- Basic Information
| INCI Adopted Name: | DMDM Hydantoin |
| CAS Registry No.: | 6440-58-0 |
| Molecular Formula: | C7H12N2O4 |
| Molecular Weight: | 188.18 |
| Structural Formula: | |
| Synonyms: | DMDMH; 1,3-Dihydroxymethyl-5,5-Dimethylhydantoin |
- 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. |
- Packing
Standard packaging includes the following:
25kg net weight plastic pail
200kg net weight plastic drum
Other package sizes are available upon request.
- 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.
- Period of validity
24 months
- 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 |
- 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℃.