Maleic acid

Also known as: (2Z)-2-Butenedioic acid, cis-Butenedioic acid, Toxilic acid, cis-Ethylene-1,2-dicarboxylic acid, Maleinic acid, Kyselina maleinova

Maleic acid (CAS 110-16-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H4O4 and a molecular weight of 116.072 g/mol. Key properties include a melting point of 134-138ºC, a boiling point of 355.5±25.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 183.0±19.7 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 110-16-7
Jingsj CID: J-21476-0
Molecular Formula: C₄H₄O₄
Molecular Weight: 116.072 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	134-138ºC
Boiling Point	355.5±25.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	183.0±19.7 °C
Exact Mass	116.010956
PSA	74.60000
LogP	-0.01
Vapor Pressure	0.0±1.7 mmHg at 25°C
Refractive Index	1.526
Additional Property	790 g/L (25 ºC)

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger

H302 — Harmful if swallowed
H312 — Harmful in contact with skin
H315 — Causes skin irritation
H317 — May cause an allergic skin reaction
H318 — Causes serious eye damage
H335 — May cause respiratory irritation

Activity & Biological Data

Target	Human Endogenous Metabolite GAD
Additional Information	[1]. Fonda ML, et al. Glutamate decarboxylase. Substrate specificity and inhibition by carboxylic acids. Biochemistry. 1972 Mar 28;11(7):1304-9. [2]. Paudyal R, et al. A novel approach in acidic disinfection through inhibition of acid resistance mechanisms; Maleic acid-mediated inhibition of glutamate decarboxylase activity enhances acid sensitivity of Listeria monocytogenes. Food Microbiol. 2018 Feb;69:96-104.

Target

Human Endogenous Metabolite GAD

Additional Information

[1]. Fonda ML, et al. Glutamate decarboxylase. Substrate specificity and inhibition by carboxylic acids. Biochemistry. 1972 Mar 28;11(7):1304-9. [2]. Paudyal R, et al. A novel approach in acidic disinfection through inhibition of acid resistance mechanisms; Maleic acid-mediated inhibition of glutamate decarboxylase activity enhances acid sensitivity of Listeria monocytogenes. Food Microbiol. 2018 Feb;69:96-104.

Customs & Trade Information

HS Code	2917190090
Summary	2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Maleic acid?

The CAS number of Maleic acid is 110-16-7.

What are the molecular formula and molecular weight of Maleic acid?

Maleic acid has molecular formula C4H4O4 and molecular weight 116.072 g/mol.

Is Maleic acid hazardous?

Maleic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H315 — Causes skin irritation.

What are the upstream and downstream products of Maleic acid?

For Maleic acid, Downstream Products: Fumaric acid, 3-Hydroxyaspartic Acid, Glycine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Maleic acid (CAS 110-16-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21476-0 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.