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Dimethylhydantoin

CAS Number
77-71-4
EC Number
201-051-3
Chemical Formula
C5H8N2O2
Molecular Weight
128.13 g/mol

Description

Dimethylhydantoin ( CAS 77-71-4 ), commercially known as DMH or Dantoin DMH, is a cyclic urea derivative used across pharmaceutical, personal care, and specialty chemical manufacturing. It functions primarily as a building block for active intermediates. The compound acts as a buffering agent and a precursor in biocide synthesis. In personal care formulations, DMH is the backbone of DMDM hydantoin, a widely produced preservative system used in shampoos and skin care products. Pharmaceutical manufacturers use it as an intermediate in synthesizing hydantoin-derived APIs, where its ring structure enables controlled chemical modification. This versatility makes it essential for various medical applications. In industrial water treatment and antimicrobial formulations, DMH serves as a precursor to halogenated hydantoins. These are chlorine- and bromine-releasing biocides used in cooling towers and pool sanitation systems. Specialty chemical producers also use it as a pH buffer in reaction systems requiring stable mildly acidic conditions. This ensures consistent results during complex chemical manufacturing processes and industrial reactions. Dimethylhydantoin is supplied as a white crystalline powder. Technical grade is the standard commercial form, with pharmaceutical-grade material available for API synthesis and regulated applications requiring high purity. Bulk quantities are typically offered in multi-kilogram bags or fiber drums. Smaller packaging is also available for laboratory and development use to meet the specific needs of research facilities and small-scale production. Contact us for supply of Dimethylhydantoin Request Quote

Other Names (Synonyms)

5,5-DIMETHYLHYDANTOIN | 2,4-Imidazolidinedione, 5,5-dimethyl- | Dantoin DMH | 5,5-Dimethyl-2,4-imidazolidinedione | Dantoin 736 | Hydantoin, 5,5-dimethyl- | DM HYDANTOIN | DMH

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point178 °C
Boiling Point237.54°C (rough estimate)
Density1.261 g/cm³
Flash Point193°C
Appearancewhite to off-white crystals or crystalline powder
ColorWhite to off-white
FormCrystalline Powder or Crystals
Water Solubilitysoluble
Refractive Index1.4730 (estimate)
Log P-0.480

Trade & Regulatory

HS Code29332100
Storage Class11 - Combustible Solids
WGK (Germany)2