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Phosphorous Acid |
Name |
Phosphorous Acid |
Molecular formula |
H3PO3 |
Structure |
 |
Molecular weight |
81.99 |
CAS No. |
13598-36-2 |
Density |
1.65 |
Melting Point |
73℃ |
Boiling Point |
200℃ |
Traits |
Colorless crystals, density 1.65g/m3,
there is a strong hygroscopicity, soluble in
water, there is rot Erodibility. |
Use |
Phosphite widely used for manufacturing of
raw materials, the plastics industry for the
manufacture of plastic stability
Agent of
raw materials, chemical reactions used as a
reducing agent, also used for synthetic fiber,
pesticide Industries. |
Export |
Coating woven bags, kraft paper bag lined
with double-layer composite plastic bag, net
weight 25
kilograms or 1000 kilograms. |
  
Quality
indicators (People's Republic of China chemical
industry HG/T2520-93 standard)
Test Item |
Top Grade-1 |
Top Grade-2 |
First Grade
I |
First Grade
III |
Main content (H3PO3 in
dollars) (%) |
99.0 Min |
99.0 Min |
98.5 Min |
98.5 Min |
Iron (FE) (PPM) |
5 Max |
10 Max |
20 Max |
50 Max |
Chloride (Cl) (%) |
0.0008 Max |
0.001 Max |
0.002 Max |
0.02 Max |
Sulphate (SO4 in
dollars) |
0.0008 Max |
0.006 Max |
0.008 Max |
0.01 Max |
Phosphate (PO4 in
dollars) |
0.05 Max |
0.1 Max |
0.2 Max |
0.6 Max |
Appearance |
Pure White Crysta |
Pure White Crystal |
Pure White Crysta |
Pure White Crysta |
70% Aqueous Solution Test |
Colorless transparent |
Colorless transparen
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--
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--
|
Liquid POA (%) |
70-80 Min. |
70-80 Min. |
-- |
-- |
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