Diisononyl phthalate (DINP) is used to soften or “plasticize” polyvinyl chloride (PVC), commonly referred to as vinyl. DINP is a general purpose plasticizer used in a multitude of vinyl products that demand flexibility, durability and specific functionality. While DINP’s primary function is as a softener, it is also used in sealants, paints and lubricants.

determining the physical properties (e.g., degree of flexibility, resistance to heat, durability) of vinyl products. Without the ability to make vinyl flexible, products such as electrical cables and synthetic leather would not exist today.

DINP is extremely effective in a wide range of indoor and outdoor applications. Some of the many key properties of vinyl products with DINP include resistance to changing weather conditions, water resistance, high thermal insulation, long-lasting wear and durability. Its low volatility makes it effective in applications where products are exposed to high temperatures, making them more resistant to degradation.