Manufacturer-Requested Risk Evaluation of Diisononyl Phthalate (DINP
Manufacturer-Requested Risk Evaluation of Diisononyl Phthalate (DINP) Documents supporting the TSCA section 6 manufacturer request for risk evaluation submitted by ExxonMobil Chemical Company, Evonik Corporation, and Teknor Apex, through the American Chemistry Council’s High Phthalates Panel, are provided below.
Risk Evaluation for Di-isononyl phthalate (DINP) (1,2-Benzene
EPA granted the manufacturer request for risk evaluation for di-isononyl phthalate (DINP) (1,2-benzenedicarboxylic acid, 1,2-isononyl ester) in December 2025, and this category of chemicals is currently undergoing risk evaluation. Learn more about manufacturer-requested risk evaluations.
Risk Evaluation for Di-isononyl phthalate (DINP) (1,2-Benzene
EPA granted the manufacturer request for risk evaluation for di-isononyl phthalate (DINP) (1,2-benzenedicarboxylic acid, 1,2-isononyl ester) in December 2025, and this category of chemicals is currently undergoing risk evaluation. Learn more about manufacturer-requested risk evaluations.
Di-isononyl Phthalate (DINP); Manufacturer Request for Risk Evaluation
What is di-isononyl phthalate (DINP)? DINP is a phthalate used as a plasticizer and paint additive in consumer and commercial products, as well as numerous manufacturing applications. There are two commercial products the manufacturer submitted for risk evaluation under the name DINP.
List of Manufacturer-Requested Risk Evaluations under TSCA
Diisononyl Phthalate (DINP) On May 24, 2025, EPA received a request from the ExxonMobil Chemical Company, Evonik Corporation, and Teknor Apex, through the American Chemistry Council’s High Phthalates Panel, to conduct a risk evaluation for diisononyl phthalate (DINP).
- When did EPA release a risk evaluation for diisononyl phthalate (DINP)?
- In January 2025, EPA released the final risk evaluation under the Toxic Substances Control Act (TSCA) for diisononyl phthalate (1,2-benzenedicarboxylic acid, 1,2-isononyl ester) (DINP). EPA granted the manufacturer request for risk evaluation for DINP in December 2019. Learn more about manufacturer-requested risk evaluations.
- Is Di-isononyl phthalate (DINP) benzenedicarboxylic acid a risk?
- 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 the chemical is currently undergoing risk evaluation.
- Did EPA request a risk evaluation for DINP & DIDP?
- On May 24, 2019, EPA received requests to conduct risk evaluations for both DINP and DIDP from ExxonMobil Chemical Company, Evonik Corporation, and Teknor Apex, through the American Chemistry Council's High Phthalates Panel (ACC HPP). In December 2019, EPA notified ACC HPP that the Agency had granted their manufacturer requested risk evaluations.
- What does TSCA stand for in diisononyl phthalate (DINP)?
- The Environmental Protection Agency (EPA or Agency) is announcing the availability of the final risk evaluation under the Toxic Substances Control Act (TSCA) for diisononyl phthalate (DINP) (1,2-Benzene- dicarboxylic acid, 1,2- diisononyl ester) (CASRN 28553- 12-0).
- Are DIDP and DINP phthalates a non-cancer hazard?
- For both DIDP and DINP, liver and developmental toxicity are indicated as the most sensitive and robust non-cancer hazards. However, these two phthalates differ in several important respects regarding their human health hazard profiles.
- Does DINP cause phthalate syndrome?
- Therefore, EPA is including DINP in its cumulative risk analysis for six phthalates that demonstrate effects consistent with phthalate syndrome. Workers may be exposed to DINP when making products or otherwise using DINP in the workplace.
