Internal Reference Standard Back Catalog number: 52187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674475 Pentachlorothioanisole, 100mg Price on request 57074 Tungsten (W) Price on request L15620200CY trans-Nonachlor, 10µg/mL in Cyclohexane, 10ml Price on request