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Phthalic Anhydride Industrial Grade White Powder CAS 85-44-9 for Plasticizer Unsaturated Polyester Resin

Name: Phthalic Anhydride Industrial Grade White Powder CAS 85-44-9 for Plasticizer Unsaturated Polyester Resin
Brand: CAS 85-44-9 White Powder Phthalic Anhydride
SKU: pr2610101005
Price: 2300 USD
Availability: InStock

TDS 120 Inquiries

Unit Price:

$2300-2700/MT FOB

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CAS No.:

85-44-9

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

CAS 85-44-9 White Powder Phthalic Anhydride

Packaging:

25kg/bag

Price valid (until):

2026-11-10

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Ou Sheng International Trading Limited

Company Type:

Trader

Location:

Hongkong, China

Payment Terms:

100% TT in advance

Average Lead Time:

15 days

Qualification:

Main Products:

nitric acid,sles,xylene,aniline

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Product Description
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Inquiry History

Description

CAS 85-44-9 White Powder Phthalic Anhydride

Product Description

Phthalic anhydride is an organic compound with molecular formula c8h4o3. It is a cyclic anhydride
formed by intramolecular dehydration of phthalic acid. Phthalic anhydride is a white solid. It is an
important raw material in chemical industry, especially in the manufacture of plasticizer. Hydrolysis,
alcoholysis and ammonolysis can occur, and anthraquinone derivatives can be synthesized by
reacting with aromatic hydrocarbons. Phthalic anhydride is industrially prepared by vapor phase
oxidation of naphthalene and air at 350 ~ 360 ºC under the catalysis of vanadium pentoxide.
It can also be prepared by air oxidation of o-xylene.

Item	Standard
Product Name	O-Phthalic Anhydride,Phthalic Anhydride,PA
Purity	≥99.5%
CAS NO	85-44-9
EINECS No.	201-607-5
Appearance	White scale or crystalline powder
Melting chromaticity number	≤20
Crystallization point ºC	≥130.8
Thermal stability color number	≤50
Free acid%	≤0.20
Molecular Formula	C8H4O3
Application	Plasticizer Manufacturing Raw Material.Curing agent for epoxy resin etc.

Phthalic anhydride uses

1.Phthalic anhydride is one of the most important organic chemical raw materials, and its main
derivatives are dibutyl phthalate; Dioctyl ester and diisobutyl ester are used as plasticizers for
PVC, etc; It can also be used to produce unsaturated polyester resin; Alkyd resin; Dyes and
pigments; Various paints; Food additives; Phenolphthalein, a laxative in medicine; Imiphos in
pesticides; Clomazone and saccharin sodium, etc.
2.Phthalic anhydride is used as curing agent of epoxy resin.

Factory supply Purity 99.5% Phthalic Anhydride CAS 85-44-9

ITEM	INDEX
ITEM	Top grade	Result
Appearance	white scaly or crystalline powder
Molten Chroma(Chroma no. )≤	20	15
thermostable Chroma(Chroma no. )≤	50	11
Chroma of vitriol(Chroma no. )≤	60	10
crystallization point°C≥	130.5	130.3
Purity(mass fraction)%≥	99.8	99.9
Free acid(mass fraction)≤ %	0.2	0.01

Application

One of the important organic chemical raw materials. It can be used as an intermediate of organic compounds such as plasticizer, alkyd resin, unsaturated polyester resin, dyes and pigments, medicine, food additives and pesticides.

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Items	Specifications

ECHEMI Editorial Reference

Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. In 2000, the worldwide production volume was estimated to be about 3 million tonnes per year.

Certificates

Basic Info

Product Name:

Phthalic anhydride

Other Name:

1,3-Isobenzofurandione;Phthalic anhydride;ESEN;Phthalandione;1,3-Phthalandione;Phthalic acid anhydride;Retarder AK;Retarder ESEN;Retarder PD;1,2-Benzenedicarboxylic anhydride;Vulkalent B/C;TGL 6525;Araldite HT 901;HT 901;Phthalanhydride;Sconoc 7;Retarder B-C;NSC 10431;Sconoc 5;2-Benzofuran-1,3-dione;Rikacid PA;OP 392;ADP 1200;1,3-Dihydro-2-benzofuran-1,3-dione;39363-63-8

CAS No.:

85-44-9

Molecular Formula:

C8H4O3

InChIKeys:

InChIKey=LGRFSURHDFAFJT-UHFFFAOYSA-N

Molecular Weight:

148.116

Exact Mass:

148.016

HScode:

2917350000

Categories:

Carboxylic Acids and Derivatives

Characteristics

PSA:

43.37

XLogP3:

0.9972

Appearance:

white crystalline solid with choking odour

Density:

1.53

Melting Point:

129-132ºC

Boiling Point:

284ºC

Flash Point:

152ºC

Refractive Index:

1.646

Water Solubility:

6 g/L (20 ºC)

Storage Conditions:

Store at RT.

Vapor Pressure:

<0.01 mm Hg ( 20 °C)

Vapor Density:

5.1 (vs air)

See More Phthalic anhydride Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

Skin irritation, Category 2

Serious eye damage, Category 1

Skin sensitization, Category 1

Specific target organ toxicity â single exposure, Category 3

Respiratory sensitization, Category 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H302 Harmful if swallowed H315 Causes skin irritation H318 Causes serious eye damage H317 May cause an allergic skin reaction H335 May cause respiratory irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P271 Use only outdoors or in a well-ventilated area. P284 [In case of inadequate ventilation] wear respiratory protection.
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P321 Specific treatment (see ... on this label). P332+P317 If skin irritation occurs: Get medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P317 Get medical help. P333+P317 If skin irritation or rash occurs: Get medical help. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P319 Get medical help if you feel unwell. P342+P316 If experiencing respiratory symptoms: Get emergency medical help immediately.
Storage	P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from combustible substances, reducing agents, strong oxidants, strong bases, strong acids and food and feedstuffs. See Chemical Dangers. Ventilation along the floor. Dry. Well closed.Chemical stability: Stable under recommended storage conditions.

See More Phthalic anhydride Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
nitric acid,sles,xylene,aniline

Location:
UNIT 903, 9/F., CAMERON COMM CENTRE, 458-468 HENNESSY ROAD, CAUSEWAY BAY HONG KONG

Payment Terms:
100% TT in advance

Average lead Time:
15 days

Total Annual Revenue:
$5 million-$10 million

Total Employees:
51-100

Year of Establishment:
2026

We are a professional exporter of industrial chemical solvents and mining‑use chemicals.

We supply a wide range of industrial solvents for coating, printing, cleaning and manufacturing industries. Our mining‑chemical products include flotation collectors, frothers, flocculants and other reagents for mineral processing and mine wastewater treatment.

With rich experience in chemical export, we provide stable‑quality goods, customized packaging and complete export solutions. We sincerely welcome global customers for inquiries and long‑term cooperation.

Inquiry History

120 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Factory Supply Phthalic Anhydride/PA 99.9% CAS: 85-44-9	25 MT	Oct 27, 2023
India	Phthalic Anhydride	26 MT	Aug 29, 2024
Germany	Phthalic Anhydride	230 TON	Jul 22, 2024
Ireland	Phthalic Anhydride	20 TON	Apr 25, 2025
India	Phthalic Anhydride	20.00 MT	Feb 18, 2024
Qatar	Phthalic Anhydride	60.00 TON	May 23, 2024
Russia	Phthalic Anhydride	20 MT	Oct 9, 2026
Turkey	phthalic anhydride	1 20' Fcl	Sep 28, 2026
Pakistan	Phthalic Anhydride	40 MT	Sep 5, 2026
Egypt	phthalic anhydride	1 G	Sep 3, 2026
Pakistan	Phthalic Anhydride (both ox & np based)	8.00 20' Fcl	Sep 2, 2026
Germany	Phthalic Anhydride	25 MT	Aug 19, 2026
Russia	phtalic anhydride	800 KG	Aug 19, 2026
India	Phthalic Anhydride	34 MT	Jul 14, 2026
Qatar	Phthalic Anhydride	100 MT	Jun 24, 2026
Hongkong, China	Phthalic anhydride	25 MT	Jun 24, 2026
India	Phthalic Anhydride	600 MT	Dec 17, 2025
Saudi Arabia	Phthalic Anhydride	1.00 KG	Nov 4, 2025
South Korea	Phthalic anhydride	1 40' Fcl	Apr 30, 2025
United States	Phthalic Anhydride	100 MT	Apr 14, 2025

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Phthalic Anhydride Industrial Grade White Powder CAS 85-44-9 for Plasticizer Unsaturated Polyester Resin

Product Description

Seller Information

Inquiry History

CAS 85-44-9 White Powder Phthalic Anhydride

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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Phthalic anhydride Market Price

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