VESTINOL® 9 DINP is a diisononyl phthalate (DINP) plasticizer supplied by The Chemical Company for use primarily in flexible PVC and related industrial applications.
Vestinol® 9 DINP (Diisononyl Phthalate) Plasticizer is available for shipping throughout the continental United States with 1 week lead time. Please call (401) 360-2800 for details. The product is delivered in metal drums by truck and railcar, and bulk tanker trucks.
Diisononyl Phthalate (DINP), chemical formula C₆H₄(COOC₉H₁₉)₂, is a clear, colorless, and nearly odorless liquid that is soluble in most organic solvents. DINP is primarily used as a general-purpose PVC plasticizer.
Compared to di-2-ethylhexyl phthalate (DOP), DINP exhibits lower volatility and improved permanence, which helps reduce fume emissions during processing and supports durability in finished products.
DINP is a mixture of isomers composed of C9-length alcohol chains, such as isononyl alcohol. Approximately 95 percent of DINP produced globally is used in PVC applications, with the remainder used in other polymer systems and select non-polymer formulations. For applications requiring higher durability or enhanced weathering resistance, ChemFlexx DPHP may be specified.
Primary Applications
Additional Industrial Uses
Phthalates more broadly are used as viscosity control agents, gelling agents, film formers, stabilizers, dispersants, lubricants, binders, emulsifying agents, and suspending agents across a wide range of industrial markets.
Plasticizers are polymer additives that increase flexibility, elongation, and ease of processing by reducing cohesive intermolecular forces along polymer chains. This allows polymer chains to move more freely, reducing stiffness.
The use of plasticizers began in the mid-1800s, with phthalates becoming dominant in the late 1930s due to their cost efficiency, availability, and processing performance. Today, phthalate esters represent the majority of plasticizer volume, with over 90 percent used in flexible PVC applications.
Standard phthalate esters account for the majority of global plasticizer production due to their low cost, ease of use, and broad performance range. Alternative plasticizer classes include adipates, polymerics, and trimellitates, which are typically specified for higher-temperature or lower-volatility requirements.
VESTINOL® 9 DINP is a phthalate ester plasticizer used primarily to soften polyvinyl chloride. Plasticizers improve flexibility, durability, transparency, and longevity in finished plastic products.
Phthalates were first introduced in the 1920s and quickly replaced earlier plasticizers such as camphor due to improved performance and lower volatility. The commercial availability of PVC in the early 1930s drove rapid growth in phthalate-based plasticizers, including DINP, which remains widely used today.
Phthalate esters are dialkyl esters of phthalic acid produced by reacting phthalic anhydride with alcohols typically containing 6–13 carbon atoms. They are generally colorless, odorless liquids with low volatility and low water solubility, characteristics that support their effectiveness as plasticizers in PVC systems.
28553-12-0 (commonly referenced DINP mixture CAS)
"*" indicates required fields
