EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9960.30-5UG 5ß(H),17 alpha(H),21ß(H)-Hopane (mix. with 0132.30), neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. Price on request 90171 Azobenzene Price on request 673891 Lufenuron, 100mg Price on request