Plasticizer Dipropyl Phthalate (DBP) CAS 131-16-8

Dipropyl Phthalate (CAS No. 131-16-8) Also known as Di-n-propyl phthalate and 1,2-benzenedicarboxylic acid dipropyl ester, this compound has a molecular formula of C14H18O4 and a molecular weight of 250.29 g/mol. It is a phthalate ester formed by the esterification of phthalic acid with two n-propanol molecules.

Dipropyl Phthalate appears as a colorless, transparent liquid. It is nearly insoluble in water under standard conditions while soluble in organic solvents such as ethanol and ether. Key physical parameters include a boiling point of 317.5°C (lit.), a melting point of -31°C, a density of 1.078 g/mL at 25°C, and a refractive index of n20/D 1.497. The substance exhibits good stability and oxidative resistance.

Uses:

In the plastics industry, Dipropyl Phthalate acts as a plasticizer to enhance flexibility, ductility, and processability of materials like polyvinyl chloride (PVC) and polystyrene (PS), particularly for soft plastic products such as pipes, films, and artificial leather. In coatings and inks, it functions as a film-forming aid to reduce curing temperature, improve coating flexibility and gloss, and enhance pigment dispersion and printability.

Method of Preparation:
Dipropyl phthalate is usually prepared by reacting phthalic anhydride or phthalic acid with n-propanol in the presence of a catalyst.

TIANJIN GNEE BIOTECH CO., LTD. is a market-oriented and innovation-driven chemical enterprise. The company adheres to the development concept of "Characteristic, Green and Excellence", and has developed more than 30 kinds of characteristic chemical products in six series by virtue of the strength of scientific and technological innovation.

Highly efficient and scientific management team, strong product research and development strength, mature product quality control, and high-quality after-sales service concepts, ensure the Efficient and scientific management team, strong product research and development, mature product quality control, quality after-sales service concept, to ensure the sustainable development and good competitiveness of the company.

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