EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1989.9-1G Tri-n-propyltin chloride, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 2279-76-7 Price on request 675396 2,3,6-Trichlorophenol, 10 µg/ml, Methanol, 10ml Price on request 10037.4-100MG 4-Nitrosopiperazin-2-one, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 18907-82-9 Price on request