Butylbenzyl phthalate

BBzP, BBP, Benzyl butyl phthalate; formula: 2-[CH3(CH2)3O2C]C6H4CO2CH2C6H5 or C19H20O4; CAS Registry Number: 85-68-7
Chemical structure of butylbenzyl phthalate (BBzP)
Source: PubChem
Identifier: CID 2347
URL: https://pubchem.ncbi.nlm.nih.gov/compound/2347#section=2D-Structure

Only phthalate of commercial importance with differing side chains, one of them representing a benzyl group

Butylbenzyl  phthalate (BBzP) is a mixed ester of phthalic acid with benzyl alcohol and n-butanol. It was mainly used as plasticizer in PVC products like floorings, wall coverings and upholstery. Together with other polymers (based e.g. on polysulfide, polyurethane, acrylic, polyacrylics, polyvinylacetate, and nitrocellulose) it is present in sealants, adhesives, paints, inks, lacquers, and cosmetics.
BBzP is not chemically bound in the polymer matrix and may outgas and be released upon contact with fluids and fats.
Its degradation in the environment is relatively fast.
BBzP is toxic on reproduction and development in animal experiments. Furthermore, it is suspected to be endocrine disruptive.
It is very toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment.

Since 2015 the general use of BBzP without special authorization is prohibited in the European Union (EU).

For the Environmental Specimen Bank not the parent compound BBzP itself is analysed in human specimens but its major metabolite Mono-benzylphthalate (MBzP).


  • MBzP
    Mono-benzylphthalate is the primary metabolite of Butylbenzyl  phthalate (BBzP) resulting from elimination of the butyl group.


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Sampling area

Sampling period

1988 - 2015