Retention Time Marker Standard Back Catalog number: 93609 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94751 3,3’-Dimethylbenzidine Price on request 73218 Dimethyl trisulfide Price on request 11984.28-K-ME (±)-Methoxyverapamil hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request