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Paraformaldehyde
 | |
| Names | |
|---|---|
| IUPAC name
Polyoxymethylene
| |
| Identifiers | |
| ChemSpider |
|
| ECHA InfoCard | 100.108.270 |
| EC Number |
|
| UNII | |
| UN number | 2213 |
CompTox Dashboard (EPA)
|
|
| Properties | |
| OH(CH2O)nH (n = 8 - 100) | |
| Appearance | White powder with formaldehyde-like odour |
| Density | 1.46 g/cm3 |
| Melting point | 120 °C (248 °F; 393 K) |
| slightly soluble | |
| Vapor pressure | 1.579 kPa |
| Hazards | |
| GHS labelling:[1] | |
 
| |
| Danger | |
| H228, H302, H315, H317, H318, H332, H334, H351 | |
| NFPA 704 (fire diamond) | |
| Flash point | 71 °C (160 °F; 344 K) |
| 300 °C (572 °F; 573 K) | |
| Explosive limits | 7.0% (low), 73% (high) |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
|
800 mg/kg (rat, oral) |
LC50 (median concentration)
|
1070 mg/m3 (rat, 4h) |
| Safety data sheet (SDS) | Fisher Scientific |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Paraformaldehyde (PFA) is the smallest polyoxymethylene, the polymerization product of formaldehyde with a typical degree of polymerization of 8–100 units. Paraformaldehyde commonly has a slight odor of formaldehyde due to decomposition. Paraformaldehyde is a poly-acetal.
- ^ "C&L Inventory". echa.europa.eu. Retrieved 27 December 2021.
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