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Maleic anhydride

Maleic anhydride structure

CAS No:
108-31-6
Formula:
C4H2O3
Chemical Name:
Maleic anhydride
Synonyms:
2,5-Furandione;Maleic anhydride;cis-Butenedioic anhydride;Maleic acid anhydride;Toxilic anhydride;Dihydro-2,5-dioxofuran;BM 10;Nourymix MA 901;Crystal Man;Crystal Man AB;NSC 137651;NSC 137652;NSC 137653;NSC 9568;HG 3-993-76;M 188;2,5-Dihydrofuran-2,5-dione;SY-A;WS 8201;GR 216;A 1018;Baolilong A 1018;HA 59;184288-31-1;1190407-73-8;1229972-04-6;1380217-40-2
Categories:
Cosmetic Ingredient > Film Forming

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Description

Colorless needles, white lumps, or pellets with an irritating, choking odor.

Maleic anhydride Basic Attributes

Molecular Weight：

98.05688

Exact Mass：

98.06

BRN：

106909

EC Number：

203-571-6

HScode：

2917140000

Characteristics

PSA：

43.37000

XLogP3：

-0.37

Appearance：

White powder

Density：

1.48 g/cm³

Melting Point：

52.8 °C

Boiling Point：

202.0 °C @ Press: 760 Torr

Flash Point：

218 °F

Refractive Index：

1.515

Water Solubility：

H2O: 79 g/100 mL (25 ºC)

Storage Conditions：

Store at RT.

Vapor Pressure：

0.16 mm Hg ( 20 °C)

Vapor Density：

3.4 (vs air)

Toxicity：

Oral-rat LD50: 708 mg/kg; Oral-Mouse LD50: 2400 mg/kg

Flammability characteristics：

Flammable; spicy and irritating smoke is released from the fire

Explosive limit：

1.4-7.1%(V)

Odor：

Pungent odor

PH：

pH of water solutions: 2.42 at 1X10-2 M; 2.62 at 5X10-3 M; 3.10 at 1X10-4 M

Safety Information

Packing level：

III

Hazard category：

Transport codes：

UN 2215 8/PG 3

wgk germany：

hazard class code：

22-34-42/43

safety instructions：

22-26-36/37/39-45

RTECS Number：

ON3675000

Marks：

Storage features：

The warehouse is ventilated, low temperature and dry; stored separately from oxidants and amines

Explosive characteristics：

Explosive when mixed with air

Stability/Shelf Life：

Stable. Combustible. Incompatible with water, strong oxidizing agents, alkali metals, strong bases, amines, most common metals, polymerization catalysts and accelerators.

Precautionary statement(s)：

P261-P280-P284-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338-P342 + P311

Hazard Statements：

H302-H314-H317-H334-H372-H373

Toxicity

Toxicity class：

moderately toxic

Maleic anhydride Use and Manufacturing

Methods of Manufacturing

The synthesis methods of maleic anhydride mainly include benzene oxidation method, butene oxidation method, butane oxidation method, etc. At present, most of the production uses benzene oxidation method, that is, benzene is used as a raw material to obtain maleic anhydride through catalytic oxidation. A fixed-bed or ebullated-bed reactor is used to oxidize benzene to maleic anhydride with air under the action of a V-Mo-P catalyst. The reaction temperature is 365°C. Then absorb with water to produce maleic acid aqueous solution, and then use xylene for azeotropic distillation and dehydration to obtain maleic anhydride, and finally vacuum distillation to obtain the finished product.

Uses

In Diels-Alder syntheses (as a dienophile), manufacture of alkyd-type of resins, dye intermediates, pharmaceuticals, agricultural chemicals (maleic hydrazide, malathion), in copolymerization reactions.

Computed Properties

Molecular Weight:98.06
XLogP3:-0.1
Hydrogen Bond Acceptor Count:3
Exact Mass:98.000393922
Monoisotopic Mass:98.000393922
Topological Polar Surface Area:43.4
Heavy Atom Count:7
Complexity:129
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Butane

Phenol

Fumaric acid

Cyclohexane

Benzene

o-Xylene

Furfural

Downstream Products

Succinic anhydride

Fumaric acid

Methyl acrylate

Price Analysis

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Data: 2026-07-21
Price: 8125.00Yuan/mt
Change: 0

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