Dibutyl phthalate

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Dibutyl phthalate
Dibutyl phthalate.svg
Dibutyl phthalate 3D balls.png
Identifiers
CAS number 84-74-2 YesY
PubChem 3026
ChemSpider 13837319 N
UNII 2286E5R2KE YesY
EC number 201-557-4
KEGG C14214 N
ChEBI CHEBI:34687 N
ChEMBL CHEMBL272485 N
RTECS number TI0875000
ATC code P03BX03
Jmol-3D images Image 1
Properties
Molecular formula C16H22O4
Molar mass 278.34 g mol−1
Appearance Colorless oily liquid
Density 1.05 g/cm3 at 20 °C
Melting point −35 °C (−31 °F; 238 K)
Boiling point 340 °C (644 °F; 613 K)
Solubility in water 13 mg/L (25 °C)
log P 4.72
Hazards
R-phrases R50 R61 R62
S-phrases S45 S53 S61
Main hazards N), Harmful (Xi)
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 157 °C (315 °F; 430 K) (closed cup)
Autoignition temperature 402 °C (756 °F; 675 K)
Explosive limits 0.5 - 3.5%
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Dibutyl phthalate (DBP) is a commonly used plasticizer. It is also used as an additive to adhesives or printing inks. It is soluble in various organic solvents, e.g. in alcohol, ether and benzene. DBP is also used as an ectoparasiticide.

Legislative control[edit]

European Union[edit]

The use of this substance in cosmetics, including nail polishes, is banned in the European Union under Directive 76/768/EEC 1976.[1]

The use of DBP has been restricted in the European Union for use in children's toys since 1999.[2]

United States[edit]

DBP was added to the California Proposition 65 (1986) list of suspected teratogens in November 2006. It is a suspected endocrine disruptor. It was used in some nail polishes; all major producers began eliminating this chemical from nail polishes in the Fall of 2006.

DBP was permanently banned in children's toys, in concentrations of 1000 ppm or greater, under section 108 of the Consumer Product Safety Improvement Act of 2008 (CPSIA).

Production[edit]

DBP is produced by the reaction of n-butanol with phthalic anhydride. It is or was produced in the United States by Eastman Chemical Company, but the company announced in March 2011 that it would end production and exit the DBP and DEP (diethyl phthalate) market in December 2011.[3]

With the exodus of all domestic producers the nearest supply option for DBP for U.S. customers is Miami Chemical, a company in Plantation, Florida which imports material from manufacturing partners located in South America.

Exposure[edit]

Based on urine samples from people of different ages, the European Commission Scientific Committee on Health and Environmental Risks (SCHER) concluded that total exposures to individual phthalates in the general population are below tolerable daily intakes (TDI), except in the case of DBP for which efforts to further reduce exposures are needed.[4]

Biodegradation[edit]

The white rot fungus Polyporus brumalis degrades DBP. [5]

See also[edit]

References[edit]

External links[edit]