DERIVATION.--Made from alum, 100 parts; monohydrate sodium carbonate, 43
parts; water, a sufficient quantity. Mix hot, boiling solutions of alum
and sodium carbonate. Precipitate strained, washed and dried.
PROPERTIES.--A white, light, amorphous powder; odorless and tasteless;
permanent in dry air; insoluble in water or alcohol.
DOSE.--Same as alum.