Phthalic Anhydride
CAS 85-44-9
Plasticiser (DOP/DINP) · Alkyd Resin · Unsaturated Polyester
- Phthalic anhydride content, %
- min 99,9
- Crystallisation temperature, °C
- min 130,9
- Phthalic acid content
- Not present
- Maleic anhydride content, %
- max 0,05
Technical Specifications
| Parameter | Value | Method / unit |
|---|---|---|
| Appearance | White-coloured flakes, powder or molten liquid | Visual |
| Phthalic anhydride content, % | min 99,9 | ASTM E 1899 · % |
| Crystallisation temperature, °C | min 130,9 | ASTM D 938 · °C |
| Phthalic acid content | Not present | — |
| Maleic anhydride content, % | max 0,05 | ASTM E 1899 · % |
| Iron content, % | max 0,0002 | ASTM D 4040 · % |
| Ash content, % | max 0,002 | ASTM D 482 · % |
| Colour (Hazen) - at shipment, Hazen | max 15 | ASTM D 1209 |
| Colour (Hazen) - over shelf life, Hazen | max 20 | ASTM D 1209 |
| Colour after heating (250°C / 90 min), Hazen | max 40 | ASTM D 1209 · °C |
Detailed application areas
Plasticiser production (DOP, DINP, etc.). Alkyd resin production. Paint and coating systems. Unsaturated polyester resins. Pigment and dye chemicals. Rubber chemicals. Insulation materials. Chemical intermediate manufacture. Fibreglass resin systems.
Use Cases
- Plasticiser (DOP/DINP)
- Alkyd Resin
- Unsaturated Polyester
- Paint and Coating
- Pigment Production
- Rubber Chemicals
Packaging & storage
Packaging
PP Bag: 25 kg. Big Bag: 500-1000 kg. Molten Bulk Tank: 20-24 MT. ISO Tank: 20-24 MT.
Storage
Shall be stored in cool, dry and well-ventilated areas. Contact with moisture must be avoided. Crystallisation may occur at low temperatures. Keep away from oxidisers.
Shelf Life
12 months
Documents
Technical data sheet (TDS)
Review the recorded specifications, packaging and storage information.
View technical data sheet ↗Safety & lot documents
Request the current SDS and the certificate of analysis (CoA) for the lot you are evaluating.
Regulatory and compliance
KORKİMYA supply assurance
Stock in Türkiye
Current availability is confirmed by product and lot with your quote.
KKDİK registered
Every catalog product is KKDİK registered for Türkiye.
CoA for every lot
Verify technical values against the lot's certificate of analysis.
TL invoicing
Turkish lira invoicing is available for domestic purchases.
Payment terms
Discuss terms for your quantity and supply plan when requesting a quote.
Request Sample
Product Information
Phthalic Anhydride (C8H4O3) is an industrial product in the anhydrides category, used in Plasticiser (DOP/DINP), Alkyd Resin. Typical specifications: Appearance: White-coloured flakes, powder or molten liquid; Phthalic anhydride content, % 99,9; Crystallisation temperature, °C 130,9. KORKİMYA supplies Phthalic Anhydride in PP Bag: 25 kg. Big Bag: 500-1000 kg. Molten Bulk Tank: 20-24 MT. ISO Tank: 20-24 MT.. Shelf life: 12 months.
Plasticiser production (DOP, DINP, etc.). Alkyd resin production. Paint and coating systems. Unsaturated polyester resins. Pigment and dye chemicals. Rubber chemicals. Insulation materials. Chemical intermediate manufacture. Fibreglass resin systems.
- Formula
- C8H4O3
- CAS
- 85-44-9
- Category
- ANHYDRIDES
Synonyms
Test Methods
Visual · ASTM E 1899 · ASTM D 938 · ASTM D 4040 · ASTM D 482 · ASTM D 1209
Frequently asked questions
What is phthalic anhydride (PA) and what is it used for?
Phthalic anhydride (CAS 85-44-9, C₈H₄O₃) is a chemical intermediate supplied as white flakes, powder or molten liquid. It is mainly used to produce phthalate plasticisers such as DOP and DINP, alkyd resins, unsaturated polyester resins, paint and coating systems, and pigment and rubber chemicals.
What packaging is available and is it supplied from stock?
Phthalic anhydride is offered in 25 kg PP bags, 500-1000 kg big bags, 20-24 MT molten bulk tanks and 20-24 MT ISO tanks. KORKİMYA holds local stock as an alternative to Chinese imports and delivers from stock; a sample and invoicing in TRY are available before shipment.
Is the product KKDİK-registered and is a safety data sheet provided?
Yes. The phthalic anhydride supplied by KORKİMYA is registered under KKDİK, and a Turkish safety data sheet (SDS) plus a certificate of analysis (CoA) are provided on request. It is stored cool, dry and well-ventilated, away from moisture and oxidisers; shelf life is 12 months.
What are the purity specs and how do I get a sample or quote?
Phthalic anhydride content is min 99.9%, crystallisation temperature min 130.9°C, maleic anhydride max 0.05%, iron max 0.0002% and colour (Hazen) max 15. Contact KORKİMYA for a sample, current price quote and to purchase; delivery is from stock with TRY invoicing.
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Last updated: 04/10/2026
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