EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92266 Cholesterol & Coprostanol Price on request 51097 Paraffins - ASTM 1319 Price on request 4TCS 4,5-Dichloro-2-(2,4-dichlorophenoxy)phenol (4-Chlorotriclosan), 1.2ml x 50ug/ml, nonane Price on request