White precipitate

(Old Chem.) A heavy white amorphous powder (NH2.HgCl) obtained by adding ammonia to a solution of mercuric chloride or corrosive sublimate; - formerly called also infusible white precipitate, and now amido-mercuric chloride.
A white crystalline substance obtained by adding a solution of corrosive sublimate to a solution of sal ammoniac (ammonium chloride); - formerly called also fusible white precipitate.

See also: Precipitate, Precipitate