Formaldehyde-DNPH Level 4 (2ug/mL) Back Catalog number: 98861 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681819 2-Methyl-1,2-benzisothiazolin-3-one, 25mg Price on request 0916.14-500-IO 2,5-Dimethyldiphenylsulfide, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16704-47-3 Price on request 673333 Isoproturon, 100 µg/ml, Acetonitrile, 5ml Price on request