Phthalic Anhydride C8H4O3 Agrochemical Dyestuff Synthesis Intermediate Plasticizer for Agriculture and Industry

Company Description

We specialize in the sale of Phthalic Anhydride C8H4O3, serving industries such as agriculture and chemical manufacturing. Our offerings include high-quality agrochemical intermediates, dyestuff synthesis agents, and plasticizers.

About Phthalic Anhydride

Phthalic anhydride (C₈H₄O₃) is a vital organic compound widely used across multiple industrial sectors. It is a white solid with a distinct sharp odor, commonly produced through the catalytic oxidation of o-xylene or naphthalene. As a versatile intermediate, it serves as a foundational material in producing various chemical products.

Grades and Characteristics

Phthalic anhydride is typically available in multiple grades based on purity and intended application:

• Technical Grade: Used predominantly in plasticizers, resins, and other industrial uses.
• Food Grade: Utilized in select food packaging or indirectly in food applications (subject to regulations).
• Industrial Grade: Suited for agrochemical and dye intermediate applications.

Typical physical and chemical properties include:

• Appearance: White crystalline powder or flakes
• Molecular Weight: 148.12 g/mol
• Melting Point: Approximately 131–133 °C
• Solubility: Slightly soluble in water; soluble in organic solvents
• Purity: Usually 99% and above for industrial use

Applications in Agriculture and Industry

Phthalic anhydride functions as a crucial intermediate for the synthesis of various agrochemical products and industrial compounds. Its primary applications include:

• Agrochemicals: Production of herbicides, insecticides, and fungicides where it acts as a precursor molecule in synthesis routes.
• Dyestuff Synthesis: Used to manufacture azo dyes and pigments — essential in textile, plastic, and paint industries.
• Plasticizers: Fundamental for producing phthalate plasticizers such as dioctyl phthalate (DOP), which enhance flexibility and durability of plastics, especially PVC.
• Polyester and Alkyd Resins: Phthalic anhydride is a key raw material in creating resins used in coatings, adhesives, and varnishes.

Production Process

The manufacturing of phthalic anhydride primarily involves the catalytic vapor phase oxidation of o-xylene or naphthalene in the presence of a vanadium pentoxide catalyst. This process yields a high-quality product with a controlled degree of purity and minimal impurities, essential for downstream applications.

Quality and Grading Standards

Quality control is critical in phthalic anhydride production to meet industry standards and customer specifications:

• Purity levels typically range from 99% to 99.9% depending on application requirements.
• Moisture content is tightly controlled to prevent hydrolysis to phthalic acid.
• Color and odor specifications ensure consistency and suitability for chemical synthesis.
• Compliance with chemical safety and transport regulations is standard.

Packaging and Trade

Phthalic anhydride is commonly packaged in the following formats to facilitate safe transportation and storage:

• Industrial-grade products often come in 25 kg, 50 kg, or 1000 kg bags or cartons made of multi-layered paper or plastic for moisture protection.
• Bulk shipments are carried in tankers or containerized in sealed drums to minimize contamination.
• Export shipments comply with the international transport regulations for hazardous chemicals, including proper labeling and documentation.