In order to obtain a pure white hydrazine sulfate as the first precipitate, it is necessary to cool the hydrazine solution thoroughly and filter it twice before the sulfuric acid is added.
"Organic-Syntheses"
Conant, James Bryant
The mother liquor obtained from the crystallized hydrazine sulfate contains a small amount of hydrazine.
"Organic-Syntheses"
Conant, James Bryant
The following mixture may be given: bicarbonate of soda, sulfate of soda and common salt, eight ounces of each, and powdered gentian and sulfate of iron, four ounces of each.
"Common Diseases of Farm Animals"
R. A. Craig, D. V. M.