TNPP antioxidant, known by its chemical name Tris(nonylphenyl) phosphite, is one of the important auxiliary antioxidants in the polymer and plastic industries. This compound plays an effective role in increasing the life and quality of final products due to its stabilizing properties against heat, light and oxidation.

Physical and chemical properties

TNPP antioxidant is a colorless to light yellow liquid, odorless, tasteless and non-toxic. This substance is soluble in solvents such as acetone, ethanol, ether, petroleum and carbon tetrachloride, but is insoluble in water. It is easily decomposed in aqueous and acidic environments, which is important in choosing its storage conditions.

Applications of TNPP antioxidant

This antioxidant is used as a stabilizer and preserver of initial properties in many production processes. Some of its most important uses include:

·         In natural rubbers to maintain clarity and prevent yellowing.

·         In synthetic rubbers to improve oxidation and light stability.

·         In plastics, particularly as a stabilizer in styrene-butadiene rubber (SBR), which increases the durability and strength of the product.

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