This specification covers a zinc hydroxy phosphite pigment having the general formula ZnHPO₃· [ZnO·2Zn(OH)₂]. The pigment shall consist of zinc hydroxy phosphite and shall conform to the requirements specified. Tests shall be conducted in accordance with the following test methods: chemical analysis; moisture loss; oil absorption; and sieve residue.

1.1 This specification covers a zinc hydroxy phosphite pigment having the general formula ZnHPO₃·[ZnO·2Zn(OH)₂].