Butyl Benzyl Phthalate

What Is It?

Butyl Benzyl Phthalate is a clear, oily liquid. In cosmetics and personal care products, Butyl Benzyl Phthalate may have use in nail polish and enamel.

Why Is It Used?

Butyl Benzyl Phthalate is a plasticizer. It softens synthetic polymers by reducing brittleness and cracking.

Scientific Facts

Butyl Benzyl Phthalate is an aromatic ester.

Safety Information

The Food and Drug Administration (FDA) has approved the use of Butyl Benzyl Phthalate as an indirect food additive for use in items that come in contact with food including, adhesives, paper and paper board and polymers. The safety of Butyl Benzyl Phthalate has been assessed by the Cosmetic Ingredient Review (CIR) Expert Panel. On the basis of the scientific data, the CIR Expert Panel concluded that Butyl Benzyl Phthalate was safe for use as a cosmetic ingredient.

CIR Safety Review: Butyl Benzyl Phthalate (BBP) is an aromatic ester that is used as a plasticizer at concentrations below 1.0%. Oral feeding tests in the laboratory showed a low level of toxicity. However, exposure to high doses of BBP led to weight loss, testicular atrophy, hemorrhages, and hepatomegaly. BBP was not found to be a reproductive toxin, however, BBP caused dose-dependent microscopic degenerative changes in the testes. BBP was nonmutagenic in bacteria, L5178Y TK mouse lymphoma mutagenesis assay, dominant lethal mutagenicity assay, and a BALB/3T3 cell transformation assay. BBP was not carcinogenic in studies involving laboratory animals. In human dermal studies, BBP was not a significant irritant or sensitizer. On the basis of data presented in the CIR report, the CIR Expert Panel concluded that Butyl Benzyl Phthalate was a safe as a cosmetic ingredient in the present practices of use and concentration.

More information about phthalates

FDA: Link to the Code of Federal Regulations for Butyl Benzyl Phthalate:

Butyl Benzyl Phthalate is prohibited in cosmetics products marketed in the European Union. See Annex II.

Link to the EU Cosmetic Regulation: 

More Scientific Information

Butyl Benzyl Phthalate is the ester of butyl alcohol, benzyl alcohol and phthalic acid. Other technical names for Butyl Benzyl Phthalate include 1,2-Benzenedicarboxylic Acid, Butyl Phenylmethyl Ester and Phthalic Acid, Benzyl Butyl Ester.


National Toxicology Program (NTP) summary information on Butyl Benzyl Phthalate

Search the Code of Federal Regulations http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm

EU Cosmetics Inventory http://ec.europa.eu/consumers/cosmetics/cosing/