Paraformaldehyde
ALDRICH/441244 - prilled, 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
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This image depicts SKU: 441244-1KG
This image depicts SKU: 441244-1KG
| assay | 95% |
| autoignition temp. | 572 °F |
| density | 0.88 g/mL at 25 °C (lit.) |
| expl. lim. | 73 % |
| form | prilled |
| InChI | 1S/CH2O/c1-2/h1H2 |
| InChI key | WSFSSNUMVMOOMR-UHFFFAOYSA |
| mp | 120-170 °C (lit.) |
| Quality Level | 200  |
| SMILES string | [O-]#[C+H2] |
| solubility | alcohol and cold water: slightly soluble |
| ethers, hydrocarbons and carbon tetrachloride: insoluble | |
| transition temp | sublimation point 150 °C |
| vapor density | 1.03 (vs air) |
| vapor pressure | <1.45 mmHg ( 25 °C) |
| Application: | Formaldehyde source to prepare phenol-, urea-, furfuryl alcohol-, resorcinol- and melamine-formaldehyde polymers for use in coatings, wood products, textiles and foundry resins. |
| Application: | Paraformaldehyde may be used in the preparation of azomethine ylide, α-methylenechromanes, α-methylenequinoline and ortho-quinone methides. |
| Features and Benefits: | Source of methanol-free formaldehyde. Decomposes in hot water to give formaldehyde. |
| General description: | Paraformaldehyde, a polymerization product of formaldehyde, is used in the polycondensation reaction for the synthesis of thermoset polymers. Paraformaldehyde is also referred as polyoxymethylene. It participates in the regioselective reductive coupling reactions of dienes, alkynes and allenes in the presence of ruthenium catalyst. It also participates in the synthesis of esters, via alkoxycarbonylation of alkenes. |
| Packaging: | 1 kg in poly bottle |
| Packaging: | 3 kg in poly drum |
| 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.) |
| UNSPSC | 12352100 |