Plasticizers
Used as a key raw material in the production of phthalate plasticizers for flexible PVC and related applications.
Others
Phthalic Anhydride (PA)
Buy Phthalic Anhydride in Bags & Bulk – Chemical Intermediate for Plasticizers, Resins and Coatings
Rotterdam Chemicals Group supplies high-quality Phthalic Anhydride for use in plasticizers, alkyd resins, unsaturated polyester resins, coatings, dyes and specialty chemical manufacturing.
Phthalic Anhydride can be supplied internationally in bags, big bags and bulk quantities, depending on the required grade, specification, packaging and destination. Product, safety and transport documentation is available with each shipment.
What is Phthalic Anhydride?
Phthalic Anhydride, commonly known as PA, is a white crystalline solid or flakes with a characteristic odour. It is an important aromatic chemical intermediate produced from ortho-xylene or naphthalene.
PA is identified by CAS number 85-44-9 and EC number 201-607-5. It is widely used in the production of plasticizers, alkyd resins, polyester resins, pigments, dyes and other industrial chemicals.
Because Phthalic Anhydride can cause irritation and sensitisation, it must be handled according to the applicable Safety Data Sheet.
Applications Across Industries
Alkyd Resins
Used in alkyd resin production for paints, coatings, varnishes and industrial finishes.
Dyes & Pigments
Used as an intermediate in the production of dyes, pigments and colourants.
Chemical Manufacturing
Used as a building block for esters, specialty chemicals and other downstream derivatives.
Unsaturated Polyester Resins
Used in polyester resin systems for composites, construction materials and reinforced plastics.
Coatings & Paints
Used in resin systems for protective coatings, decorative paints and specialty finishes.
Grades and Packaging Options
Available Packaging*
25 kg bags
Big bags
Palletised supply
Bulk quantities available upon request
Custom packaging solutions available upon request
*All formats available directly from our Rotterdam warehouse with international supply support.
Available Grades
Industrial Grade – Suitable for plasticizers, resins, coatings and general chemical manufacturing.
Specifications and Technical Details
Property
Value
Product name
|
Phthalic Anhydride |
Abbreviation
|
PA |
CAS number
|
85-44-9 |
EC number
|
201-607-5 |
Molecular formula
|
C₈H₄O₃ |
|
Odour |
|
Characteristic sharp odour |
|
Appearance |
|
White flakes, crystals or solid |
|
Purity |
|
Typically ≥ 99.5%, depending on grade |
|
Melting point |
|
Approximately 131°C |
|
Boiling point |
|
Approximately 284°C |
|
Solubility |
|
Reacts slowly with water to form phthalic acid |
|
Chemical character |
|
Aromatic acid anhydride |
Compliance and Documentation
REACH Registered (where applicable)
✓ Industrial-grade documentation available depending on grade
Supplied with SDS, TDS and Certificate of Analysis
Logistics and Global Supply
We supply Phthalic Anhydride internationally in bags, big bags and larger commercial quantities.
Phthalic Anhydride should be stored in tightly closed packaging in a cool, dry and well-ventilated area. The product should be protected from moisture, because it can react with water to form phthalic acid.
Our logistics team supports customers with product documentation, export paperwork, customs coordination and suitable international transport arrangements.
Frequently Asked Questions (FAQ)
What is Phthalic Anhydride used for?
Phthalic Anhydride is used mainly in the production of plasticizers, alkyd resins, unsaturated polyester resins, coatings, dyes, pigments and specialty chemicals.
Is Phthalic Anhydride the same as Phthalic Acid?
No. Phthalic Anhydride is the anhydride form. When it reacts with water, it can form phthalic acid.
Is Phthalic Anhydride a monomer?
It is not usually classified as a monomer like acrylates or methacrylates. It is mainly used as a chemical intermediate and resin raw material.
Is Phthalic Anhydride soluble in water?
Phthalic Anhydride reacts slowly with water to form phthalic acid. It should therefore be protected from moisture during storage.
Is Phthalic Anhydride available in different forms?
Yes. It is commonly available as flakes, crystals or molten material, depending on the producer, quantity and logistics setup.
Request a Quote or More Information
Looking to secure your supply of Phthalic Anhydride?
Contact our team for availability, packaging options and compliance support. We deliver globally from Rotterdam with tailored solutions.
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