Dimethylolurea
Synonym(s):1,3-Bis(hydroxymethyl)urea;Dimethylolurea;DMU
- CAS NO.：140-95-4
- Empirical Formula: C3H8N2O3
- Molecular Weight: 120.11
- MDL number: MFCD00014414
- EINECS: 205-444-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-27 23:37:55
What is Dimethylolurea?
Chemical properties
white powder
The Uses of Dimethylolurea
In the textile industry in cotton crease- and shrink-proofing, finishing, drying, sizing; in tanning; pesticides; in photographic developers.
The Uses of Dimethylolurea
1,3-Bis(hydroxymethyl)urea is used in preparation method of insulating waterborne polyurethane dispersion coating for electronic and electrical components.
Definition
ChEBI: Oxymethurea is a member of ureas.
Production Methods
Dimethylolurea is produced industrially by the addition of 2 mol of formaldehyde per mole of urea in a stirred vessel. The solution is neutralized with triethanolamine. Urea is added with cooling, and the temperature must not exceed 40 ℃ in this slightly exothermic reaction. After a few hours, the reaction mixture is cooled to room temperature and dihydroxymethylurea crystals form upon cooling. The product is dried in a spray-drying tower.
Flammability and Explosibility
Not classified
Purification Methods
Crystallise it from aqueous 75% EtOH. [Beilstein 3 IV 107.]
Properties of Dimethylolurea
| Melting point: | 125 °C (dec.)(lit.) |
| Boiling point: | 224.08°C (rough estimate) |
| Density | 1.34 |
| refractive index | 1.4610 (estimate) |
| Flash point: | 100 °C |
| storage temp. | 2-8°C |
| pka | 12.14±0.46(Predicted) |
| form | powder to crystal |
| color | White to Almost white |
| Water Solubility | 150 g/L |
| Merck | 14,6968 |
| BRN | 1811870 |
| CAS DataBase Reference | 140-95-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Dimethanolurea(140-95-4) |
| EPA Substance Registry System | Dimethylolurea (140-95-4) |
Safety information for Dimethylolurea
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P337+P313:IF eye irritation persists: Get medical advice/attention. |
Computed Descriptors for Dimethylolurea
| InChIKey | QUBQYFYWUJJAAK-UHFFFAOYSA-N |
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