O-O-670C, FEDERAL SPECIFICATION: ORTHOPHOSPHORIC (PHOSPHORIC) ACID, TECHNICAL (13-NOV-1991) [S/S BY A-A-55820]

O-O-670C, FEDERAL SPECIFICATION: ORTHOPHOSPHORIC (PHOSPHORIC) ACID, TECHNICAL (13-NOV-1991) [S/S BY A-A-55820]., This specification covers two classes of technical grade orthophosphoric acid, commonly called phosphoric acid.