Isoprene Back Catalog number: 34521 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4057-K-TX5 Sulfur Calibration Stock Solution Thiophene 1000 µg/mL in Toluene; unit: 5x1mL ampoules Please request for diluted samples in the range 1 to 1000 ng/mL. Price on request 682123 PCB 138, 10.0 µg/ml, Isooctane, 10ml Price on request 677353 Fluorene, 100mg Price on request