C12-15 Alkyl Benzoate

What is it?

C12-15 Alkyl Benzoate is a lightweight oil soluble ester with a beautiful dry skin feel. It is made from benzoic acid and C12–15 alcohols.
INCI

C12-15 Alkyl Benzoate
Appearance

Clear liquid
Usage rate

Manufacturers suggest 1–30% (The CIR does not mention a maximum usage level; tests at 100% concentration showed no reaction or irritation)
Texture

Smooth, thin liquid
Scent

Nothing noticeable
Absorbency Speed

Fast
Solubility

Oil
Polarity

High
Why do we use it in formulations?

C12-15 Alkyl Benzoate adds dry-touch emolliency and improves pigment dispersion in our products, making it a great choice for colour cosmetics. Its light, dry touch also makes it a great base for body oils and other anhydrous products we’d like to have a light, dry finish (it is similar to isopropyl myristate in this way).
Do you need it?

No
Refined or unrefined?

C12-15 Alkyl Benzoate only exists as a refined product.
Strengths

Excellent light-weight emollient that improves slip and reduces greasy feel.
Weaknesses

Not considered natural, can be harder to source.
Alternatives & Substitutions

Isopropyl myristate would probably be my first choice, or a different lightweight ester like Coco-Caprylate, Neossance® Hemisqualane, Isoamyl cocoate, or Isoamyl laurate.

A lightweight silicone like cyclomethicone could work in cold processed formulations.

A very lightweight carrier oil will also work, though that will still be heavier than  C12-15 Alkyl Benzoate.
How to Work with It

Include C12-15 Alkyl Benzoate in the oil phase of your formulations. It can be hot or cold processed.
Storage & Shelf Life

Stored somewhere cool, dark, and dry, C12-15 Alkyl Benzoate should last two years.
Tips, Tricks, and Quirks

C12-15 Alkyl Benzoate is sold under many different trade/brand names; be sure to check the INCI so you know what you’re buying.
Recommended starter amount

50–100mL (2–3fl oz)
Where to Buy C12-15 alkyl benzoate

Buy it from an online DIY ingredient supplier.

Some Formulations that Use C12-15 Alkyl Benzoate

Originally published on February 26, 2019