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Phthalic Anhydride

Phthalic Anhydride (PA) is produced from oxidation of O-xylene. At room temperature, it forms white crystal-like flakes. When contacted with water, phthalic acid is produced.

Application

hthalic anhydride (PA) is used for manufacture plasticizers, pigments, dyes and resins. One major consumer of PA is the phthalate plasticiser industry such as DINP, DOP, DBP etc.

PA is used in the manufacture of unsaturated polyester resins (UPR) that are usually blended with glass fibers to produce fiberglass-reinforced plastics. PA-based alkyd resins are used in paints and lacquers that go in to architectural, machinery, furniture, and fixture applications.

Description

  • Name of a product: Phthalic Anhydride (A technical grade).
  • Chemical name (on IUPAC): 1,3-Dihydro-2-benzofuran-1,3-dione.
  • Chemical formula: C8H4O3.
  • CAS-number: 85-44-9

Pthalic Anhydride Technical Specificatin

Item Test Unit Spec. Result Method
Appearance - WHITE FLAKE WHITE FLAKE ASTM D3366
Molten Color (APHA) Flake20, Molten15Max 15 ASTM D3366
Stability Color (APHA) 40 Max 25 ASTM D3366
Purity Wt % 99.85 min 99-87 GC
Solidification Point C 130.99 min 131 ASTM D1493
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