Method for producing hetero-type monodisperse polyethylene glycol and intermediate for producing hetero-type monodisperse polyethylene glycol

摘要

Provided is a hetero type monodispersed polyethylene glycol which contains a compound represented by formula (1) ((1): NH 2 -(CH 2 CH 2 O) a -CH 2 CH 2 COOH (in formula (1), a is an integer between 6 and 40)) and in which the following each satisfy a specified relational expression: (A) a chromatogram detected by a differential refractometer when separation is carried out using reversed phase chromatography; (B) a chromatogram detected by a differential refractometer when separation is carried out using cation exchange chromatography; and (C) a chromatogram detected by a differential refractometer when the hetero type monodispersed polyethylene glycol containing a compound represented by formula (1) is derivatized and separation is carried out using anion exchange chromatography.