Internal Standard Back Catalog number: 90396 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677612 Halosulfuron (free acid), 10mg Price on request 81212 EPA Method 8121 Analytes, 1000µg/ml in HE:TO [1:1], 1ml Price on request 2182.48-10MG n-Octatetracontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 7098-26-2 Price on request