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LC2627 Diethyl maleate
for synthesis


Order number Packaging Quantity Price €
AC29627 Glass bottle 250 ml 11.88
AC29627 Glass bottle 1 L 37.60


Product information
Synonyms Maleic acid diethyl ester
Hill Formula C8H12O4
Chemical formula C2H5OOCCH=CHCOOC2H5
HS Code 2917 19 90
EC number 205-451-9
Molar mass 172.18 g/mol
CAS number 141-05-9


Chemical and physical data
Solubility 14 mg/l (30 °C)
Melting point -11 °C
Molar mass 172.18 g/mol
Density 1.07 g/cm3 (20 °C)
Boiling point 222 – 225 °C
Vapor pressure 1.33 hPa (57 °C)
Flash point 93 °C
Refractive index 1.439 (20 °C, 589 nm)


Safety information according to GHS
Hazard Statement(s) H315: Causes skin irritation.
H335: May cause respiratory irritation.
H412: Harmful to aquatic life with long lasting effects.
Precautionary Statement(s) P273: Avoid release to the environment.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
Signal Word Warning
Hazard Pictogram(s)
Storage class 10 Combustible liquids not in Storage Class 3
WGK WGK 1 slightly water endangering
Disposal 3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.


Safety information
R Phrase R 37/38-52/53
Irritating to respiratory system and skin.Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase S 61
Avoid release to the environment. Refer to special instructions/ Safety data sheets.
Categories of danger irritant, dangerous for the environment
Hazard Symbol Irritant


Toxicological data
LD 50 oral LD50 rat 3200 mg/kg
LD 50 dermal LD50 rabbit 4268 mg/kg


Assay (GC, area%) ∼95%
Density (d 20 °C/ 4 °C) 1.066 – 1.068
Diethyl fumarate (GC, area%) ∼4%
Identity (IR) passes test