I. PROPERTIES
a. Appearance: White crystal/powder.
b. Solubility: Insoluble in water, insoluble in alcohol, Its water solution appears weak acid.
C. Molecular formula: Al(H2PO2)3
d. Structural formula: 
e. Molecular weight: 221.95
f. CAS NO.: 7784-22-7
II. Quality standard
| Item |
Specification |
| Al(H2PO2)3Content |
97-99% Min. |
| Particlesize(D50 μm) |
50 Max. |
| The initial thermal decomposition temperature |
≥280°C |
| Phosphide(%) |
41.9±0.5 % |
| Aluminum salt(%) |
12.2±0.5% |
| Moisture(%) |
≤0.5% |
| PH (20 °C, 100 g/l) |
3-5 |
Ⅲ. Usage
The product is suitable in Flame retardant modification of PBT, PET, TPU, ABS. Using an appropriate amount of stabilizer agent, coupling agent mixed with P-N flame retardant as APP, MC or MCA in usage. 8%-12% can be satisfactory for polyester or polyester type TPU, 25%-35% can be satisfactory for SEBS.
Ⅳ. Package
In 25kg kraft paper bag, inner lined with PVC bag, or as customer required.
Aluminium Hypophosphite
