Isostearic Acid

0-6 month old newbornsSkin contact product

Check for Different Age (6 available)

Is this safe for 0-6 month old newborns to use Isostearic Acid?

YES - Generally Safe
Danger Score: 3 (Lower is safer)
Quick Answer: Isostearic Acid is generally considered safe for 0-6 month old babies when used in topical products. Always consult your pediatrician for newborns.

ℹ️General Overview

For newborns and babies under 6 months, this ingredient is generally low risk but data are limited. Because baby skin is very delicate, I recommend extra caution.

What to Do

Prefer products made and labeled for infants. Avoid applying products with this ingredient to very young babies unless necessary. Do not use concentrated ingredient forms on baby skin. If you must use a product with isostearic acid, use a small amount on a small area first and watch for irritation. Stop use and see a doctor if you notice a rash, persistent redness, swelling, or eye irritation.

⚠️Warnings

Watch for skin redness, rash, or stinging—stop use if these occur. Cosmetic Ingredient Review notes that this ingredient can increase skin absorption of other substances and has gaps in safety data; the National Toxicology Program found some weak hormone-related signals in studies. If your baby has very sensitive skin, eczema, or broken skin, avoid this ingredient and choose products made specifically for newborns.

Confidence: MEDIUM

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Safety Risk Labels

This ingredient has the following documented risks:

Absorbed: A published study on fatty acid isomers found this ingredient can act as a skin penetration enhancer. That means it can help itself and other ingredients get through skin and into the body (study on fatty acid isomers, 1989).
Hormones: A government toxicology review reports one or more studies showing weak endocrine (hormone) effects. This means it may change how normal hormones work in the body (National Toxicology Program).
Environmental: A national environmental agency has flagged this chemical as suspected to be toxic to the environment, so it could harm wildlife or ecosystems if released (Environment Canada).

Tap or hover over labels to see detailed risk information.

Alternative Names for Isostearic Acid

This ingredient may also be listed as:

isostearic acidCAS-30399-84-9C20356MFCD00044082J-016709NCGC00164392-02NCGC00164392-01ISOSTEARIC ACID, >=97% (CAPILLARY GC)AS-57253W-109211NCGC00255115-01

Always check ingredient labels carefully, as ingredients may be listed under different names.

Products Containing Isostearic Acid

This ingredient is found in the following products:

This list shows products that contain Isostearic Acid or its alternative names.

Common Questions About Isostearic Acid

Is this ingredient safe for newborns to use Isostearic Acid?

Yes, Isostearic Acid is generally considered safe for 0-6 month old babies based on current research.

What are the absorbed risks of Isostearic Acid for newborns?

Can be absorbed through the skin and get into the bloodstream. This is especially important for babies whose skin and systems are still developing.

What are the hormones risks of Isostearic Acid for newborns?

May mess with natural hormone development in babies and children. This is especially important for babies whose skin and systems are still developing.

What are the environmental risks of Isostearic Acid for newborns?

Possible negative effects on the environment This is especially important for babies whose skin and systems are still developing.

What products contain Isostearic Acid?

Isostearic Acid is commonly found in skincare products, cosmetics, and topical applications. Always check ingredient labels before use.

When can infants start using products with Isostearic Acid?

The appropriate age depends on the specific ingredient properties and concentration. This analysis is for 0-6 month old babies. Use the age selector above to check other ages.

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