Melatonin,1000 µg/mL,MeOH,1mL, Back Catalog number: 11319.13-K-ME Manufacturer: CHIRON AS Availability: In the manufacturer's stock Price on request - + Recommended 19394 EPA Method 8021B Internal Standard Price on request L20018900IO PCB No. 189, 10µg/ml in Isooctane, 10ml Price on request 78004 2,4-D Price on request