mPEG-maleimide
- Product Numbers: P202
- CAS: 99126-64-4
- Product description: ω-methoxy-a-[2-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-ethyl]poly(oxy-1,2-ethanediyl) Monomethoxy polyethylene glycol-maleimide mPEG-maleimide Mal-mPEG
Chemical structure
n = ca. 120
CH3O(C2H4O)n-CH2CH2 -C4H2NO2
CAS No.: 99126-64-4
Mw:ca. 5000
Polydispersity <1.05
diol content of mPEG starting material < 1%
Product identification
ω-methoxy-a-[2-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-ethyl]poly(oxy-1,2-ethanediyl)
Monomethoxy polyethylene glycol-maleimide
mPEG-maleimide
Mal-mPEG
Physical properties
Melting point :65-67℃
Appearance: White to off-white powder
Storage Temperature: -10~-20 ℃
Solubility: soluble in water, methanol, ethanol, Dichloromethane; insoluble in ether
Key Specifications
| Specification | Characteristic | Requirement/Method |
| Physical | Color/Appearance |
White Powder (Visual) |
| Foreign Material |
No Visually Detectable (Visual) |
|
| Chemical | Identity |
Conforms to Standard (NMR) |
| Substitution |
≥ 90% (NMR) |
|
| Purity |
≥ 95% (HPLC) |
|
|
Molecular Weight (PEG raw material) |
5,000 ± 500 Da (MALDI or GFC) |
|
|
Polydispersity (PEG raw material) |
≤1.05 (GFC) |
|
| moisture content | <0.1% |
Stability & Storage
mPEG-maleimide can be stored in an inert atmosphere for ca 12 months from the date of manufacture in the unopened original container at -10°C to -20°C. The product has to be re-tested after 1 year.
