Internal Standard Back Catalog number: 90396 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92805 Gas Internal/Surrogate Standard Price on request X9177 Pentachlorophenol Price on request 1530.13-K-IOX5 Fluorene-d10, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 81103-79-9 Price on request