JenKem Technology ‘s multiarm PEG raw materials (4arm PEG, 6arm PEG, and 8arm PEG) are suitable for further derivatization into PEG derivatives. JenKem PEG raw materials are very high quality PEGs with very low polydispersity, and low or no diol content. JenKem Technology also provides PEG GPC Standard Kits for 4arm PEGs with MW of 2kDa, 5kDa, 10kDa, 20kDa and 40kDa. JenKem PEG raw materials are sold in bulk without purification after polymerization. Please contact us at firstname.lastname@example.org for inquiries on the availability of purified or research grade PEG raw materials, or custom GPC PEG standard kits.