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Maleic anhydride 108-31-6

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CAS No.:

108-31-6

Grade:

Industrial Grade

Content:

99%

Port:

shanghai

Brand:

Orient

Packaging:

25kg/bag,500kg/bag, customized

Price valid (until):

2025-12-26

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Qingdao Orient Chemical Co.,LTD

Company Type:

Trader

Location:

China

Qualification:

Main Products:

pharmaceutical intermediates,peptides,electronic chemicals

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Product Description
Seller Information
Inquiry History

Description

Maleic anhydride Basic information

Product Name:	Maleic anhydride
Synonyms:	TOXILIC ANHYDRIDE;2,5-FURANDIONE;ANHYDRIDE MALEIC;MALIEC ANHYDRIDE;MALEIC ANHYDRIDE, POWDER, 95%;MALEIC ANHYDRIDE 99.5%;MALEIC ANHYDRIDE 98+%;MaleicAnhydride>97%
CAS:	108-31-6
MF:	C4H2O3
MW:	98.06
EINECS:	203-571-6
Product Categories:	Miscellaneous;Organics;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;Building Blocks;Carbonyl Compounds;Carboxylic Acid Anhydrides;Chemical Synthesis;Organic Building Blocks;108-31-6
Mol File:	108-31-6.mol

Maleic anhydride Chemical Properties

Melting point	51-56 °C (lit.)
Boiling point	200 °C (lit.)
bulk density	700-800kg/m3
density	1.48
vapor density	3.4 (vs air)
vapor pressure	0.16 mm Hg ( 20 °C)
refractive index	1.4688 (estimate)
Fp	218 °F
storage temp.	Store below +30°C.
solubility	Chloroform (Slightly), Ethyl Acetate (Slightly)
pka	0[at 20 ℃]
form	powder
color	White
Odor	Mild acrid odor.
PH	0.8 (550g/l, H2O, 20℃)Hydrolysis
explosive limit	1.4-7.1%(V)
Water Solubility	79 g/100 mL (25 ºC)
Sensitive	Moisture Sensitive
Merck	14,5704
BRN	106909
Henry's Law Constant	(atm?m³/mol): Not applicable - reacts with water
Exposure limits	NIOSH REL: TWA 1 ppm (0.25 mg/m³), IDLH 10 ppm; OSHA PEL: TWA 0.25 ppm; ACGIH TLV: TWA 0.25 ppm with an intended change of 0.1 ppm.
Dielectric constant	51.0（60℃）
Stability:	Stable. Combustible. Incompatible with water, strong oxidizing agents, alkali metals, strong bases, amines, most common metals, polymerization catalysts and accelerators.
InChIKey	FPYJFEHAWHCUMM-UHFFFAOYSA-N
LogP	-2.61 at 20℃
CAS DataBase Reference	108-31-6(CAS DataBase Reference)
NIST Chemistry Reference	2,5-Furandione(108-31-6)
EPA Substance Registry System	Maleic anhydride (108-31-6)

Safety Information

Hazard Codes	C
Risk Statements	22-34-42/43
Safety Statements	22-26-36/37/39-45
RIDADR	UN 2215 8/PG 3
OEB	C
OEL	TWA: 1 mg/m3 (0.25 ppm)
WGK Germany	1
RTECS	ON3675000
F	21
Autoignition Temperature	870 °F
TSCA	Yes
HS Code	2917 14 00
HazardClass	8
PackingGroup	III
Hazardous Substances Data	108-31-6(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 1090 mg/kg LD50 dermal Rabbit 2620 mg/kg
IDLA	10 mg/m3

Maleic anhydride Usage And Synthesis

Description	Maleic Anhydride (MAN) is an organic compound with the chemical formula C4H203. It is the acid anhydride of maleic acid and in its pure state it is a colourless or white solid with an acrid odour. Maleic anhydride is truly a remarkable molecule in that it possesses two types of chemical functionality making it uniquely useful in chemical synthesis and applications. Maleic Anhydride is a multifunctional chemical intermediate with applications in several fields of chemical industry. Its major end use is as feedstock in the production of unsaturated polyester resins (UPR). These resins are used both in glass-reinforced and in unreinforced applications. The UPR end uses includes a wide range of applications in construction, marine and automobile industries.
Chemical Properties	Maleic anhydride is colorless needles, white lumps, or pellets. Irritating, choking odor. Dissolves in water to produce maleic acid. Dissolves in ethanol and produces esters.
Physical properties	White, hydroscopic crystals (usually shipped as briquettes). Odor threshold concentration is 0.32 ppm (quoted, Amoore and Hautala, 1983).
Uses	Maleic Anhydride is heterocyclic compound used in the manufacture of unsaturated polyester resins. It has a wide range of other applications; it is used in synthetic tensides, insecticides, herbicides and fungicides.
Uses	Maleic anhydride is used in Diels-Alder syntheses (as a dienophile), manufacture of alkyd-type of resins, dye intermediates, pharmaceuticals, agricultural chemicals (maleic hydrazide, malathion), in copolymerization reactions.
Production Methods	Maleic anhydride was traditionally manufactured by the oxidation of benzene or other aromatic compounds. As of 2006, only a few smaller plants continue to use benzene; due to rising benzene prices, most maleic anhydride plants now use n-butane as a feedstock. In both cases, benzene and butane are fed into a stream of hot air, and the mixture is passed through a catalyst bed at high temperature. The ratio of air to hydrocarbon is controlled to prevent the mixture from catching on fire. Vanadium pentoxide and molybdenum trioxide are the catalysts used for the benzene route, whereas vanadium and phosphorus oxides are used for the butane route. 2 CH₃CH₂CH₂CH₃ + 7 O₂ → 2 C₂H₂(CO)₂O + 8 H₂O.

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—— Q&A ——

Q1:Do you provide sample?

A: Yes, we can provide free sample, you only need pay the shipping cost.

Q2: What is the lead time?

A: For stock goods, it usually take about 5-7 days by air, 15-30 days by sea,For customized products, the delivery time needs to be confirmed based on the actual situation.

Q3: How can I buy? What is the payment method?

A: You can contract us through Email or you can browse our website:orientchem.cc, we have bank transfer,

A：We attach great importance to after-sales service of our products. If there are any quality issues, please contact us within 30 days of receiving the goods and we will handle returns and exchanges for you.

Certificates

Basic Info

Product Name:

Maleic anhydride

Other Name:

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

CAS No.:

108-31-6

UN No.:

2215

Molecular Formula:

C4H2O3

InChIKeys:

InChIKey=FPYJFEHAWHCUMM-UHFFFAOYSA-N

Molecular Weight:

98.05688

Exact Mass:

98.06

BRN:

106909

EC Number:

203-571-6

HScode:

2917140000

Categories:

Bulk Drug Intermediates

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

See More Maleic anhydride Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

Skin corrosion, Sub-category 1B

Serious eye damage, Category 1

Skin sensitization, Sub-category 1A

Respiratory sensitization, Category 1

Specific target organ toxicity â repeated exposure, Category 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H302 Harmful if swallowed H314 Causes severe skin burns and eye damage H317 May cause an allergic skin reaction H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H372 Causes damage to organs through prolonged or repeated exposure
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P260 Do not breathe dust/fume/gas/mist/vapours/spray. 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. P284 [In case of inadequate ventilation] wear respiratory protection.
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P363 Wash contaminated clothing before reuse. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P316 Get emergency medical help immediately. P321 Specific treatment (see ... on this label). P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. 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. P302+P352 IF ON SKIN: Wash with plenty of water/... P333+P317 If skin irritation or rash occurs: Get medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P342+P316 If experiencing respiratory symptoms: Get emergency medical help immediately. P319 Get medical help if you feel unwell.
Storage	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

Dry. Separated from strong oxidants, strong bases and food and feedstuffs.Keep container tightly closed in a dry and well-ventilated place. Moisture sensitive. Storage class (TRGS 510): Non-combustible, corrosive hazardous materials

See More Maleic anhydride Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,peptides,electronic chemicals

Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone

Payment Terms:
100% TT in advance

Average lead Time:
10

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

A reliable supplier is like insurance.

We are mainly specilized in supply of pharmaceutical intermediates, electronic chemicals，food additives, and other fine chemical products.
Integrity is the foundation, quality is life. We would like to work together with you to build a greener and brighter future.

Website: orientchem.cc
Email: scarlett@orientchem.cc
WhatsApp: +86 17753254221

Inquiry History

220 Inquiries

Country	Product	Purchase Quantity	Date Posted
Japan	Inquiry for Maleic Anhydride (Biobased) – CAS No. 108-31-6	1 20' Fcl	Jan 23, 2026
India	Maleic Anhydride 108-31-6	250 MT	Oct 27, 2023
United States	Maleic Anhydride (molten) 99.6% CAS 108-31-6 YUSSEN	6000 MT	Sep 21, 2023
Egypt	maleic anhydride bulk 99% white powder CAS 108-31-6 C4H2O3 maleic anhydride	25 MT	Nov 1, 2023
Colombia	Maleic Anhydride	1 KG	Aug 26, 2025
United States	Maleic anhydride	100 TON	Jun 14, 2024
India	Maleic Anhydride (Molten)	20.00 KG	May 20, 2025
India	Maleic Anhydride (Molten)	200.00 KG	Jun 1, 2025
India	Maleic Anhydride (Molten)	30.00 KG	May 22, 2025
India	Maleic Anhydride (Molten)	10.00 KG	May 17, 2025
Pakistan	Maleic Anhydride	1.00 MT	Jul 30, 2024
India	Maleic Anhydride	20.00 MT	Feb 18, 2024
India	Maleic Anhydride	20.00 MT	Feb 21, 2024
India	Maleic Anhydride	1.00 MT	Feb 26, 2024
United Kingdom	Maleic Anhydride	1.00 MT	Nov 6, 2024
Austria	Maleic Anhydride (Molten)	100.00 KG	Jun 7, 2025
Qatar	Maleic Anhydride	40.00 TON	May 23, 2024
India	Maleic Anhydride	15.00 MT	Jan 31, 2024
Malaysia	MALEIC ANHYDRIDE	300 MT	Jan 29, 2025
Egypt	Maleic Anhydride	10.00 MT	Jul 17, 2026

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