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Upper level
Ammonium molybdate
Boric Acid
Calcium Chloride
Caustic Soda Beads
Diammonium Phosphite
Manganese carbonate
Manganese Nitrate
Molybdenum disulfide
Molybdenum trioxide
Monopotassium phosphite
Phosphorous acid
Phosphorus Pentoxide
Polyphosphoric acid
Sodium bromide
Sodium molybdate

Phosphorous Acid


Identification

Synonyms:

Orthophosphorous acid; phosphonic acid

De: Phosphonsäure

ES: Ácido fosfónico

Fr:Acide phosphonique

CAS No.: 13598-36-2

EC No.: 233-663-1

Molecular Weight:  81.996

Molecular Formula: H3PO3

Structural Formula:

Density: 1.6510

M.P.: 73.6°C

B.P.: 200°C (decomposing at 180°C)

Application

Phosphorous acid is used in synthesis of phosphite salts, plastic stabilizers, pesticides, water-treatment chemicals, phosphite fertilizers for fruits like citrus and orange, vegetables, economic crops etc. , cosmetics additives.

Specification*

 

Parameters

Specification

  Grade I Grade II Grade III 70% Solution

Phosphorous acid Purity

99.0% min.

98.5% 98.5% min. 70% min.

Chloride (Cl-)

5ppm max.

20ppm max. 0.01% max. 5ppm max.

Iron (Fe)

5ppm max.

20ppm max. 30 ppm max. 5ppm max.

Sulfate (SO42-)

5ppm max.

20ppm max. 60 ppm max. 5ppm max.

Phosphate (PO43-)

0.1% max.

0.2% max. 0.3% max. 0.1% max.
Test of 70% water solution colorless colorless - -
Odor odorless odorless characteristic odorless

Appearance

white crystals

white crystals white crystals clear colorless liquid

 

Standard Packing

1)  25kgs/PP woven bag with double PE inner bags, 20~25mt/20' FCL

2)  500, 1000kgs/jumbo bag, 20mt/20' FCL

3)  Iron drum or Plastic drum

4)  For 70% solution, packing is 25kg/plastic pail, 250kg/plastic drum or 1300kg/IBC

Risks and Safety Info

Class 8; UN2834; PG III

R 22 Harmful if swallowed.

R 35 Causes severe burns.

S 26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

S 36/37/39 Wear suitable protective clothing, gloves and eye/face protection.

S 45 In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

Copyright 2005 Wanjie International Co., Limited (China)   All rights reserved   Last Updated 26 April, 2007