1,3-Dimethylurea
CAS 96-31-1
EC 202-498-7
Formula C3H8N2O
MW 88.11 g/mol
Catalysts & Catalyst Precursors Personal Care & CosmeticsPharmaceuticals & HealthcareBiotechnology & Life Sciences Preservation & BiocideCatalysispH Regulation & Buffering
Description
1,3-Dimethylurea (CAS 96-31-1, EC 202-498-7) is a symmetrically substituted urea derivative, also referenced as Sym-Dimethylurea and NSC 24823. It carries no assigned E-code. The compound is classified under HS code 29241900 as a pharmaceutical intermediate.
In pharmaceutical synthesis, 1,3-Dimethylurea serves as a building block for heterocyclic intermediates, where its two N-methyl groups control regioselectivity during cyclisation reactions. In personal care formulations, it functions as an antimicrobial agent and skin conditioner by disrupting microbial cell membranes while supporting the skin barrier. It also acts as a buffering agent in biological assay systems, stabilising pH through its weak base character.
This material is supplied as white crystals meeting pharmaceutical-grade specifications aligned with REACH registration requirements. Procurement teams should confirm lot-specific certificates of analysis covering purity, residual solvents, and heavy metals. Standard packaging formats include fibre drums and multi-layer bags for bulk orders.
In pharmaceutical synthesis, 1,3-Dimethylurea serves as a building block for heterocyclic intermediates, where its two N-methyl groups control regioselectivity during cyclisation reactions. In personal care formulations, it functions as an antimicrobial agent and skin conditioner by disrupting microbial cell membranes while supporting the skin barrier. It also acts as a buffering agent in biological assay systems, stabilising pH through its weak base character.
This material is supplied as white crystals meeting pharmaceutical-grade specifications aligned with REACH registration requirements. Procurement teams should confirm lot-specific certificates of analysis covering purity, residual solvents, and heavy metals. Standard packaging formats include fibre drums and multi-layer bags for bulk orders.
Physical Properties
| Melting Point | 108 °C |
| Boiling Point | 268-270 °C |
| Density | 1.142 g/cm³ |
| Flash Point | 157 °C |
| Appearance | white crystals |
| Color | White |
| Form | Crystals |
| Water Solubility | 765 g/L (21.5 ºC) |
| Vapor Pressure | 6 hPa (115 °C) |
| Refractive Index | 1.4715 (estimate) |
| pH | 9.0-9.5 (100g/l, H2O, 20℃) |
| Log P | -0.783 at 25℃ |
Safety & Handling (Learn More)
Warning GHS08
H
H373
P
P260P319P501
Trade & Regulatory
| HS Code | 29241900 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
N,N'-DimethylureaDMU(CH3NH)2COSym-Dimethylurea1,3-dimethyl-ureN,N′-Dimethylurea
Related Products
Raw Materials
Derivatives
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