Formaldehyde-DNPH Level 2 (0.5ug/mL) Back Catalog number: 98859 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 80413 EPA Method 8040 - Surrogate Standard Mix Price on request 79047 beta-BHC Price on request 677488 D8-Ciprofloxacin hydrochloride hydrate, 100 µg/ml, Price on request