CAS Number:30525‑89‑4
Synonyms:Paraformaldehyde; Polyoxymethylene; Polyformaldehyde; Formaldehyde polymer
Chemical Formula:(CH₂O)ₙ, typically n = 8–100
Molecular Weight:~30.03 g/mol × n (monomer unit 30.03 g/mol)
Product Introduction
A white to off-white crystalline solid or powder with a faint formaldehyde odor. Paraformaldehyde is the polymeric form of formaldehyde, stable at ambient conditions and used as a convenient source of formaldehyde gas or solution upon heating. Widely utilized in biology for fixation, resin manufacture, fumigation, and as a resin intermediate.
| Property | Value |
|---|---|
| Appearance | White/off-white crystalline powder or beads |
| Odor | Slight formaldehyde scent |
| Density @ 25 °C | ~0.88 g/mL |
| Melting Point | 120–170 °C (decomposes) |
| Boiling Point | ~107 °C (estimate) |
| Flash Point | ~158 °F (~70 °C) |
| Vapor Pressure @ 25 °C | <1.45 mm Hg |
| Refractive Index (n₂₀ᴅ) | ~1.454 |
| Solubility | Sparingly soluble in cold water; decomposes with heating/dissolving |
| Explosive Limits | 7–73% in air (dust flammable) |
| Autoignition Temperature | ~300 °C |
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