DMG-PEG2000
Chemical Structural Formula:
Specifications of mPEG-DMG-2000:
| Test Items | Specifications | Test Methods | |
| Appearance | White powder-like solid | Visual | |
| Identification | IR | Complies with the reference substance structure | IR |
| H-NMR | Complies with the reference substance structure | H-NMR | |
| Average molecular weight | 2500±200 Da | MALDI-TOF | |
| Assay | 90.0% ~ 110.0% | HPLC-CAD | |
| Purity | Not less than 95.0% | HPLC-CAD | |
| Polydispersity(Mw/Mn) | Not more than 1.05 | GPC | |
| Impurities | Myr-OH | Not more than 1.00% | HPLC |
| mPEG-LMG-2K(-28) | Not more than 1.00% | HPLC | |
| mPEG-TMG-2K(-14) | Not more than 1.00% | HPLC | |
| mPEG-IMG-2K(+14) | Not more than 1.00% | HPLC | |
| mPEG-PMG-2K(+28) | Not more than 1.00% | HPLC | |
| mPEG-MA-2K | Not more than 1.00% | HPLC | |
| mPEG-MG-2K(β) | Not more than 1.00% | HPLC | |
| mPEG-MG-2K(γ) | Not more than 1.00% | HPLC | |
| Myr-EDU | Not more than 1.00% | HPLC | |
| mPEG-DOH-2K | Not more than 1.00% | HPLC | |
| TMG | Not more than 1.00% | HPLC | |
| EDU | Not more than 1000ppm | HPLC | |
| DMAP | Not more than 1000ppm | HPLC | |
| DMG-PEG-DMG-4K | Not more than 1.00% | GPC | |
| Residual Solvents | Isopropanol | Not more than 5000ppm | GC |
| Dichloromethane | Not more than 600ppm | GC | |
| n-Hexane | Not more than 290ppm | GC | |
| Tetrahydrofuran | Not more than 720ppm | GC | |
| Ethyl acetate | Not more than 5000ppm | GC | |
| Toluene | Not more than 890ppm | GC | |
| Elemental Impurities | Copper(Cu) | Not more than 30ppm | ICP-MS |
| Arsenic(As) | Not more than 1.5ppm | ICP-MS | |
| Chromium(Cr) | Not more than 0.2ppm | ICP-MS | |
| Mercury(Hg) | Not more than 0.3ppm | ICP-MS | |
| Lead(Pb) | Not more than 0.5ppm | ICP-MS | |
| Cobalt(Co) | Not more than 0.5ppm | ICP-MS | |
| Vanadium(V) | Not more than 1.0ppm | ICP-MS | |
| Nickel(Ni) | Not more than 2.0ppm | ICP-MS | |
| Lithium(Li) | Not more than 25ppm | ICP-MS | |
| Antimony(Sb) | Not more than 9ppm | ICP-MS | |
| Moisture | Not more than 1.00% | ChP<0832> | |
| Bacteriological Data | TAMC/g | Not more than 100CFU/g | ChP<1105> |
| TYMC/g | Not more than 10CFU/g | ChP<1105> | |
| Endotoxin | Not more than 0.015 EU/mg | ChP<1143> | |
Recommended Storage Conditions:
Kept at -20±5℃ under an inert atmosphere.
To reduce the moisture absorption, it should be slowly warmed to ambient temperature before opened.
Shelf Life:
24 months if stored under above conditions.
