N-Methylmaleimide , its cas register number is 930-88-1. The IPUAC name about this chemicals is 1-Methylpyrrole-2,5-dione .The index of refraction about it is 1.53, molar refractivity is 26.58 cm³, molar volume is 86 cm³ and surface tension is 46.6 dyne/cm, also, it have other chemical properties, for example, the enthalpy of vaporization about this chemicals is 43.03 kJ/mol, vapour pressure is 0.449 mmHg at 25 °C, refractive index is 1.5180 and so on. It belongs to the following product categories, such as N-Substituted Maleimides, N-Substituted Maleimides, Succinimides & Phthalimides, Carbonyl Compounds, Cyclic Imides and Organic Building Blocks.

 N-Methylmaleimide is a light yellow crystals, we can store it at 2-8 °C. If you want to use it, you shoulde be more careful, because it is harmful and toxic if swallowed or inhalation and in contact with skin, also it may causes burns and may cause sensitization by skin contact. In the use process, you need to wear suitable protective clothing, gloves and eye/face protection and in case of contact with eyes, rinse immediately with plenty of water and seek medical advice, also in case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.). However it should be kept under argon, and it is sensitive to humidity, so storge must be carful. Expect these measures, it also have some importent sfety imformations, RIDADR about it is UN 1759 8/PG 2, WGK Germany is 3, RTECS number is ON5600000, its HazardClass is 6.1, and its PackingGroup is II.
 

This chemicals can be described computed from structure:
1) Canonical SMILES: CN1C(=O)C=CC1=O
2) InChI: InChI=1S/C5H5NO2/c1-6-4(7)2-3-5(6)8/h2-3H,1H3

The most important thing about N-Methylmaleimide is the toxicity, following is the form: