QC-21 Back Catalog number: 59162 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 684462 Pydiflumetofen, 10mg Price on request 54212 Ammonia as (NH4+) Price on request XA11340100DO Chlormequat-chloride D4, 100µg/mL in DO, 1ml Price on request