Ingredient review

Acetylated Hydrogenated Castor Glyceride

INCI: ACETYLATED HYDROGENATED CASTOR GLYCERIDE

A gentle, semi-synthetic emollient that softens skin and helps other ingredients spread smoothly.

beautyskincareemollient

In plain English

This ingredient is a modified version of castor oil. It's been hydrogenated (made more solid) and acetylated (chemically tweaked) to make it more stable and less greasy. In skincare, it works as an emollient, meaning it softens and smooths the skin by filling in the gaps between skin cells. It also helps other ingredients spread evenly and can make products feel silky without being heavy or sticky.

Quick decision guide

Useful, but context matters

Acetylated Hydrogenated Castor Glyceride is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acetylated Hydrogenated Castor Glyceride.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A semi-synthetic glyceride derived from castor oil through hydrogenation and acetylation. The process improves its stability, texture, and skin feel compared to plain castor oil.

How it works

It forms a thin, non-occlusive film on the skin that reduces water loss and improves smoothness. Its chemical structure allows it to mix well with both oil and water phases in formulas, helping to stabilize emulsions and improve the spreadability of other ingredients.

Pros

Lightweight emollience

Provides softness and smoothness without the heavy, greasy feel of many oils, making it ideal for daytime moisturizers.

Formula-friendly

Helps stabilize creams and lotions, so your product stays mixed and applies evenly every time.

Cons and cautions

Semi-synthetic origin

The chemical modification process may be a turn-off for those seeking fully natural or unprocessed ingredients.

Limited research

While generally considered safe, there are fewer independent studies on this specific derivative compared to simpler oils.

Best for

  • People with dry or rough skin looking for lightweight moisture
  • Anyone who wants a silky, non-greasy feel in their moisturizer

Use caution if

  • Those strictly avoiding any processed or semi-synthetic ingredients

Usage tips

Look for it in the middle of the ingredient list for a balanced emollient effect.
Pair with humectants like glycerin for added hydration.

Safety summary

Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory reviews.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) panel and EU CosIng support its use as a skin-conditioning agent. Most data comes from industry safety dossiers rather than independent clinical trials.

Common label clues

Typical concentration
1% to 10%
Regulatory status
Approved for use in cosmetics by the FDA and EU CosIng database as a skin-conditioning agent and emollient.
Common uses
Moisturizers, Lip products, Hair conditioners, Makeup removers
Environmental note
Derived from castor beans, a renewable resource, but the chemical processing requires energy and may involve solvents.

Good to know

  • It is often used in lip balms and lipsticks for a smooth, non-tacky feel.
  • The acetylation process reduces the risk of rancidity compared to unmodified castor oil.

Common questions

What is Acetylated Hydrogenated Castor Glyceride in beauty products?

This ingredient is a modified version of castor oil. It's been hydrogenated (made more solid) and acetylated (chemically tweaked) to make it more stable and less greasy. In skincare, it works as an emollient, meaning it softens and smooths the skin by filling in the gaps between skin cells. It also helps other ingredients spread evenly and can make products feel silky without being heavy or sticky.

What does Acetylated Hydrogenated Castor Glyceride do in a beauty product?

It forms a thin, non-occlusive film on the skin that reduces water loss and improves smoothness. Its chemical structure allows it to mix well with both oil and water phases in formulas, helping to stabilize emulsions and improve the spreadability of other ingredients.

Is Acetylated Hydrogenated Castor Glyceride safe for most people?

Considered safe for use in cosmetics at typical concentrations. Low irritation and comedogenic risk. No significant safety concerns reported in regulatory reviews.

Who should be careful with Acetylated Hydrogenated Castor Glyceride?

Those strictly avoiding any processed or semi-synthetic ingredients

Research sources

Cosmetic Ingredient Review (CIR) – Safety AssessmentOpenEU CosIng Database – Acetylated Hydrogenated Castor GlycerideOpenPubMed – Castor Oil Derivatives in CosmeticsOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.