Paraformaldehyde
SIAL/158127 - powder, 95%
Synonym: Polyoxymethylene
CAS Number: 30525-89-4
Empirical Formula (Hill Notation): CH2O ]n
Molecular Weight: 30.03 (as monomer)
MDL Number: MFCD00133991
Linear Formula: HO(CH2O)nH
Product Type: Chemical
| assay | 95% |
| autoignition temp. | 572 °F |
| density | 0.88 g/mL at 25 °C (lit.) |
| expl. lim. | 73 % |
| form | powder |
| InChI | 1S/CH2O/c1-2/h1H2 |
| InChI key | WSFSSNUMVMOOMR-UHFFFAOYSA |
| mp | 120-170 °C (lit.) |
| Quality Level | 200 ![]() |
| SMILES string | [O-]#[C+H2] |
| storage temp. | 2-8°C |
| vapor density | 1.03 (vs air) |
| vapor pressure | <1.45 mmHg ( 25 °C) |
| Application: | Paraformaldehyde can be used as a:• Methylene building block in the Mannich reaction with primary amines and alkynes to synthesize propargyl amines. • Hydroxymethylation reagent to synthesize homoallylic alcohols by reacting with 1,1-disubstituted allenes. • Formylation reagent in the Ir-catalyzed N-formylation of amines to synthesize formamides. |
| General description: | Paraformaldehyde is also referred as polyoxymethylene. It participates as an external CO source in the synthesis of aromatic aldehydes and esters. |
| Other Notes: | 2024 CiteAb Award Winner for Supplier Succeeding in Parkinson′s Research ![]() |
| Packaging: | 2.5 kg in poly bottle |
| Packaging: | 25, 100, 500 g in poly bottle |
| Packaging: | 3 kg in poly drum |
| Packaging: | 5 g in glass bottle |
| Symbol | ![]() ![]() ![]() GHS02,GHS05,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H228 - H302 + H332 - H315 - H317 - H318 - H335 - H341 - H350 |
| Precautionary statements | P210 - P280 - P301 + P312 - P304 + P340 + P312 - P305 + P351 + P338 - P308 + P313 |
| Hazard Codes | F,Xn |
| Risk Statements | 11-20/22-37/38-40-41-43 |
| Safety Statements | 26-36/37/39-45 |
| RIDADR | UN 2213 4.1 / PGIII |
| WGK Germany | WGK 2 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 95% |
| mp | 120-170 °C (lit.) |
| Density | 0.88 g/mL at 25 °C (lit.) |
| Storage Temp. | 2-8°C |
| UNSPSC | 12352100 |





