DIBUTYL PHTHALATE
Commonly Found In
Overview
Dibutyl phthalate (DBP) is a synthetic plasticizer historically used in nail polish formulations to improve flexibility and chip resistance. Classified as a reproductive toxicant (EU CMR Cat 1B), it has been banned in EU cosmetics (Annex II/675) and restricted in South Korea. It forms part of the 'toxic trio' in nail polish alongside toluene and formaldehyde. Most global nail polish brands have removed it from formulations, and consumer demand for 'DBP-free' products has accelerated the transition to alternative plasticizers.
Also known as: Dibutyl Phthalate, DBP, Di-n-butyl Phthalate, n-Butyl Phthalate
Key Benefits
No skin benefits. DBP is used solely as a plasticizer in nail formulations. It provides no therapeutic or conditioning benefit to skin.
Skin Compatibility Ratings
Comedogenic Rating
Non-comedogenic at former cosmetic use levels; however, banned in EU cosmetics and widely restricted globally.
Source: EU Cosmetics Regulation Annex II (banned)
Irritancy Rating
Low direct skin irritancy but classified as reproductive toxicant (CMR Cat 1B in EU); endocrine-disrupting properties documented; dermal absorption occurs
Source: EU CMR classification; CIR assessment
Typical Use Concentration
Range
1β10% (historical nail polish use)
Optimal
Not applicable β banned ingredient in EU/UK
Banned in EU cosmetics (Annex II/675) and UK. Korea bans as cosmetic ingredient with 100 ppm incidental trace limit. Industry has largely self-eliminated it globally.
Works Well With / Avoid
Avoid Combining
Banned in EU/UK cosmetics. Removed from most global nail polish formulations voluntarily. Alternative plasticizers: triphenyl phosphate, adipates.
Commonly Found In
Global Regulation Summary
Overview of current status across major international markets.
Detailed Regional Status
| Region | Status | Max Conc. | Conditions | Source |
|---|---|---|---|---|
| πͺπΊ EU | Banned | - | - | Official β |
| πΊπΈ USA | Allowed | - | - | Official β |
| π―π΅ Japan | Allowed | - | - | Official β |
| π°π· Korea | Banned | 100 ppm (total phthalates) | Prohibited. Unintentional traces allowed up to 100 ΞΌg/g total | Official β |
| π¬π§ UK | Banned | - | Follows EU regulations (II/675) | Official β |
π Why Regulations Differ
The EU banned DBP in cosmetics in 2004 under Annex II/675 as a CMR reproductive toxicant (Category 1B). US and Japan have no cosmetic-specific ban, relying on voluntary industry removal driven by consumer pressure and California Prop 65 requirements. Korea bans it via phthalate group restrictions.
Regulation Analysis
Regional Agreement
Banned in EU, Korea, UK but allowed in USA, Japan.
Category Comparison
There are 122 ingredients in the FRAGRANCE category. 100% are banned in at least one major market.
Strictness Ranking
πΏ Natural Sources
Does not occur naturally. Fully synthetic compound derived from petroleum-based phthalic anhydride.
π How It's Made
Synthesized through esterification of phthalic anhydride with n-butanol in the presence of an acid catalyst (typically sulfuric acid) at 150-200Β°C, followed by purification to remove excess reactants.
π Uses in Cosmetics
Once used in nail polish to make it more flexible and chip-resistant. Now banned in EU cosmetics since 2004 due to health concerns. It was one of three controversial ingredients (along with toluene and formaldehyde) that many nail polish brands have since removed from their products.
π¬ Other Applications
Widely used as plasticizer in PVC products, adhesives, printing inks, cellulose acetate films, and textile lubricants. Also found in insect repellent formulations and some industrial solvents.
π‘ Fun Facts
- β’ One of the 'Toxic Trio' in nail polish (with toluene and formaldehyde) - many nail polish brands now prominently advertise '3-free' or '5-free' formulas excluding these ingredients
- β’ Listed on California Proposition 65 as a reproductive toxicant since 2006, requiring warning labels on products sold in California
- β’ EU classified it as toxic to reproduction (Category 1B) in 2004, leading to its ban in cosmetics under Annex II/675
Data Sources
- β’ EU CosIng database (Annex II/675)
- β’ California Proposition 65 list
- β’ EU CMR classification β Reproductive Toxicant Category 1B
- β’ CIR Expert Panel report on phthalates
Last data verification: 2026-04-16
Related Ingredients
DIETHYLHEXYL PHTHALATE
DIETHYLENE GLYCOL
CITRUS LIMON PEEL OIL
CITRUS PARADISI PEEL OIL
DICHLOROMETHANE
BENZYL ALCOHOL
Learn More
Frequently Asked Questions
Why is DIBUTYL PHTHALATE banned in the EU but allowed in the US?
The EU follows a precautionary principle, banning DIBUTYL PHTHALATE under II/675 due to potential safety concerns. The US FDA has not found sufficient evidence to prohibit its use, allowing it under different safety assessment standards. This reflects differing regulatory philosophies between the two regions.
Why is DIBUTYL PHTHALATE banned in the EU but allowed in Japan?
The EU prohibits DIBUTYL PHTHALATE (II/675) based on their strict safety criteria. Japan's Ministry of Health, Labour and Welfare (MHLW) has evaluated the ingredient and permits its use, potentially with different safety data or usage conditions.
What is DIBUTYL PHTHALATE used for in cosmetics?
DIBUTYL PHTHALATE is primarily used for fragrance in cosmetic products. It also serves as perfuming, plasticiser. The ingredient is commonly found in perfumes, colognes, and scented cosmetics.
Which countries regulate DIBUTYL PHTHALATE?
DIBUTYL PHTHALATE is banned in EU, UK, KR. The ingredient is freely allowed in JP, US.
Are there alternatives to DIBUTYL PHTHALATE?
Due to regulatory restrictions on DIBUTYL PHTHALATE, cosmetic manufacturers often use alternative ingredients with similar functions. For fragrance, alternatives may include other approved ingredients in the same category. Consult product labels for specific formulations, and look for products compliant with your region's regulations.
Disclaimer
The information on this website is for educational and informational purposes only and is not intended as medical advice. While we strive for accuracy based on official government databases, cosmetic regulations change frequently. Always consult with a qualified professional or refer to the latest official regulatory documents for compliance. We are not responsible for any actions taken based on the information provided here.