Ii. Items, index Appearance, clear, colorless to ale yellow aqueous solution Active content (hedp)%, 58.0-62.0 Phosphorous acid (as po33-)%, 2.0 max Phosphoric acid (aspo43- )%, 0.8 max Chloride (as cl-) ppm, 100.0 max Ph (1% solution), 2.0 max Density (20¡æ)g/cm3, 1.43-1.47 Fe, mg/l, 10.0 max Colour apha (hazen), 30.0 max Acetic acid %, 0.5 max Ca sequestration (mg caco3/g), 500.0 min