Retention Time Verification Standard Back Catalog number: 51172 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680097 D4-2-Chlorophenol, 25mg Price on request MI526-100 Powder reagents for free chlorine (100 tests). Contains: 100 sachets Price on request 78010 Dichlorprop, 1000µg/ml in MTBE, 1ml Price on request