Store › SiR-BCN 1mg SiR-BCN 1mg $838.00 Quantity: Add To Cart Added! SiR-BCN is a clickable derivative of SiR. It reacts with tetrazine or azide derivatives�and allows the preparation of custom SiR-conjugates SiR-BCN is a clickable derivative of SiR. It reacts with tetrazine or azide derivatives�and allows the preparation of custom SiR-conjugates