Construction Chemistry

Phthalic Anhydride

Formula: C₈H₄O₃ GOST/CAS: ГОСТ 7119-77 / CAS 85-44-9

Phthalic anhydride (orthophthalic acid anhydride) is an important organic compound consisting of white lustrous flakes or crystals with a characteristic pungent odor. The product is obtained on an industrial scale by the catalytic oxidation of ortho-xylene or naphthalene. Due to its high reactivity, phthalic anhydride is a crucial basic raw material for the chemical industry. It is widely used in large-scale organic synthesis to produce plasticizers, synthetic resins, dyes, and many other chemical products.

Applications

Production of plasticizers: The main component for the synthesis of phthalates (DOP, DBP, DINP), which are added to impart flexibility, elasticity, and strength to PVC products (linoleum, cables, films).

Paint and coatings industry: A key raw material for the production of alkyd resins used in high-quality paints, enamels, and varnishes for the construction and automotive sectors.

Polymer synthesis: Actively used in the production of unsaturated polyester resins, which serve as the basis for creating fiberglass, boat hulls, automotive parts, and pipes.

Chemical industry: Used as an intermediate for the synthesis of various dyes, insecticides, pharmaceuticals, as well as lubricating oil additives.

Key Advantages

High reactivity: Easily enters into esterification and polycondensation reactions, making it a versatile raw material component for numerous processes.

Consistently high quality: Modern production methods ensure a product purity of over 99.8%, guaranteeing stability and predictability of the final materials' properties.

Cost-effectiveness: Phthalic anhydride is one of the most accessible and in-demand types of raw materials for large-scale organic synthesis.

Wide range of applications: The versatility of the component allows its products to be used in almost all fields — from construction and mechanical engineering to medicine.

Storage & Transportation

Store in dry, well-ventilated covered warehouses in tightly closed original packaging, away from strong oxidizers, acids, and alkalis.
Protect from moisture (converts to phthalic acid upon contact with water), direct sunlight, heat sources, and open flames (the material is combustible).
Transportation is possible by all types of covered transport in compliance with the rules for the carriage of dangerous goods (protection against mechanical damage to the container and precipitation).