PA Phthalic anhydride cas 85-44-9
115 Inquiries
85-44-9
Industrial Grade
99%
SHANGHAI
25kg/bag
Yes
2026-12-04
Organic Intermediate
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Product Details
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Seller Information
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Inquiry History
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DescriptionPhthalic anhydride, commonly known as phthalic anhydride, is an important organic chemical raw material and a universal anti coking agent for natural rubber, isoprene rubber, butadiene rubber, styrene butadiene rubber, and nitrile rubber. It can prevent burning and improve operational safety. The effect on the vulcanization time and aging performance of the product is minimal. It is particularly effective for rubber compounds containing thiazole guanidine and thiazole thiuram accelerators, as well as those equipped with alkaline accelerators, but not suitable for thiuram sulfur free vulcanization systems. Easy to disperse, does not spray frost, has little pollution, but white adhesive may also have slight discoloration when exposed to light, and is generally not suitable for use with white adhesive. When phthalic anhydride and sodium carbonate are used together for highly promoting sponge products, they can increase the foaming effect. The main use of phthalic anhydride is as an organic intermediate in the production of plasticizers, coatings, and unsaturated polyester resins.ECHEMI Editorial ReferencePhthalic 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.Basic Info
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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:
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)
Hazard IdentificationClassification 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
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
Precautionary statement(s) 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 StoragePrecautions 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.
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Seller Information
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Business Type:
Trader
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Main Products:
Organic Intermediate
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Location:
Room 1001, No. 3 Building, Jiaye International City, Jinrong 3 Street
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Payment Terms:
D/P,L/C,D/A,TT against B/L draft before shipment
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Average lead Time:
14 days
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Total Annual Revenue:
$50 million-$100 million
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Total Employees:
11-50
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Year of Establishment:
2003
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Inquiry History115 Inquiries
Country Product Purchase Quantity Date Posted 
Turkey
PA
1 20' Fcl Nov 4, 2026 
South Africa
phthalic anhydride
20 KG Oct 28, 2026 
India
Phthalic Anhydride Ox Based
340 MT Oct 15, 2026 
Russia
Phthalic Anhydride
20 MT Oct 9, 2026
Turkey
phthalic anhydride
1 20' Fcl Sep 28, 2026
Russia
Phthalic Anhydride
1 20' Fcl Sep 23, 2026 
Egypt
Phthalic anhydride
2.00 20' Fcl Sep 20, 2026 
Colombia
Phtalic Anhydride
1.00 KG Sep 20, 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
Russia
phthalic anhydride
20000 MT Jul 14, 2026 
Qatar
Phthalic Anhydride
100 MT Jun 24, 2026 
Hongkong, China
Phthalic anhydride
25 MT Jun 24, 2026 
Philippines
Phthalic Anhydride
20 MT Jun 20, 2026
India
Phthalic Anhydride
450 MT Jun 5, 2026 
Poland
Phthalic Anhydride flakes
25.00 KG May 29, 2026 Post an enquiry for this product
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