Risk Evaluation for Di-isononyl phthalate (DINP) (1,2-Benzene- dicarboxylic acid, 1,2- diisononyl ester)
EPA granted the manufacturer request for risk evaluation for di-isononyl phthalate (DINP) (1,2-benzenedicarboxylic acid, 1,2-isononyl ester) in December 2019, and this category of chemicals is currently undergoing risk evaluation.
On this page:
DINP is a common chemical name for the category of chemicals that includes the following substances: 1,2-benzenedicarboxylic acid, 1,2-isononyl ester and 1,2-benzenedicarboxylic acid, di-C9-11-branched alkyl esters, C9-rich. The primary use for DINP is as a plasticizer in plastic and rubber products. Information from the 2016 Chemical Data Reporting (CDR) for DINP indicates the reported production volume is between 200 million and 500 million lbs/year (domestic manufacture including import).
In the final scope of the DINP risk evaluation, EPA identified conditions of use associated with the importing; processing; distribution in commerce; industrial, commercial and consumer uses; and disposal of DINP, including:
- As a plasticizer in polyvinyl chloride (PVC);
- In building and construction materials;
- In automotive care and fuel products; and
- In other commercial and consumer products, including adhesives and sealants, paints and coatings, electrical and electronic products, and other plastic and rubber products.
The above listed conditions of use are ways that a person or the environment could be potentially exposed to this chemical. However, when conducting a risk evaluation, EPA also considers the hazards (i.e. health effects or environmental impacts) that could occur from coming in contact with a chemical.
In August 2021, EPA published the final scope document outlining the hazards, exposures, conditions of use, and the potentially exposed or susceptible subpopulations the agency expects to consider in its risk evaluation. The agency released the draft scope in November 2020 and took public comments on the draft document.
- Read the final scope of the risk evaluation for DINP and EPA's response to comments on the draft scope.
- Read the supporting and decision documents for this manufacturer-requested risk evaluation.
As EPA continues to move through the risk evaluation process, there will be additional opportunities for public comment, including a public comment period on the draft risk evaluation. In addition to public comment periods, EPA will continue to engage with stakeholders as it develops the risk evaluation, and stakeholders should reach out to EPA via the staff contact to engage with the agency.