Product Information
Phthalic anhydride (PA), CAS No. 85-44-9, is a white crystalline powder or flake-like solid with the molecular formula C₈H₄O₃. It is an important aromatic acid anhydride compound, characterized by easy sublimation, a pungent odor, and high chemical reactivity. It is readily soluble in organic solvents and slightly soluble in cold water. It is widely used in the chemical, plastics, coatings, and pharmaceutical industries, and is a key industrial intermediate.
Properties
| Molecular Formula | C8H4O3 |
| Molecular Weight | 148.116 |
| CAS Number | 85-44-9 |
| EINECS | 201-607-5 |
| Appearance | white needle shaped crystals or flake shaped crystals |
| Purity | 99.5%min |
| Grade | OX (O-xylene process), NAP (Naphthalene process) |
| Melting Point | 131.2℃ |
| Boiling Point | 295℃ |
| Density | 1.53 |
| Synonym | o-Phthalic Anhydride, Phthalic Anhydride, 1,3-Isobenzofurandione |
It is a white flaky crystalline solid with a pungent, irritating odor. It is slightly soluble in water and soluble in ethanol, ether, and other organic solvents. It hydrolyzes to phthalic acid in hot water. It features stable chemical properties, high purity, good reactivity, and excellent compatibility with various chemical raw materials. It is a fundamental and important organic chemical intermediate with a mature production process and stable supply quality.
COA
Phthalic Anhydride, Ortho-Xylene Base
|
Item |
Standard |
Result |
|
Appearance |
white needle shaped crystals or flake-shaped crystals |
white needle shaped crystals |
|
Fused chroma(chroma No.) |
≤20 |
10 |
|
Chroma of thermal stability(chroma No.) |
≤50 |
30 |
|
Chroma of sulphuric acid |
≤40 |
30 |
|
Free acid (Mass fraction)% |
≤0.2 |
0.025 |
|
Purity % |
≥99.5% |
99. 96% |
Phthalic Anhydride, Naphthalene Base
|
Appearance |
Standard |
White flake powder |
||||
|
Testing results |
White flake powder |
|||||
|
Standard |
Content (%) |
Solidification Point(℃) |
Thermally stable chroma (%) |
Molten Color |
Sulphuric acid color |
Free acid (%) |
|
≥99.50% |
≥130.50℃ |
≤50 |
≤20 |
≤40 |
≤0.2% |
|
|
Result |
99.85 |
131.5 |
30 |
10 |
25 |
0.02 |
Uses and Applications
Plasticizer Manufacturing
1. This is the main application of phthalic anhydride. It is used to produce phthalic anhydride-based plasticizers such as dioctyl phthalate (DOP) and dibutyl phthalate (DBP). These plasticizers are widely used in the plastics industry, including in wire and cable, plastic films, flooring, wallpaper, hoses, shoe soles, and toys. For example, in the production of PVC plastic film, such as agricultural greenhouse film, plasticizers made from the compound significantly improve the film's flexibility and durability, extending its outdoor service life and enhancing its resistance to harsh natural conditions such as wind, sunlight, and rain.
2. It is also an essential raw material for the manufacture of PVC artificial leather. Plasticizers derived from phthalic anhydride give PVC artificial leather excellent softness and elasticity, making its appearance and texture similar to natural leather. This material is widely used in bags, sofa upholstery, and related products.
Coating Production
1. It is a key raw material for alkyd resin coatings. In the production of alkyd resin coatings for building exteriors, phthalic anhydride participates in the resin synthesis process, imparting high gloss to the coating and resulting in a bright and aesthetically pleasing wall finish after application.
2. In the manufacture of automotive refinish paints, phthalic anhydride helps improve coating hardness and adhesion. Coatings containing these materials adhere firmly to the vehicle's surface and form a hard film that protects the vehicle from scratches and corrosion.
Pharmaceutical and Dye Industries
It is used as an intermediate in drug synthesis for the preparation of various pharmaceuticals, including antibiotics and antiepileptic drugs. It is also used in the pesticide industry to produce herbicides and fungicides.
Furthermore, it can be used to synthesize anthraquinones and their derivatives, such as 1,4-dihydroxyanthraquinone and 2-chloroanthraquinone, thereby enabling the production of anthraquinone vat dyes and disperse dyes for various dyes and pigments to meet the needs of the textile and printing industries.
Other Applications
It is used as an additive in the production of food packaging materials, subject to strict compliance with relevant national standards, as well as a laboratory chemical reagent and in the synthesis of surfactants, flavorings, and other products.
Why Choose Sinoright for your Phthalic Anhydride supplier?
1. Rigorous Quality Assurance
We implement strict controls and inspections for every batch of the product. From the initial provision of samples for testing to the signing of bulk procurement orders, we ensure that samples from every outgoing batch are tested before shipment. We guarantee that the quality of the delivered product is consistent with the approved samples, ensuring that the products you purchase are fully quality assured. We can provide all necessary product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS) and REACH Certification, at any time, ensuring full compliance with various international standards.
2. Stable and Competitive Supply Chain
Benefiting from our large-scale production capabilities and robust supply chain system, we maintain ample inventory of phthalic anhydride, covering both the ortho-xylene and naphthalene-based methods, and have established a highly responsive supply chain network. This enables us to monitor market price fluctuations for this product and its upstream and downstream products in real time. While ensuring uninterrupted product supply, we can formulate the most cost-effective procurement strategies for you, helping optimize your purchasing decisions amid changing market conditions.
3. One-Stop Procurement Solutions Provider
We offer flexible payment terms, including T/T, L/C, D/P, D/A, O/A, and Alipay. As a one-stop solutions provider, we offer professional services covering every stage of the process - from solution recommendations, logistics booking, and hazardous materials declarations, multi-product FCL consolidation to door-to-door transportation and customs clearance assistance at the destination port - resolving any issues that may arise along the way.
4. Professional Customer Service and 24-Hour Response Mechanism
We have assembled a dedicated team of technical experts, sales professionals, and customer service specialists to provide 24/7 support. We offer expert guidance on the transportation, handling, and storage of phthalic anhydride, as well as assistance with any technical issues encountered during production and application. Furthermore, if you would like to stay informed about the latest developments and industry analyses in China's phthalic anhydride market and the fine chemical sector, you are welcome to consult our senior sales colleagues at any time to obtain authoritative market analysis reports and industry insights. Let us serve as your dedicated R&D and procurement department in China.
Packaging, Logistics & Compliance Capabilities
|
·Packaging Packaging: 25kg/bag, 500kg/bag 20ft Container: 25kg/bag: 20MT per full container 500kg/bag: 15MT per full container 40ft Container: 28MT per full container |
·Transportation Modes Sea freight (FCL / LCL) Road and rail transportation Incoterms: EXW, FOB, CFR, CIF, DAP, DDP |
|
·Storage & Handling Store in a cool, dry, and well-ventilated warehouse. |
·Documentation & Compliance Technical Data Sheet (TDS) Safety Data Sheet (SDS/MSDS) Certificate of Analysis (COA) REACH Certification Certification for Safe Transport of Chemical Goods Transport Hazard Classification Report |
Frequently Asked Questions (FAQs)
Q: What is phthalic anhydride (PA) made from?
A: Phthalic anhydride is produced mainly through two process routes: the o-xylene oxidation method and the naphthalene oxidation method.
The feedstock for PA produced via the o-xylene method is o-xylene. Industrial production typically involves the gas-phase oxidation of o-xylene using a vanadium-based catalyst system, primarily composed of vanadium pentoxide.
The feedstock for PA produced via the naphthalene method is liquid naphthalene. The catalysts used in this process are also vanadium-based, and under rigorous reaction conditions, naphthalene is oxidized to produce phthalic anhydride.
Q: What is phthalic anhydride used for?
A: Phthalic anhydride is one of the most important organic chemical raw materials. Its primary derivatives, including dibutyl phthalate, dioctyl phthalate (DOP), and diisobutyl phthalate, are widely used as plasticizers for materials such as PVC. It is also used in the production of unsaturated polyester resins, alkyd resins, dyes and pigments, and various paints. In addition, it serves as a precursor for synthesizing key intermediates, such as anthraquinone, 2-chloroanthraquinone, and 1,4-dihydroxyanthraquinone, as well as dyes such as Phthalocyanine Blue BS, BX, and B. Other applications include food additives, the laxative phenolphthalein (in pharmaceuticals), and agricultural chemicals such as phosmet, bentazon, and sodium saccharin.
Q: Is phthalic anhydride dangerous?
A: Yes, phthalic anhydride is an irritant to the eyes, nose, throat, and skin. It is also combustible and corrosive. When handling it, operators should undergo specialized training in accordance with the product's accompanying Material Safety Data Sheet (MSDS). Strict adherence to operating procedures and the use of personal protective equipment are mandatory, including self-priming filtering dust masks, safety goggles, acid- and alkali-resistant plastic workwear, and acid- and alkali-resistant rubber gloves.
Q: Should I choose phthalic anhydride produced via the o-xylene method or the naphthalene method?
A: Simply put, phthalic anhydride produced via the o-xylene method offers greater quality stability and is more environmentally friendly, whereas the naphthalene-based product has lower production costs and more flexible pricing. We invite you to contact our technical team and sales department. Based on your specific circumstances and requirements, we will recommend the most suitable procurement solution for you.
Q: Is Phthalic Anhydride available in bulk quantities?
A: Yes, the phthalic anhydride we supply is primarily available in two packaging specifications: 25 kg bags and 500 kg bags. If you have specific requirements, please contact us to discuss customized solutions.
Q: Do you provide support for Phthalic Anhydride applications?
A: Yes, our technical team and business department are available 24/7 to address any issues you may encounter throughout the entire process - from the latest pricing, procurement strategies, and shipping logistics to storage precautions and product usage. For instance, a client was torn over which product brand to select, so we based the most suitable solution for him on our market analysis and years of experience.
Hot Tags: phthalic anhydride/pa cas:85-44-9, China phthalic anhydride/pa cas:85-44-9 manufacturers, suppliers, factory, polyacrylic acid formula, styrene, dodecyl acrylate, sodium percarbonate bulk, application of acrylic acid, price acrylic acid
