Inorganic Chemicals

Phosphorous acid

Phosphorous acid
Molecular formula: H3PO3
Molecular weight: 82

Physiochemical properties:
Specific gravity: 1.651(21.2°C)

Melting point: 73.6°C

Boiling point: 200°C(decomposed)
Properties: colorless crystal, easily soluble in water, soluble in alcohol.


Item Premium grade Grade I Grade II Grade III Solution
Assay %, ≥ 99% 99% 99% 98.5% 70%
Chloride (Cl-) %,≤ 0.001 0.001 0.002 0.02 0.001
Iron (Fe) %, ≤ 0.0005 0.001 0.002 0.005 0.0005
Sulphate (SO4) %, ≤ 0.001 0.008 0.008 0.008 0.001
Phosphate (PO4) %, ≤ 0.1 0.2 0.2 0.2 0.1
Smell odorless odorless odorless odorless odorless
Appearance Pure white crystal white crystal white crystal white crystal Clear colorless


Used as reducing agent, nylon whitener, plastic thermometer, synthetic fiber in plastic industry; as materials for producing weedicide, bactericide and water stabilizer in pesticide industry.

In 1000Kg、500Kg flexible container or 25kg paper-plastic compound bag.

It should be covered in transportation. Avoid drench, moisture.

Stored in cool and dry place.


About Jorry

Sales Director of Henan Harvest Chem Co.,Ltd


2 thoughts on “Phosphorous acid

  1. what is the sodium content that can be present in food grade phosphoric acid

    Posted by sheela nair | August 27, 2010, 5:14 pm

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Contact me:

adminMr. Jorry Zhang
Current position: Sales manager of Henan Harvest Chem Co.,Ltd
Cell: +86-15803826779
Tel: +86-371-86058571
Fax: +86-371-65350610
Welcome to send emails to me  for more information!

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