Is Isopropyl Myristate Comedogenic? Why It Clogs Pores

The short answer

Yes, isopropyl myristate, often listed as IPM, rates high on the classic comedogenic scales used in skin care. It is an ester, a light oily molecule that makes products feel silky and dry down quickly. That same property helps it spread and penetrate, which is also why it can end up in a pore. For acne-prone skin, IPM is one of the ingredients most worth checking on a face product. It is not a toxin, and it is not a reason to panic about every label. This is informational, not medical advice.

What IPM is

Isopropyl myristate is made by combining isopropyl alcohol with myristic acid, a 14-carbon saturated fatty acid. The result is an ester that is thin, odorless, and easy to spread. Formulators use it as an emollient, a texture modifier, and sometimes as a carrier for other ingredients. You will find it in lotions, sunscreens, makeup, and hair products, often close to the top of the list because it is used at meaningful levels.

Why it clogs pores

Esters like IPM are oily and lipophilic. They can form a thin film on the surface of the skin and move into the follicle with sebum. Over time, that combination can trap dead skin cells and create a comedone. Because IPM is designed to feel light, people sometimes assume it will not clog. The feel and the clogging potential are not the same thing.

Classic rabbit-ear testing, which underpins many comedogenic scales, placed IPM at the high end of the scale. That is why it appears so often on lists of ingredients to avoid for acne. The data is old and the model has limits, so read the full picture in How the Comedogenic Rating Scale Works.

Who can usually tolerate it

Many people who break out on the face still tolerate IPM on the body, the scalp, or hair, especially when the product is rinsed off. Some people with acne also do fine with small amounts in a product that has other, more protective ingredients. The real question is whether your own skin reacts. A patch test on the jaw or chest for several days is a simple way to find out.

People with very oily or congested skin, or those using strong acne treatments, may be more sensitive to any added oil. In that case, a lighter formula with fewer esters is a better starting point.

Where it hides on labels

IPM appears as Isopropyl Myristate on US labels. Look for it in lotions, serums with a silky feel, makeup primers, and sunscreens. Paste the full ingredient list into the free pore-clogging checker to see whether it is flagged and how it is rated. You can also check the IPM profile page for the source notes.

Common mistakes

• Assuming a light feel means it is safe. Texture is not a measure of pore safety.
• Ignoring it because it is low on the list. A small amount can still matter for very reactive skin.
• Switching products without testing. Change one thing at a time so you can tell what helps and what hurts.
• Treating every ester as the same. Different esters behave differently, and not all are flagged the same way.

Better options for acne-prone faces

Look for water-based moisturizers with glycerin, hyaluronic acid, or niacinamide. A gel-cream or fluid with a short ingredient list is often easier to tolerate. For more guidance, see Non-Comedogenic Moisturizers. For a wider view of flagged names, read Comedogenic Ingredients List. If you are comparing it with plant oils, Is Coconut Oil Comedogenic? covers that ingredient too.

Where to go next

Start with the free pore-clogging checker, then check the profile at /ingredients/isopropyl-myristate/. If you suspect yeast rather than ordinary clogging, Fungal Acne Safe Checker explains the difference. A dermatologist can help if your skin does not settle after you remove suspect products.