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Reactivity and uses

Further information: bisulfite
A tank containing 25% sodium bisulfite at a water treatment plant in Sunnyvale, California.

Sodium bisulfite is a common industrial reducing agent, as it readily reacts with dissolved oxygen:

2 NaHSO3 + O2 → 2 NaHSO4

It is usually added to large piping systems to prevent oxidative corrosion. In biochemical engineering applications, it is helpful to maintain anaerobic conditions within a reactor.

It is used for preserving food and beverages.

Organic chemists can purify ketones or aldehydes using Sodium bisulfite. An impure solution is mixed with saturated aqueous sodium bisulfite in an ice bath, which after reacting will produce a crystalline solid. This solid can then be converted back to the original compounds using dilute acid or base. [1] This happens due to the reversible nature of nucleophillic addition to carbonyl groups.

  1. ^ Clayden, Jonathan; Greeves, Nick; Warren, Stuart (2001). "Nucleophillic substitution at the carbonyl group". Organic Chemistry (2nd ed.). Great Clarendon Street, Oxford OX2 6DP: Oxford University Press. p. 138-139. ISBN 9780199270293.{{cite book}}: CS1 maint: location (link)

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