EPA Method 524.3 - Internal Standard Back Catalog number: 95488 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679091 Flame-Retardant-Mix 4, 100 µg/ml, Methanol, 5ml Price on request 94744 2,4,5-Trimethylaniline Price on request 72723 2-Ethylbutyraldehyde Price on request