WS Disinfection By-Products - Cal Check Back Catalog number: 91837 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA15710000CY Octachlorostyrene, 100µg/mL in Cyclohexane, 1ml Price on request 11118 EPA Method 8270A - Analytes Mix #8 Price on request 683728 Acetaldehyd-DNPH, 100mg Price on request