Phthalic Anhydride; 1, 2-Benzenedicarboxylic Anhydride; CAS No. 85-44-9; C8h4o3; Carbonyl Compounds

• CAS No.: 85-44-9
• Formula: C8h4o3
• EINECS: 201-607-5
• Model NO.: CAS No. 85-44-9
• Classification: High Purity Material
• Grade: GR
• Specific Usage: For Biological Purpose, Pratical Use, For Synthesis
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents
• Source: Dry Powder
• Habit Appellation: Special Reagent
• Application: Industry, Scientific Research
• Property: Organic Reagent
• Color: White
• Hazard Class: 8
• Transport Package: Bag
• Specification: C8H4O3
• Trademark: Chenghexin
• Origin: China
• HS Code: 29173500
• Production Capacity: Over 5000 Tons/Year

Product Description

 

Product Description

Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Phthalic anhydride is an important chemical intermediate in the plastics industry from which are derived numerous phthalate esters that function as plasticizers in synthetic resins. Phthalic anhydride itself is used as a monomer for synthetic resins such as glyptal, the alkyd resins, and the polyester resins. Phthalic anhydride is also used as a precursor of anthraquinone, phthalein, rhodamine, phthalocyanine, fluorescein, and xanthene dyes. Phthalic anhydride is used in the synthesis of primary amines, the agricultural fungicide phaltan, and thalidomide. Other reactions with phthalic anhydride yield phenolphthalein, benzoic acid, phthalylsulfathiazole (an intestinal antimicrobial agent), and orthophthalic acid.

 

 

 

 

Product Parameters

 

 

Phthalic anhydride Chemical Properties

Melting point	131-134 °C(lit.)
Boiling point	284 °C(lit.)
density	1,53 g/cm^3
vapor density	5.1 (vs air)
vapor pressure	<0.01 mm Hg ( 20 °C)
refractive index	1.4500 (estimate)
Fp	152 °C
storage temp.	Store below +30°C.
solubility	6g/l (slow decomposition)
form	Flaky Crystals
pka	2.97[at 20 ºC]
color	White
Odor	Characteristic choking odor
PH Range	2 at 6 g/l at 20 °C
PH	2 (6g/l, H2O, 20ºC)
explosive limit	1.7-10.5%(V)
Water Solubility	6 g/L (20 ºC)
Sensitive	Moisture Sensitive
Merck	14,7372
BRN	118515
Henry's Law Constant	6.29 at 20 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits	NIOSH REL: TWA 6 mg/m^3 (1 ppm), IDLH 60 mg/m^3; OSHA PEL: TWA 12 mg/m^3 (2 ppm); ACGIH TLV: TWA 1 ppm (adopted).
Stability:	Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, moisture, strong acids. Dust may form an explosive mixture with air.
LogP	2.07 at 20ºC
CAS DataBase Reference	85-44-9(CAS DataBase Reference)
NIST Chemistry Reference	Phthalic anhydride(85-44-9)
EPA Substance Registry System	Phthalic anhydride (85-44-9)

FAQ

 

1. Can I get samples?
Yes, free samples are available. 
Samples will usually be sent out within 1-3 working days.

2. Do you accept customized orders?
Yes, both product and package can be customized.
 
3. What is the payment terms?
TT, LC, DP are available.
Please note that OME orders require payment prior to shipment.

4. What is the lead time for mass production?
Delivery time depends on product type and quantity.
Our company has a digital ordering system to ensure scientific and reasonable scheduling of orders, please consult the sales staff you contacted.

5. How to guarantee the product quality?
We have a complete raw material inspection, quality control and pre-factory inspection system to ensure that the order delivered to you is in line with the contract.
In addition, it also supports third-party inspection before shipment. If the inspection fails, the customer's payment will be refunded, and the loss caused by the breach of contract will be compensated.

6. How to check the order status after payment?
After the order is confirmed, the merchandiser will follow up every week and update the order status to you by email.

7. How to deal with after-sales problems?
The after-sales service implements the order responsibility system, and the salesman is the first responsible person for the order. The after-sales service department will set up a service team after receiving the complaint. They will complete the incident investigation and provide you with a resolution within 72 hours.
 

Why Choose Us

 

Over Two Decades of Expertise  Leverage our extensive 22+ years of experience to guide every phase of your order, ensuring a seamless and worry-free process.

Comprehensive Order Supervision   From the moment you reach out to us, every step of your order is meticulously supervised to alleviate any concerns you might have.
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Expert Loading Report Services   An external team meticulously inspects loading operations to ensure everything is in perfect order, backed by a detailed Loading Report for each shipment, with prior samples available upon request.

Unbeatable Pricing   Our profound industry insight, coupled with strong partnerships with select manufacturers, enables us to offer the most competitive prices.

Quality Assured Products   We only approve products that meet the highest international standards and regulations.

Strategic Warehouse Solutions   With our warehouse services, we ensure a stable supply for our clients, buffering against the volatility of material prices.

 

Company Profile

 

Sincere Industries Co., Ltd., established in 2021, is located in the Huarun Mansion, Longhua District, Haikou City, Hainan Province, boasting a brand-new, ultra 5A-level office environment. Based on the profound corporate culture of Shijiazhuang Chenghexin Chemical, which has more than 20 years of experience, the company fully supports the development of import and export-related businesses for its Hainan branch. The company has a harmonious atmosphere, generous benefits, and offers substantial room for growth.

Since its inception, the company has always adhered to the development philosophy of "integrity, stability, innovation, and precision". It continuously explores and innovates, enhancing the R&D and production capabilities of new products. The company's products are constantly optimized and perfected, and it maintains long-term stable cooperation with domestically powerful factories as well as national and provincial scientific research institutes. This ensures that the products' technology is advanced, quality is stable, and prices are competitive, now forming a professional chemical raw material supply enterprise that combines science, industry, and trade with both domestic and international trade.

In recent years, the company has won several national and provincial awards and titles for being a trustworthy enterprise and has been recognized as a quality and efficiency-oriented enterprise. It has also received accolades and recommendations from internet companies like Baidu, and HC; particularly, it has been featured in a special interview and promotion by the CCTV Securities Information Channel's "Brand Power" program.

After more than 20 years of efforts, the company has continued to grow and expand. Its client base includes highly influential local enterprises, listed companies, and Fortune 500 companies, earning long-term trust and support from both new and old customers. With a bright future ahead, all employees are confident in the company's development.