Phosphoric acid IP 2LT Go Back


: 7664-38-2

Molecular Formula

: H3PO4

Molecular Weight

: 98
Description: A clear, colourless, syrupy liquid; corrosive, when kept at a low temperature it may solidify, producing a mass of a colourless crystals which do not melt until the temperature reaches 28°C
Solubility: Miscible with water and with ethanol(95%)
Identification A: The solution is strongly acidic.
Identification B (Phosphate A): A light yellow precipitate should form, the colour of which should not change by boiling and which should readily soluble in 10 M ammonia and in dilute nitric acid
Identification B (Phosphate B): A white crystalline precipitate should form.
Identification B (Phosphate C): A bright yellow precipitate should form.
Appearance of Solution: Solution A should be clear and colourless.
Arsenic (As): NMT 2ppm
Heavy metals: NMT 10ppm
Iron (Fe): NMT 60ppm
Chloride (Cl): NMT 50ppm
Sulphate (SO4): NMT 100ppm
Alkali Phosphates: No turbidity should produced.
Aluminium and calcium: The solution remains clear.
Hypophosphorus acid and phosphorous acid: The appearance of the solution does not change.
Assay (By Titration): 84.0%-90.0% w/w
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