WHO 532 Standard Back Catalog number: 94154 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended HFPO-DA 2,3,3,3-Tetrafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)propanoic acid, 50µg/ml in MeOH, 1,2ml Price on request 676143 Avermectin B1b, 100 µg/ml, Acetonitrile, 1ml Price on request 83548 Formaldehyde-DNPH Price on request