Paraformaldehyde
Paraformaldehyde (PFA) is the smallest polyoxymethylene, the polymerization product of formal dehyde with a typical degree of polymerization of 8–100 units. Paraformaldehyde commonly has a slight odor of formal dehyde due to decomposition. Para formal dehyde is a poly-acetal.
| Parameter | Value |
|---|---|
| Molecular Formula | OH(CH2O)nH (n = 8 - 100) |
| Appearance | white crystalline solid |
| Density | 1.42 g·cm−3 (25 °C) |
| Melting point | 120 °C |
| Solubility in water | low |
| Industry | Application |
|---|---|
| Plastic | Used as thermoplastic |
| Agriculture | Used as a fungicide |
