Store › SiR-NHS ester 5mg SiR-NHS ester 5mg $1,794.00 Quantity: Add To Cart Added! SiR-NHS ester is the active ester form of SiR. SiR-NHS ester reacts with amines to form stable covalent amide bond SiR-NHS ester is the active ester form of SiR. SiR-NHS ester reacts with amines to form stable covalent amide bond
