42% or 50% may be obtained by the addition of sodium carbonate, these are often used in combination with sodium formate. Since 33% of the anion charges are due to hydroxy ions the basicity is 33% (but in tanning jargon it is known as 33% reduced). Basic Chromium Sulphate is used in dyeing of khaki cloth and in manufacture of chrome-based dyestuffs.īasic chromium sulfate is produced from chromate salts by reduction with sulfur dioxide, although other methods exist.
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