EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA11790000AL Cyanazine, 100μg/mL in Acetonitrile, 1ml Price on request 11887.13-250MG Procaine hydrochloride,neat,neat,250mg, Price on request 95360 Spike Mix Price on request