Phosphorous acid

Phosphorous acid

1. Properties
(1) Classified information
Chinese name: phosphite
English name: Phosphorous acid
Molecular formula: H3PO3
Molecular weight: 82
CAS No. :13598 -36-2
UN No.: 2834
IMDG Code: 81502
Hazard Class: 8

(2) Physical and chemical properties
Appearance: white crystal
Melting point: 73.6 ° C
Boiling point: 200 ° C (decomposition)
Solubility: soluble in water, alcohol, strong hygroscopicity.
Density: 1.651g/cm ³
Hazardous characteristics: corrosive, thermal decomposition of the highly toxic gas.

(3) Quality indicators
HG/T2520-2006

2. Specification

Test Item	Super Class	First Class	Qualified
Appearance	White crystals
Main content of (H3PO3 total) ≥%	99	98.5	98
Iron content (Fe) ≤% ≤%	0.0005	0.003	0.005
Chlorine content (Cl) ≤%	0.005	0.01	0.02
Sulfuric acid (SO4) ≤%	0.001	0.008	0.01
Phosphoric acid content of (PO4 dollars) ≤%	0.1	0.2	0.2
Heavy metals (as Pb) ≤%	0.0002	0.001	0.002
Dissolved in water test (70% aqueous solution)	Colorless and transparent without visible impurities

3. Applications
For plastic stabilizers and production of synthetic fiber and phosphite raw materials and pesticides glyphosate, ethylene intermediates, can also be used to produce highly efficient water treatment agent, ATMP and Asia potassium dihydrogen phosphate

4. Packaging& Safety
25kg plastic woven bag (or according to customer design packing).
Avoid and H blowing agent such as a total storage mixed operation is strictly prohibited contact with skin or eyes.

Chemical raw materials