Model NO. : Phosphorous Acid
Chloride (as Cl) : <0.01%
Phosphate : <0.20%
Transport Package : 25kg Woven Bag
Specification : H3O3P 99%
Trademark : Andu
Model NO. : Phosphorous Acid
Chloride (as Cl) : <0.01%
Phosphate : <0.20%
Transport Package : 25kg Woven Bag
Specification : H3O3P 99%
Trademark : Andu
Appearance and properties: White crystalline solid
Density: 1.651 g/mL at 25 °C(lit.)
Melting point: 73 °C
Boiling point: 200 °C
Flash point: 200°C
Water solubility: SOLUBLE
Acidity coefficient (pKa): pK1 1.29; pK2 6.74(at 25oC)
Storage conditions/storage methods: The warehouse is ventilated and dry at low temperature, and stored separately from H pore-forming agent and alkali.
Specification
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Inspection items
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The degree of the products
|
|
Best Grade
Products
|
Best Grade
Products
|
First grade
products
|
|
Main contents(counted with H3PO3)
|
99
|
98.5
|
98
|
|
Iron(counted with Fe)
|
0.001
|
0.0015
|
0.0020
|
|
Chloride(counted with C1)
|
0.008
|
0.01
|
0.01
|
|
Sulfate(counted with SO4)
|
0.001
|
0.002
|
0.002
|
|
Phosphate(counted with SO4)
|
0.1
|
0.2
|
0.2
|
|
Complexion
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White crystal
|
White crystal
|
White crystal
|
|
Water solution experiments
|
White crystal
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Clear and achromatic
|
Clear and achromatic
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Uses: Used as reducing agent, nylon whitening agent, also used as phosphite raw materials, pesticide intermediates.
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