Hydrogenated Microcrystalline Wax

What is Hydrogenated Microcrystalline Wax?

Hydrogenated Microcrystalline Wax is a purified, solid hydrocarbon mixture derived from petroleum refining processes. It originates from crude oil residues, where dewaxing yields microcrystalline wax, followed by hydrogenation to saturate bonds and enhance stability. This results in a hard, opaque, high-melting-point material (around 60-90°C) composed of branched and linear alkanes with carbon chains of 30-100 units. Commonly featured in makeup like lipsticks, mascaras, and eyeliners, as well as creams and ointments, it excels in solid and emulsion-based products. It works by creating a structured network that holds particles together, thickens formulations to prevent settling, and reinforces interfacial films to maintain emulsion integrity during storage and use. Its non-reactive, occlusive properties contribute to smooth texture and product durability without altering active ingredients.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 2 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Binder

Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.

Emulsion stabilizer

Improves emulsion robustness by preventing droplet coalescence and phase separation, often by thickening, structuring, or strengthening the interfacial layer.

Viscosity controlling agent

Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Supports cohesive structure in solid cosmetics like sticks for better integrity.

Maintains emulsion uniformity by strengthening droplet barriers against separation.

Optimizes flow and thickness for pleasant texture and precise application.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Users of long-wear makeup seeking durable, non-dripping formulas.	People with rare hypersensitivity to hydrocarbon waxes.
Individuals preferring stable creams and lotions that resist separation.	Individuals avoiding petroleum-sourced ingredients.
Those wanting non-comedogenic thickeners in oilier formulations.	Users opting exclusively for botanical-derived alternatives.

Safety Notes

Considered low hazard in cosmetic safety assessments.
Typically non-irritating and non-sensitizing in formulation use.

Frequently Asked Questions about Hydrogenated Microcrystalline Wax

What is hydrogenated microcrystalline wax?

A refined petroleum wax used to structure and stabilize solid and emulsion cosmetics.

Is it safe for skin?

Safety reviews indicate low hazard and minimal irritation risk in typical concentrations.

Does it cause acne?

No, it has a comedogenic rating of zero, suitable for pore-friendly products.