Hydrazinium sulphosalicylate, its preparation and its use as an antioxidizing stabilizer for tin(II) compounds
OwnerErich Rufinventor
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Abstract
The invention provides a compound of the formula [NH.sub.2 NH.sub.2 ].sub.a [C.sub.6 H.sub.3 (COOH) (SO.sub.3 H) (OH)].sub.b wherein a is 1 and b is from 1 to 2. The compound is useful for stabilizing tin (II) compounds against oxidation, in particular in the electrolytic coloring of aluminum or aluminum alloys.
Claims3
A process for stabilising a tin (II) compound which comprises adding to the compound, or to a solution or composition containing it, a hydrazinium sulphosalicylate of the formula
- [NH.sub.2 NH.sub.2 ].sub.a [2C.sub.6 H.sub.3 (COOH) (SO.sub.3 H) (OH)].sub.b
- wherein a is 1 and b is from 1 to 2.
A solution suitable for the electrolytic colouring of aluminum or an alloy thereof, the solution comprising a tin (II) compound and, as stabilizer therefor, a hydrazinium sulphosalicylate of the formula
- [NH.sub.2 NH.sub.2 ].sub.a [C.sub.6 H.sub.3 (COOH) (SO.sub.3 H) (OH)].sub.b
- wherein a is 1 and b is from 1 to 2.
Dependencies are inferred from the claim text.