Diisononyl phthalate (DINP) - Wiley Online Library
Synonyms: Phthalic acid, diisononyl ester, bis(3,5,5-trimethylhexyl) phthalate, DINP Diisononyl phthalate (C26H42O4)isamixture of phthalic acid esters on the basis of amixture of isomeric nonanols. As aresult of manufacturing conditions there are two different diisononyl phthalate products with different CAS numbers ([28553-
Diisononyl phthalate (DINP) [Air monitoring methods, 2013]
DINP is produced by the reaction of phthalic acid anhydride with iso‐nonyl alcohol using a titanium catalyst. DINP is a clear, colourless liquid with a very slight odour (molar mass 418.6 g/mol, melting point –48°C, boiling range 253–267°C at 7 hPa, vapour pressure
Biomonitoring Summary | CDC
Di-isononyl phthalate (DiNP) is a mixture of phthalates with branched alkyl side chains of varying length (C8, C9, and C10). DiNP is primarily used to produce flexible plastics and has replaced di-2-ethylhexyl phthalate (DEHP) in some plastics, though not in medical products.
Addition of Diisononyl Phthalate Category Proposed Rule
Rule Summary In August 2025, EPA issued a supplemental proposed rule to add a Di-isononyl phthalate (DINP) category to the list of toxic chemicals subject to the Toxics Release Inventory (TRI) reporting requirements under the Emergency Planning and Community Right-to-Know Act (EPCRA) and the Pollution Prevention Act (PPA).
Diisononyl Phthalate (DINP) - Proposition 65 Warnings Website
DINP is one of the phthalates most frequently used in plastic products. DINP is used in various types of plastic consumer products, including: Some polyvinyl chloride (PVC, vinyl) flooring, materials used in automobile interiors, wire and cable insulation, gloves, tubing, garden hoses, and shoes.
- How is diisononyl phthalate (DINP) measured?
- This method allows the simultaneous determination of gaseous and particulate diisononyl phthalate (DINP) occurring in the workplace air. A flow‐regulated pump is used for sampling by drawing ambient air through a sampling system consisting of a cellulose acetate filter and three silica gel tubes connected downstream.
- 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).
- How are people exposed to diisononyl phthalate?
- Monitoring and use data indicate that the general population may be exposed to diisononyl phthalate via inhalation of ambient air, ingestion of food, and dermal contact with consumer products containing diisononyl phthalate (SRC). (1) NIOSH; NOES. National Occupational Exposure Survey conducted from 1981-1983.
- What is diisononyl phthalate (DINP)?
- Diisononyl phthalate (DINP) has been widely used in polyvinyl chloride (PVC) products and is ubiquitous as a substitute; however, its toxicity due to exposure remains to be determined.
- What are Di-isononyl phthalate esters (dinps)?
- Di-isononyl phthalate esters (DINPs) are endocrine-disrupting chemicals and have replaced di (2-ethylhexyl) phthalate (DEHP) as the major plasticizer for poly (vinyl chloride) (PVC) products in recent years. Exposure marker discovery of DINPs is crucial, because of their high potential for human exposure and toxicity.
- What phthalate is present in the workplace air?
- Long-chain phthalates such as diisononyl phthalate, di- n -decyl phthalate, diisodecyl phthalate, diundecyl phthalate and didodecyl phthalate present in the workplace air in the gaseous and particulate state can be simultaneously determined in a concentration range of 0.70 to 14.0 mg/m 3 with this analysis method.
