Active Standard ASTM D4450 | Developed by Subcommittee: D01.31
Book of Standards Volume: 06.03
Historical (view previous versions of standard)
Significance and Use
1.1 This test method is intended for the determination of zinc oxide and phosphorous acid content of the pigment commercially known as zinc hydroxy phosphite. The zinc content is determined by ethylenediaminetetraacetate (EDTA) titration and calculated as zinc oxide (ZnO), while the phosphorus content is determined colorimetrically and calculated as phosphorous acid (H3PO3).
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
ICS Number Code 87.060.10 (Pigments and extenders)