128-53-0

Name N-Ethylmaleimide
CAS 128-53-0
EINECS(EC#) 204-892-4
Molecular Formula C6H7NO2
MDL Number MFCD00005509
Molecular Weight 125.13
MOL File 128-53-0.mol
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Chemical Properties

Appearance White solid
Melting point  43-46 °C(lit.)
Boiling point  210 °C(lit.)
density  1.2500 (rough estimate)
refractive index  1.4430 (estimate)
Fp  73 °C
storage temp.  2-8°C
solubility  methanol: 1 M at 20 °C, clear, colorless
form  Crystalline Powder
pka -2.18±0.20(Predicted)
color  White to off-white
Stability: Stable. Combustible. Incompatible with strong oxidizing agents. Refrigerate.
biological source synthetic (organic)
Water Solubility  1 g/L (20 ºC)
Sensitive  Light Sensitive
Merck  14,3822
BRN  112448
InChI 1S/C6H7NO2/c1-2-7-5(8)3-4-6(7)9/h3-4H,2H2,1H3
InChIKey HDFGOPSGAURCEO-UHFFFAOYSA-N
SMILES CCN1C(=O)C=CC1=O || CCN1C(=O)C=CC1=O
CAS DataBase Reference 128-53-0(CAS DataBase Reference)
NIST Chemistry Reference 1H-pyrrole-2,5-dione, 1-ethyl-(128-53-0)
Storage Precautions Store under nitrogen
EPA Substance Registry System N-Ethylmaleimide (128-53-0)
Absorption cut-off at 382nm in methanol at 1M
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Safety Data

Symbol(GHS)  Corrosion (GHS05)Skull and Crossbones (GHS06)
GHS05,GHS06
Signal word  Danger
Hazard statements  H300-H311-H314-H317
Precautionary statements  P260-P280-P301+P310+P330-P303+P361+P353-P305+P351+P338+P310
Hazard Codes  T+
Risk Statements 
R21:Harmful in contact with skin.
R28:Very Toxic if swallowed.
R34:Causes burns.
R43:May cause sensitization by skin contact.
R20/21:Harmful by inhalation and in contact with skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
RIDADR  UN 2928 6.1/PG 2
WGK Germany  3
RTECS  UX9625000
F  19
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  29251900
Storage Class 6.1A - Combustible acute toxic Cat. 1 and 2
very toxic hazardous materials
Hazard Classifications Acute Tox. 2 Oral
Acute Tox. 3 Dermal
Eye Dam. 1
Skin Corr. 1B
Skin Sens. 1
Safety Profile
Poison by intraperitoneal route. Human mutation data reported. Vapors are hlghly irritating. When heated to decomposition it emits toxic fumes of NOx.

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