Physical state at 20 °C | Solid | Odour | Odorless to slight ammonia odor |
Solubility in water [% weight] | Soluble in water | Colour | Reddish brown |
Appearance | Reddish brown to dark brown crystalline powder |
Assay (as Fe) | 20.5 – 22.5% |
Chloride (Cl) | Max 0.25% |
Sulphate (SO4) | Max 0.3% |
Heavy metal (as Pb) | Max 0.003% |
Arsenic (As) | Max 0.0004% |
Zinc (Zn) | Max 0.005% |
Free ferric compounds | Passes test |