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METHYLAL.

Questionable CAS 109-87-5 / SOLVENT

Methylal is a rapidly evaporating solvent employed in cosmetic formulations to effectively dissolve other ingredients and facilitate product spreadability. Its low viscosity allows for improved texture and its quick dissipation can impart a transient cooling sensation upon skin application.

Solvent Formulation Aid Cooling Agent

Science

As a primary solvent, Methylal exhibits excellent dissolving power and low viscosity, serving as a crucial vehicle or formulation aid within cosmetic products. Its characteristic rapid evaporation assists in quick drying formulations and can contribute a noticeable cooling effect on the skin.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH 4.5 – 6.6
0 7 14

Stability

Methylal generally maintains stability in the presence of alkalis and mild acids. However, it is susceptible to hydrolysis in aqueous acidic solutions, which can lead to the formation of formaldehyde and methanol. It is incompatible with strong oxidizing agents and highly acidic compounds.

Conflicts

  • strong oxidizing agents
  • strong acids

Safety

CIR Status
Not reviewed
Sensitization risk Unknown

Methylal (Dimethoxymethane) has not undergone specific safety assessments by key regulatory bodies such as CIR, SCCS, or FDA for cosmetic application. While general toxicity is considered low, it is identified as an irritant to the skin and eyes, and its vapors can irritate the nose and throat. Skin contact may also lead to dryness.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Questionable

Methylal effectively functions as a solvent and formulation aid, yet its classification as a moderate irritant and lack of formal cosmetic safety review make its inclusion questionable.


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