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Phthalic Anhydride (PA) bulk supplier – essential feedstock for phthalate plasticizers, unsaturated polyester resins, alkyd resins & dye intermediates.Phthalic Anhydride (PA) bulk supplier – essential feedstock for phthalate plasticizers, unsaturated polyester resins, alkyd resins & dye intermediates.
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Phthalic Anhydride

CAS Number:

85-44-9

Other Trading Names:

  • 2-Benzofuran-1,3-Dione
  • Isobenzofuran-1,3-Dione
  • Phthalic Anhydride

Types of Packaging

  • 25 kg bag with inner plastic bag.
  • 50 kg bag with inner plastic bag.
  • 1000 kg bag with inner plastic bag.
  • 1200 kg bag with inner plastic bag.

HS Code:

29173500

Categories: ,
Item Value
Melting Point 131-134 °C
Boiling Point 284 °C
Density 153g/cm3
Vapour Density 5.1 (vs air)
Vapour Pressure <0.01mm Hg (20 °C)
Flash Point 152 °C
Water Solubility 6 g/L (20 OC)

High-Purity Phthalic Anhydride (PA) – Essential Chemical Intermediate for Plasticizers, Resins & Dyes

We are a leading global supplier of Phthalic Anhydride (PA), a key industrial organic compound and fundamental building block for the production of plasticizers, unsaturated polyester resins, alkyd resins, and dye intermediates. Supplied in high-purity flake or molten form, our PA meets stringent quality standards for large-scale chemical manufacturing.

KEY APPLICATIONS FOR BULK BUYERS:

  • Plasticizer Production: Primary feedstock for manufacturing phthalate plasticizers such as DOP, DINP, and DIDP, used to impart flexibility to PVC products including cables, flooring, films, and synthetic leather.

  • Unsaturated Polyester Resins (UPR): Critical raw material in the production of fiberglass-reinforced plastics (FRP) for marine, automotive, construction, and sanitaryware applications.

  • Alkyd Resins: Used in the synthesis of alkyd resins for industrial and decorative paints, coatings, and varnishes, providing durability and gloss.

  • Dye & Pigment Intermediates: Intermediate in the production of anthraquinone dyes, phthalein dyes, and pigments for textiles, inks, and plastics.

  • Pharmaceutical Intermediates: Used in the synthesis of certain pharmaceutical compounds and active ingredients.

  • Flame Retardants: Component in the manufacture of halogen-free flame retardants for polymers and engineering plastics.

WHOLESALE SUPPLIER ADVANTAGES:

  • High Purity & Consistent Form: Available as white crystalline flakes or in molten state (>99.8% purity) with low maleic anhydride and benzoic acid content.

  • Bulk Supply Options: Supplied in 25 kg bags (flakes), isotanks (molten), and bulk hopper trucks for industrial-scale consumption.

  • Competitive Bulk Pricing: Cost-effective sourcing for plasticizer manufacturers, resin producers, chemical processors, and distributors with volume discounts.

  • Global Logistics & Handling Support: Expertise in transporting both solid and molten PA, supported by full SDS, COA, and regulatory documentation.

  • Technical & Application Expertise: In-depth support for plasticizer synthesis, resin formulation, and process optimization.

  • Multi-Industry Supply Chain Reliability: Trusted supplier to the plastics, coatings, construction, automotive, and chemical industries.

PRODUCT SPECIFICATIONS:

  • Chemical Name: Phthalic Anhydride (PA)

  • CAS Number: 85-44-9

  • Appearance: White crystalline flakes or needles (solid); clear molten liquid when heated

  • Purity: ≥ 99.8%

  • Melting Point: ~131°C

  • Solidification Point: ≥ 130.5°C

  • Free Acid (as Phthalic Acid): ≤ 0.1%

  • Storage (Flakes): Store in a cool, dry, well-ventilated area away from moisture, bases, and oxidizing agents.

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