Difenzoquat methylsulfate Back Catalog number: 70649 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 60013 Minnesota Dept of Health List Internal Standard Price on request 677044 Non-Buffered Mix-2 Price on request 11720.12-100-IO 2,2',4,5',6-Pentachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request