WS Amp 2 Trace Elements Back Catalog number: 52128 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 90007 BTEX Standard Price on request BPB 2,2-Bis(4-hydroxyphenyl)butane, 1.2ml x 50ug/ml, methanol Price on request 677653 D6-alpha-HCH, 100 µg/ml, Cyclohexane, 1ml Price on request