfite as anti-browning agent and antioxidant on green coconut water (Cocos nucifera) subjected to elevated thermal processing. Int. Food Res. J. 2015, 22 (2), 631-637

Zaid, B.; Maddache, N.; Saidi, D.; Souami, N.; Bacha, N.; Ahmed, A. S. Electrochemical evaluation of sodium metabisulfite as environmentally friendly inhibitor for corrosion of aluminum alloy 6061 in a chloride solution. J. Alloys Compd. 2015, 629, 188-196.

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H302-H318

Harmful if swallowed. Causes serious eye damage.

Dichiarazioni precauzionali: P280i-P264-P305+P351+P338-P310a-P301+P312a-P501a

Wear eye/face protection. Wash thoroughly after handling. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Merck
14,8638
Codice tariffe armonizzato
2832.10
TSCA
Yes
RTECS
UX8225000

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