Graphic details
Quality Standard of Phosphorous acid (Standards of the People’s Republic of China Chemical Industry HG/72520-93)
|
Item |
Superior |
Class 1 |
Qualified |
|
|
Ni % |
45-50 |
45-50 |
45-50 |
|
|
Al % |
47-49 |
47-49 |
47-49 |
|
|
Mo% |
* |
* |
* |
|
|
Distribution of particle |
Average: 50um |
20-40mesh |
40-60mesh |
|
|
Appearance |
||||
|
Packing |
||||
|
Storage & Delivery |
||||
|
Item |
Product level |
||
|
Superior |
Class 1 |
Qualified |
|
|
Assay (Calculated by H3PO3, %) |
99 |
98.5 |
98 |
|
Fe, % |
0.001 |
0.0015 |
0.0020 |
|
Chloride, % |
0.008 |
0.01 |
0.01 |
|
Sulfate (Calculated by SO4, %) |
0.001 |
0.002 |
0.002 |
|
Phosphate (Calculated by PO4, %) |
0.1 |
0.02 |
0.2 |
|
Appearance |
White crystals |
White crystals |
White crystals |
|
Water solution |
Clear and colorless |
Clear and colorless |
Clear and colorless |
Product Name: Phosphorous acid
Molecular formula: H3PO3
Molecular weight: 82
Uses: Used as a reducing agent, nylon whitening agent, also used as raw materials of phosphite, pesticide intermediates.
CAS No. 13598-36-2
Physical and chemical properties: Colorless crystals.
Relative density: 1.651 (21.2 ℃)
Melting point: 73.6 ℃
Boiling point: 200 ℃ (decomposition).
Soluble in water and alcohol.
When it is slowly oxidized in air, it turns out to be phosphoric acid. When it is heated to 180℃, It decomposes to be phosphoric acid and phosphine (extremely toxic). Phosphite is a binary acid, its acidity is slightly stronger than that of phosphate. It has strong reducibility, It can easily reduce Ag ions to silver and reduce sulfuric acid to sulfur dioxide. It has a strong hygroscopicity and deliquescence and it is corrosive.
Packing: 25kgs woven bag, or according to customer’s requirements.
Related Products
More than 20 years of experience in chemical production
ONLINE MESSAGES
CONTACT US
Add: No.2, No.1 Road, Taiwan Industrial Park, Gaoqing County, Zibo City, Shandong Province, China