Products Description
Paraformaldehyde is a white solid with a faint pungent odor. It is a linear polymer of formaldehyde with the structural formula HO(CH2-O)xH, where the average value of x is about 30. Polymers with a value of x less than 12 are soluble in water, while those with higher molecular weights are not immediately soluble. It dissolves slowly in water via hydrolysis to form shorter polymer chains. It is flammable but may be difficult to ignite, with a flash point of 158 °F. It is widely used in the production of fungicides, bactericides and adhesives. This compound is harmful to the ecological environment, so immediate measures should be taken to prevent its release into the environment.
Chemical Properties
| Item | Value |
| Melting point | 120-170 °C (lit.) |
| Boiling point | 107.25°C (rough estimate) |
| density | 0.88 g/mL at 25 °C (lit.) |
| vapor density | 1.03 (vs air) |
| vapor pressure | <1.45 mm Hg ( 25 °C) |
| refractive index | 1.4540 (estimate) |
| Fp | 158 °F |
| storage temp. | 2-8°C |
| solubility | chlorophenol above 70°C: soluble |
| form | prilled |
| color | White to off-white |
| Odor | odor of formaldehyde |
| PH | 5.5 (H2O, 20℃)(saturated solution) |
| PH Range | 4 - 5.5 |
| explosive limit | 7-73%(V) |
| Water Solubility | sparingly soluble |
| Merck | 14,7025 |
| BRN | 102769 |
| Dielectric constant | 4.0（Ambient） |
| Stability | Stable. Incompatible with strong acids, organic acids, strong oxidizing agents, oxides, alkalies, strong bases, amines. Combustible. Dust may form an explosive mixture with air. Liberates poisonous gases on combustion. |
| InChIKey | VHWYCFISAQVCCP-UHFFFAOYSA-N |
| EPA Substance Registry System | Paraformaldehyde (30525-89-4) |
Safety Information
| Item | Value |
| Hazard Codes | Xn,F |
| Risk Statements | 31-43-40-36/37/38-20/22-41-37/38-42/43-20/21/22-11 |
| Safety Statements | 36-45-36/37/39-26-24-22 |
| RIDADR | UN 2213 4.1/PG 3 |
| WGK Germany | 3 |
| RTECS | RV0540000 |
| Autoignition Temperature | 572 °F |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | III |
| HS Code | 38084090 |
| Hazardous Substances Data | 30525-89-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 592 mg/kg |
Product Application
Paraformaldehyde is used as a fumigant and disinfectant, and serves as an important raw material for manufacturing synthetic resins such as melamine resin, phenolic resin and polyacetal resin. It is also applied in cell culture experiments and used as a fixative in electron microscopy. Moreover, it is employed to prepare formalin fixatives for biological tissues and cells. For fixation purposes, paraformaldehyde must be heated to convert into monomeric formaldehyde, which acts as the effective component for tissue fixation.
Supply & Delivery
Fast delivery time
Inventory: 2-3 working days
New production: 7-10 working days
