5,5-Dimethylhydantoin
CAS 77-71-4
EC 201-051-3
Formula C5H8N2O2
MW 128.13 g/mol
Heterocyclic Compounds Personal Care & CosmeticsPharmaceuticals & HealthcareBiotechnology & Life Sciences Preservation & BiocideCatalysispH Regulation & Buffering
Description
5,5-Dimethylhydantoin (CAS 77-71-4) is a cyclic urea derivative supplied as a crystalline powder, also known under trade names Dantoin DMH and Dantoin 736, with the abbreviation DMH. It carries no assigned E-code. It is registered under REACH and classified within the heterocyclic compounds category (HS 2933.21.00).
In personal care formulations, DMH functions as a precursor to DMDM hydantoin-based preservative systems, releasing controlled levels of formaldehyde to inhibit microbial growth. In pharmaceutical and biotech applications, it serves as a pH buffer and reaction catalyst, stabilising process conditions in synthesis and fermentation workflows.
This material is available in technical and cosmetic-grade forms, supplied in compliance with REACH regulations. Standard packaging includes 25 kg bags or fibre drums, with bulk options on request. Buyers should confirm grade suitability against relevant pharmacopoeial or industry specifications prior to procurement.
In personal care formulations, DMH functions as a precursor to DMDM hydantoin-based preservative systems, releasing controlled levels of formaldehyde to inhibit microbial growth. In pharmaceutical and biotech applications, it serves as a pH buffer and reaction catalyst, stabilising process conditions in synthesis and fermentation workflows.
This material is available in technical and cosmetic-grade forms, supplied in compliance with REACH regulations. Standard packaging includes 25 kg bags or fibre drums, with bulk options on request. Buyers should confirm grade suitability against relevant pharmacopoeial or industry specifications prior to procurement.
Physical Properties
| Melting Point | 178 °C |
| Boiling Point | 237.54°C (rough estimate) |
| Density | 1.261 g/cm³ |
| Flash Point | 193°C |
| Appearance | white to off-white crystals or crystalline powder |
| Color | White to off-white |
| Form | Crystalline Powder or Crystals |
| Water Solubility | soluble |
| Refractive Index | 1.4730 (estimate) |
| Log P | -0.480 |
Trade & Regulatory
| HS Code | 29332100 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
5,5-dimethylimidazolidine-2,4-dioneDMHDantoin DMHDantoin 736DM HydantoinDimethylhydantoin
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