4arm PEG SCM (4arm PEG NHS Ester). Hydrogel PEG. This is the activated form of 4ARM-COOH. Synonyms: 4arm-PEG-Succinimidyl Carboxymethyl Ester Linear Structural Formula: C(CH2O(CH2CH2O)nCH2COOC4H4O2N)4 Storage: -20C Application: Applications may include: bioconjugation, drug delivery, PEG hydrogel,...