Total Organic Water Supply (WS) (Kit) Back Catalog number: 38087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71823 1-Chloro-3,4-dinitrobenzene Price on request 677708 Biuret, 100mg Price on request EPA-533ES EPA Method 533 Isotope Dilution Standard PDS, 1.2ml, methanol Price on request