A sand coated with silver and manganese. Used in the sterilization of large amounts of water: Uglow, Gan, Z. Hyg. Infektionskrankh. 117, 488 (1935); Granata, Ann. Ig. 56, 284 (1946); Chim. Ind. (Paris) 58, 148 (1947).
This monograph has been retired and is no longer subject to revision or update.