ACC's High Phthalates Panel Disputes Conclusions of Recent
The American Chemistry Council (ACC) represents the leading companies engaged in the multibillion-dollar business of chemistry. ACC members apply the science of chemistry to make innovative products, technologies and services that make people's lives better, healthier and safer.
High Phthalates Panel Debunks Myths of DINP and DIDP
The American Chemistry Council (ACC) represents the leading companies engaged in the multibillion-dollar business of chemistry. ACC members apply the science of chemistry to make innovative products, technologies and services that make people's lives better, healthier and safer.
ACC challenges listing DINP under Proposition 65 | Food
In a press release published on August 17, 2025, industry association the American Chemistry Council (ACC) announced that it has filed a petition with the US state of California’s Supreme Court challenging the listing of diisononyl phthalate (DINP; CAS 28553-12-0) under the state’s Proposition 65 chemicals regulation.
US-restrict-5-phthalates-childrens - Chemical & Engineering News
The American Chemistry Council (ACC), an association of chemical manufacturers, lashed out at CPSC’s action on one of the substances. “This vote to ban DINP is arbitrary and capricious and proves CPSC isn’t interested in acting based on valid scientific standards,” the group said.
Diisononyl Phthalate (DINP) - Proposition 65 Warnings Website
DINP is one of the phthalates most frequently used in plastic products. Some polyvinyl chloride (PVC, vinyl) flooring, materials used in automobile interiors, wire and cable insulation, gloves, tubing, garden hoses, and shoes. DINP is also used in some non-PVC products, such as some inks and pigments, adhesives, sealants, paints and lacquers.
- How is DINP produced?
- DINP is produced by the esterification of phthalic anhydride with isononanol. Commercially, DINP is not a single compound but rather a complex mixture of phthalate esters having branched alkyl chains with an average chain length of nine. The following sections present the general physical and chemical properties of DINP.
- How did EPA evaluate diisononyl phthalate (DINP)?
- EPA gathered and evaluated physical and chemical property data and information according to the process described in the Systematic Review Protocol for Diisononyl Phthalate (DINP) (U.S. EPA, 2025b).
- Is DINP a plasticizer?
- DINP is a clear, oily, viscous liquid with a mild odor (HSDB, 2015). As a branched phthalate ester, DINP is used as plasticizer that melts around −48 °C (NCBI, 2020; RSC, 2019; NLM, 2015; O'Neil, 2013; NTP-CERHR, 2003).
- Is DINP soluble in water?
- As a branched phthalate ester, DINP is used as plasticizer that melts around −48 °C (NCBI, 2020; RSC, 2019; NLM, 2015; O'Neil, 2013; NTP-CERHR, 2003). DINP is considered insoluble in water with water solubility of 0.00061 mg/L at 20 °C (Letinski et al., 2002) and an octanol:water partition coefficient (log KOW) of 8.8 (ECHA, 2016).
- What is DINP phthalic acid (Diisodecyl phthalate)?
- DINP is typically a mixture of chemical compounds consisting of various isononyl esters of phthalic acid, and is commonly used in a large variety of plastic products. The European Union has set a maximum specific migration limit (SML) from food contact materials of 9 mg/kg food for the sum of diisononyl phthalates and diisodecyl phthalates.
- What is the viscosity of DINP at 25 °C?
- In the final scope document for DINP (U.S. EPA, 2021), a value of 55.334 cP at 25 °C was identified as the viscosity for DINP (De Lorenzi et al., 1998).
