CRM-dcGTX2&3-c is a certified calibration solution designed for use in chemical analysis methods. Each ampoule contains ~0.5 mL solution of a mixture of decarbamoylgonyautoxin-2 at a concentration of 100.1 µM and decarbamoylgonyautoxin-3 at a concentration of 29.4 µM in filtered, aqueous 0.5 mM hydrochloric acid.