Internal Standard ASTM D-5307 Back Catalog number: 51124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4503-3-25LW Phosphorous Standards Phosphorus in Light White Mineral Oil, 20Cst Tri-n-butylphosphate, 99+% (Chiron product nr. 1399.19) CAS [126-73-8] Matrix: Isooctane , 20cSt Units: 1x25mL, 1x100mL Isooctane Price on request 70861 Thiophanate methyl Price on request MDD-12478 1,2,4,7,8-Pentachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene Price on request