Appearance

Clear, Colorless to pale yellow aqueous solution

Active Content (as PBTC)

49.0 - 51.0%

Phosphorous acid (as PO33-)

0.5% max

Phosphoric acid (as PO43- )

0.2% max

pH (1% water solution)

1.5 - 1.9

Density (20 o C) g/cm3

1.27 - 1.31

Iron

10 ppm max

Chlorides

10 ppm max