Difference between revisions of "Potassium Metabisulfite"

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==Application==
 
==Application==
 
It is used as an antiseptic, reagent, source of sulphurous acid, brewing (cleaning casks and vats), [[wine]]-making (said to kill only undesirable yeasts and bacteria), food preservative, developing agent (photography), process engraving and lithography, dyeing, antioxidant, bleaching agent.<br><br>
 
It is used as an antiseptic, reagent, source of sulphurous acid, brewing (cleaning casks and vats), [[wine]]-making (said to kill only undesirable yeasts and bacteria), food preservative, developing agent (photography), process engraving and lithography, dyeing, antioxidant, bleaching agent.<br><br>
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==Shipment / Storage / Risk factors==
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Shipped in bottle or drums. Used as an antiseptic, as a food preservative, a bleaching agent in photography and in the brewing and wine-making industries.<br><br>
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On exposure, becomes damp, tinged with yellow, and undergoes a chemical change. For example, instead of containing the customary 54% to 57%, [[sulphur]] trioxide the damaged portion on analysis may be found to contain only 20% to 22%.<br><br>
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| Appearance
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| White crystalline powder
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| Odour
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| Pungent (sulfur dioxide)
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| Density
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| 2.34 g/cm <sup> [[File:Example.jpg]]
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Appearance         white crystalline powder
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Odour                         pungent (sulfur dioxide)
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Density                         2.34 g/cm3 (solid)
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Melting point                190 °C decomp.
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Solubility in water        450 g/l (20 °C)
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Solubility         insoluble in ethanol
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See also: http://www.chemicalland21.com/listaz01.htm#T
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Note:
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For overseas carriage aspects of [[Chemicals]], the readers are recommended to acquire or have access to a good chemical dictionary, and a copy of the International Maritime Dangerous Goods (IMDG) Code, issued by the International Maritime Organisation. Also consult the applicable MSDS sheet.

Revision as of 15:38, 24 February 2014

Infobox on Potassium Metabisulfite
Example of Potassium Metabisulfite
Potassium metabisulfite-1.jpg
Facts
Origin
Stowage factor (in m3/t)
Humidity / moisture
Ventilation
Risk factors

Potassium Metabisulfite

Description

Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent sulfur odour. The main use for the chemical is as an antioxidant or chemical sterilant. It is a disulfite and is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably. Potassium metabisulfite is generally preferred out of the two as it does not contribute sodium to the diet. The product is soluble in water.

Application

It is used as an antiseptic, reagent, source of sulphurous acid, brewing (cleaning casks and vats), wine-making (said to kill only undesirable yeasts and bacteria), food preservative, developing agent (photography), process engraving and lithography, dyeing, antioxidant, bleaching agent.

Shipment / Storage / Risk factors

Shipped in bottle or drums. Used as an antiseptic, as a food preservative, a bleaching agent in photography and in the brewing and wine-making industries.

On exposure, becomes damp, tinged with yellow, and undergoes a chemical change. For example, instead of containing the customary 54% to 57%, sulphur trioxide the damaged portion on analysis may be found to contain only 20% to 22%.

Appearance White crystalline powder
Odour Pungent (sulfur dioxide)
Density 2.34 g/cm File:Example.jpg



Appearance white crystalline powder Odour pungent (sulfur dioxide) Density 2.34 g/cm3 (solid) Melting point 190 °C decomp. Solubility in water 450 g/l (20 °C) Solubility insoluble in ethanol

See also: http://www.chemicalland21.com/listaz01.htm#T

Note: For overseas carriage aspects of Chemicals, the readers are recommended to acquire or have access to a good chemical dictionary, and a copy of the International Maritime Dangerous Goods (IMDG) Code, issued by the International Maritime Organisation. Also consult the applicable MSDS sheet.