High purity Tos-PEG3-methyl ester from Axispharm, this compound is a PEG linker with a tosyl group and a methyl ester. Hydrophilic PEG linkers increase the water solubility of compounds. Tosyl is a very good leaving group for nucleophilic substitution reactions. Methyl esters can be hydrolyzed under strong alkaline conditions.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.