EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10916.27-K-ME (±)-Verapamil-d3 hydrochloride (N-methyl-d3) ,1000 µg base/mL,MeOH,1mL Price on request D292100 rac-cis-N-Desmethyl Sertraline Hydrochloride, 5mg Price on request 677576 TBBPA-DBPE, 250mg Price on request