Myristyl Myristate

Overview

Myristyl myristate is the ester of myristyl alcohol and myristic acid — both 14-carbon chains derived from coconut or palm kernel oil. It comes as small white flakes or beads with a melting point around 38-42 C, lower than cetyl palmitate. That lower melting point gives it a faster, more “melt-on-skin” feel.

In a finished cream it is invisible. You would never look at a moisturiser and identify myristyl myristate as the ingredient making it feel that way. But it is one of the underused workhorses of premium European cosmetics, where it appears in cold creams, ampoule-style night treatments, and rich body butters.

The reason it gets used over cetyl palmitate: myristyl myristate gives a smoother, more “cushion-then-melt” feel rather than the firmer “wax” feel of cetyl palmitate. The difference is subtle but real.

Shelf life is 2-3 years.

What it does in a formula

Three jobs:

• Texture enhancer. A 2-4% addition gives lotions a cushioned, almost cold-cream feel that signals “expensive” to the user.
• Co-emulsifier and stabiliser. It is not a primary emulsifier but it improves emulsion structure at higher temperatures and adds body to the oil phase.
• Wax structure in sticks. In deodorant sticks, balm sticks, and solid colognes, it adds smooth glide without the harder “skid” that beeswax can give.

It melts cleanly on skin (around body temperature) and leaves a soft, smooth finish rather than a draggy wax film.

How to use

Add to the oil phase. Heat above the melting point — 50-55 C is enough to fully liquefy. Like all wax-esters, it must be fully melted before emulsifying or you will get little flecks in the finished product.

Usage rates by product type:

• Face creams (cold-cream style): 2-5%
• Light face lotions: 1-2%
• Body lotions: 2-4%
• Rich body butters: 3-8%
• Stick products (deodorants, balms): 5-10%
• Lip balms: 3-8%
• Solid perfumes: 5-10%
• Hair pomades: 2-6%

It pairs naturally with cetearyl alcohol, behenyl alcohol, and other co-emulsifiers to fine-tune the texture of a lotion.

Best for / Worst for

Best for: premium-feeling face creams, eye creams, body butters for dry skin, stick deodorants, lip balms with a smooth (rather than waxy) glide, classic cold-cream formulations, baby creams.

Worst for: gel and “watery” textures (it adds body that fights a light feel), very oily skin face products (the texture is rich), strict “minimum ingredients” formulations (it is one more ingredient that does subtle work — easy to cut and not notice immediately).

Common pitfalls

Adding it cold. Like cetyl palmitate, it must be fully melted. If you add it after the rest of the oil phase has cooled, you will get tiny waxy specks in the cream.

Confusing it with isopropyl myristate. Isopropyl myristate is a liquid ester, very different in feel and behaviour. Myristyl myristate is a wax. Both are myristate esters; that is where the similarity ends.

Using too much. Above 6% in a lotion, the cushioning starts feeling heavy. For face creams, 2-4% is the sweet spot. For body butters, 5-8% works.

Expecting it to replace a full emulsifier. It is a co-emulsifier at best. You still need a primary emulsifying wax or oil-in-water emulsifier to hold the formula together.

Substitutes

• Cetyl palmitate — slightly firmer, more wax-like feel.
• Cetyl alcohol — more creamy, less wax character.
• Stearyl palmitate — firmer, higher melting point.
• Behenyl alcohol — firmer feel, more conditioning.
• Jojoba wax esters — softer, slightly more buttery feel.