Retinaldehyde
All-trans-retinaldehyde / Retinal / Vitamin A aldehyde
Retinal (one step before retinoic acid); more potent than retinol; faster conversion to retinoic acid in skin; subject to EU 0.3% retinol equivalent limit; significant irritation potential especially at first use; typically formulated at <0.1% by brands; pregnancy precautionary avoidance applies; emerging ingredient in prestige anti-aging segment
Function & Common Use
Active (retinoid)
Active Ingredient
High-performance anti-aging serums
Synthetic
Concentration Limits
No formal limit
0.3% as retinol equivalent (EU Annex III total retinoid limit)
No specific 21 CFR cosmetic limit identified in source checked; EU limit reference: 0.3% as retinol equivalent (EU Annex III total retinoid limit)
No specific MFDS limit identified in source checked; verify if ingredient is used in a Korean functional cosmetic category
Format restriction: Leave-on
Baby restriction: Avoid in pregnancy; not for infants
Pregnancy: Caution during pregnancy; retinaldehyde converts to retinoic acid in skin. Precautionary avoidance during first trimester recommended.
Frequently Asked Questions
Is Retinaldehyde safe to use in skincare?
Retinaldehyde has a Medium concern rating. Retinal (one step before retinoic acid); more potent than retinol; faster conversion to retinoic acid in skin; subject to EU 0.3% retinol equivalent limit; significant irritation potential especially at first use; typically formulated at <0.1% by brands; pregnancy precautionary avoidance applies; emerging ingredient in prestige anti-aging segment
Is Retinaldehyde allowed in India?
Retinaldehyde is currently classified as "Permitted" under Indian cosmetics regulations. The maximum permitted concentration is No formal limit.
What is Retinaldehyde used for in cosmetics?
Retinaldehyde functions as: Active (retinoid). It is commonly found in: High-performance anti-aging serums.
Can Retinaldehyde cause an allergic reaction?
Yes. Retinaldehyde has an allergen flag (Yes). If you have sensitive skin or known fragrance/contact allergies, patch-test products containing this ingredient before full use.
Is Retinaldehyde safe for babies?
Retinaldehyde has baby/child restrictions: Avoid in pregnancy; not for infants. Avoid using products containing this ingredient on infants unless specifically formulated and labelled for baby use.
Regulatory Status
EU Annex: Annex III
Identifiers
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