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BENZALDEHYDE DIMETHYLACETAL.

Optional CAS 1125-88-8 / PERFUMING

A sophisticated aromatic acetal primarily utilized in high-end formulations to provide a controlled release of almond and cherry scent profiles. It serves as a stabilized precursor to benzaldehyde, allowing for more nuanced fragrance delivery than the volatile parent molecule alone.

perfuming masking

Science

Functions as a 'pro-fragrance' or molecular masking agent. Upon contact with the skin's naturally acidic environment or water-based systems (pH < 7), the molecule undergoes a slow-release hydrolysis process, converting into benzaldehyde and subsequently metabolizing into benzoic acid on the skin surface.


Research

Medium confidence
Effective range 0.1–0.5%
Optimal

0.2%

Key findings

  1. 01 Established as the upper limit for safety in fine fragrances to ensure no sensitization occurs during consumer use.
  2. 02 Effective at trace amounts for providing high-impact almond top notes without altering the core formula performance.

Transparency

Not commonly dusted
Min. effective
0.1%
Red flag below
0.01%

As a fragrance component, it is intentionally used at very low concentrations. It is rarely 'dusted' because its only function is aromatic; if a brand claims it as an active skin-benefit ingredient, that would be a red flag.


The Formula

Solubility
Oil
Optimal pH 7 – 9
0 7 14

Stability

Highly stable in alkaline conditions but degrades rapidly into benzaldehyde and methanol in acidic environments (pH 4.5–5.5), which are standard for most skincare.

Synergies

  • Oil-based carriers
  • Anhydrous systems
  • Alkaline cleansing agents

Conflicts

  • L-Ascorbic Acid
  • Alpha Hydroxy Acids
  • Oxidizing agents
  • Water-based serums without stabilizers

Safety

CIR Status
Safe as used
Max tested
0.5%
Pregnancy
Safe
Sensitization risk Low

Safe for cosmetic application based on the safety profile of its metabolite, Benzaldehyde. Maximum usage is typically capped at 0.2% for leave-on facial products.


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Optional

A precision fragrance precursor useful for specific olfactory profiles but offers no therapeutic biological benefits to the skin.


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