Ingredient review

Dichloromethane

INCI: DICHLOROMETHANE

Dichloromethane is a strong solvent with significant safety concerns; it is not recommended for routine skincare and is largely banned or restricted in cosmetic products.

beautyskincaresolvent

In plain English

Dichloromethane is a chemical solvent that dissolves oils, greases, and nail polish. It evaporates quickly and has a strong smell. Because it can be harmful if inhaled or absorbed through the skin, it is rarely used in everyday beauty products and is mostly found in industrial or professional nail products under strict ventilation.

Review score

Safety, usefulness, and evidence

1.0Very Poor

1.0/ 5

Higher-caution ingredient

The evidence base is relatively strong for its common cosmetic role.

Main practical flags: irritation is high; clogging risk is low.

Source: synthetic
Evidence: strong
Irritation: high
Clogging risk: low

How reviews are scored

Quick decision guide

Read the cautions before using

Dichloromethane can be useful, but watch for high irritation potential.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

Step 1Start with the score, then check the irritation and clogging risk before judging Dichloromethane.
Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

high

More likely to cause dryness, stinging, peeling, or reactivity if used too aggressively.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

strong

There is a stronger practical or research basis for the ingredient role described here.

What it is

Dichloromethane is a colorless, volatile liquid organic compound used primarily as a solvent in industrial and laboratory settings. In cosmetics, it has been used in nail polish removers and degreasers, but its use is heavily restricted due to toxicity concerns.

How it works

In a cosmetic product, dichloromethane acts as a solvent to dissolve other ingredients, such as nail polish polymers or oils. It evaporates quickly, leaving a clean surface. However, its volatility and potential for inhalation and skin absorption make it unsuitable for leave-on or rinse-off skincare products.

Pros

Strong solvent power

Effectively dissolves tough nail polish and adhesives that weaker solvents cannot handle.

Fast evaporation

Dries quickly, which can speed up professional nail services.

Cons and cautions

High toxicity risk

Inhalation and skin absorption can cause serious health issues, including dizziness, respiratory irritation, and potential long-term cancer risk.

Restricted in cosmetics

Banned or heavily restricted in many countries for cosmetic use; not safe for leave-on or rinse-off skincare products.

Best for

Professional nail technicians using products in well-ventilated areas
Industrial users requiring a strong solvent for non-cosmetic applications

Use caution if

Anyone using cosmetics at home without industrial ventilation
Individuals with respiratory conditions, pregnant women, or those with sensitive skin

Usage tips

Never use products containing dichloromethane in unventilated spaces; always work under a fume hood or with strong exhaust.

Avoid skin contact; wear protective gloves if handling professionally.

Do not use as a substitute for safer solvents like ethyl acetate or acetone in home nail care.

Safety summary

Dichloromethane poses significant health risks including inhalation toxicity, skin irritation, and potential carcinogenicity. It is not recommended for any cosmetic use due to safer alternatives and regulatory restrictions.

Research notes

Multiple regulatory agencies (IARC, EU, Health Canada) have classified dichloromethane as a possible human carcinogen based on animal studies and occupational exposure data. Its use in cosmetics is largely banned or restricted due to these safety concerns.

Common label clues

Typical concentration: Not recommended for leave-on or rinse-off cosmetics; if present, typically below 1% in professional-use nail products
Regulatory status: Banned or restricted in cosmetics in many regions including the EU and Canada; in the US, it is not permitted in cosmetic products intended for consumer use, but may appear in professional-use nail products with labeling and ventilation requirements.
Common uses: Nail polish removers, Industrial degreasers
Environmental note: Dichloromethane is a volatile organic compound (VOC) that contributes to ground-level ozone formation and air pollution. It is not biodegradable and can persist in the environment.

Good to know

Dichloromethane is classified as a Group 2B possible human carcinogen by the International Agency for Research on Cancer (IARC).
The European Union bans dichloromethane in cosmetic products for consumers; professional use is allowed only under strict conditions.

Common questions

What is Dichloromethane in beauty products?

What does Dichloromethane do in a beauty product?

Is Dichloromethane safe for most people?

Who should be careful with Dichloromethane?

Anyone using cosmetics at home without industrial ventilation Individuals with respiratory conditions, pregnant women, or those with sensitive skin

Research sources

IARC Monograph on DichloromethaneOpen European Commission CosIng DatabaseOpen Health Canada Cosmetic Ingredient HotlistOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.