Appearance  

Clear colourless to pale tan liquid, free from foreign matter.

Odour

Slight to none

Active Acid (%)

59.5 - 61.0

pH (1% solution at 20°C) w/v

2.0 max

pH (1% solution at 20°C) v/v

2.5 max

Sequestrant value (mgCaCO₃/g )

400 min

Iron, as Fe (ppm)

30.0 max

Phosphorous acid as H₃PO₃         phosphoric acid as H₃PO₄ (%)

4.0 max

Orthophosphate as PO₄^3- (%)

0.5 max

Viscosity at 25°C (mm²/s)

35.0 - 41.0

Specific Gravity at 20/20°C

1.440 - 1.455

Chloride (as Cl^-, %)

1.0 max

Colour (APHA)

30 max

Arsenic content (As ppm)

1.0 max