2-Butenedioicacid (2Z)-

The Maleic acid, with the CAS registry number 110-16-7 and EINECS registry number 203-742-5, has the IUPAC name of (Z)-but-2-enedioic acid. And the molecular formula of this chemical is C₄H₄O₄. It is a kind of white solid, and belongs to the product category of Miscellaneous. This dicarboxylic acid is the cis isomer of butenedioic acid, whereas fumaric acid is the trans isomer.

The physical properties of Maleic acid are as following: (1)ACD/LogP: -0.01; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 1; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 4; (8)#H bond donors: 2; (9)#Freely Rotating Bonds: 2; (10)Polar Surface Area: 52.6 Å²; (11)Index of Refraction: 1.526; (12)Molar Refractivity: 23.76 cm³; (13)Molar Volume: 77.4 cm³; (14)Polarizability: 9.42×10^-24cm³; (15)Surface Tension: 67.6 dyne/cm; (16)Density: 1.499 g/cm³; (17)Flash Point: 183 °C; (18)Enthalpy of Vaporization: 65.99 kJ/mol; (19)Boiling Point: 355.5 °C at 760 mmHg; (20)Vapour Pressure: 5.19E-06 mmHg at 25°C.

Preparation of Maleic acid: In industry, it is derived by hydrolysis of maleic anhydride, the latter being produced by oxidation of benzene or butane. It can also be prepared by the hydrolyzation of maleic anhydride, and the maleic anhydride can be obtained from malic acid in the presence of acetyl chloride.

Uses of Maleic acid: It is mainly used as a precursor to fumaric acid, and relative to its parent maleic anhydride, maleic acid has few applications. It is also used in pesticide marathon, fumaric acid, unsaturated polyester and dyeing auxiliary.

You should be cautious while dealing with this chemical. It irritates eyes, respiratory system and skin, and it is also harmful if swallowed. Therefore, you had better take the following instructions: Wear suitable gloves, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(O)\C=C/C(=O)O
(2)InChI: InChI=1/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1-
(3)InChIKey: VZCYOOQTPOCHFL-UPHRSURJBG

The toxicity data is as follows: