DMDM Hydantoin (DMDMH)


  1. Basic Information
INCI Adopted Name: DMDM Hydantoin
CAS Registry No.: 6440-58-0
Molecular Formula: C7H12N2O4
Molecular Weight: 188.18
Structural Formula:
Synonyms: DMDMH;


  1. Quality Specification
Appearance Colorless to light yellow clear liquid
Odor Odorless or characteristically mild
Nitrogen 7.8~8.6%
Specific Gravity( 25℃) 1.14~1.17
pH 5.0~7.0
Total Solids 54~56%
As 0.001% max
Pb 0.004% max.


  1. Packing
    Standard packaging includes the following:

25kg net weight plastic pail

200kg net weight plastic drum

Other package sizes are available upon request.


  1. Storage

Avoid freezing. Store at or near room temperature, out of direct sunlight. Keep containers tightly closed when not in use.

Storage at temperatures below 10°C for a long period of time, may cause formation of crystals, requires thawing and mixing prior to use, with no detrimental effect to product quality or efficacy.


  1. Period of validity

24 months


  1. Properties

Solubility: Very soluble in water; soluble in lower alcohols and glycols.

Antimicrobial Activity: DMDMH is very effective against Gram-positive and Gram-negative bacteria, also provides some protection against yeasts and molds.

Toxicological Data

Acute oral toxicity LD50 (mice): ﹥2000mg/kg
Eye irritation (rabbits): Non-irritating at 0.6% aqueous solution
Primary skin irritation (rabbits): Non-irritating at 0.6% aqueous solution


  1. Applications

The active ingredient, DMDM Hydantoin, is permitted for use in cosmetic and
personal care products in the USA and the EU to a maximum concentration of 0.6%.
Our product is compatible with essentially all cosmetic ingredients, such as surfactants,emulsifiers, proteins, aloe and amines. DMDMH is an excellent preservative for both leave-on and rinse-off products such as shampoos, creams, lotions, bubble baths, rinses, wipes and towelettes.

It is easy to handle, very stable and cost-effective. The recommended use level is 0.1~0.6% by weight of product as supplied.

DMDMH exhibits an excellent synergistic preservative effect in combination with Iodopropynyl Butylcarbamate (IPBC), Parabens and Isothiazolinones. It is stable over a wide range of pH and temperature conditions. It does not discolor product when combined with additives or by changes in pH. It can be added at a wide range of temperatures from ambient to elevated 80℃.