DM DM Hydantoin

Product Name: DMDM Hydantoin
INCI Name: DMDM Hydantoin
Chemical Name: 1,3-Dimethylol-5,5-dimethylhydantoin
CAS Number: 6440-58-0
Molecular Formula: C₇H₁₂N₂O₄
Molecular Weight: 188.18 g/mol
Chemical Class: Formaldehyde-releasing preservative

Description

DMDM Hydantoin is a widely used cosmetic preservative designed to protect personal care and cosmetic formulations against bacterial, yeast, and fungal contamination. It works by slowly releasing small, controlled amounts of formaldehyde, which effectively inhibits microbial growth and extends product shelf life.

It is commonly supplied as a white crystalline powder or as a 50–55% aqueous solution, making it easy to incorporate into water-based formulations. Due to its high efficacy at low concentrations, DMDM Hydantoin is valued for maintaining product safety and stability during storage and consumer use.

Physical & Chemical Properties

• Appearance: White crystalline solid or clear aqueous solution

• Odor: Mild or nearly odorless

• Solubility: Freely soluble in water

• pH Stability Range: ~3.0 – 9.0

• Thermal Stability: Stable under normal cosmetic processing conditions

Functional Benefits

• Broad-spectrum antimicrobial protection

• Effective at low use levels

• Extends shelf life of cosmetic products

• Compatible with many surfactants and cosmetic ingredients

• Cost-effective and reliable preservative system

Typical Usage Levels

• 0.2 – 0.6% (as supplied), depending on formulation and regulatory limits

Applications

• Shampoos and conditioners

• Creams and lotions

• Liquid soaps and body washes

• Facial cleansers

• Personal hygiene products

Safety & Regulatory Notes

• Approved for cosmetic use in many countries within regulated concentration limits

• Must be declared on ingredient labels as DMDM Hydantoin

• Classified as a formaldehyde-releasing preservative, which may be relevant for sensitive skin or “formaldehyde-free” product claims

Storage & Handling

• Store in a cool, dry place

• Keep container tightly closed

• Protect from excessive heat and direct sunlight