Phosphorus Acid Crystals

Grade

Technical

Form

Solid

Other Trade Name

Phosphonic acid/ Orthophosphorous acid

Chemical Formula

H3PO3

Molecular Weight

82.0g/mo

Spec. No.

PR/PAC/17/11-03

CAS No.

13598-36-2

UN No.

2834

Class

8

Packing Group

III

Appearance

White or yellowish crystalline solid, hygroscopic

Purity (%)

99 min

Chloride (%)

0.01 max

Sulphate (%)

0.01 max

Phosphate (%)

0.2 max

Iron (%)

0.002 max

Lead (%)

0.001 max

Packing

50 Kg net in HDPE drums

Safety and Handling

Refer Safety Data Sheet

Applications

Phosphorous acid is used to produce phosphonates like ATMP, HEDP, PBTC which are used as scale inhibitor or corrosion inhibitors in water treatment. It is also used in preparing PMIDA which is a very important intermediate of herbicide glyphosate. It is used to prepare phosphite salts which are used in controlling microbial plant diseases