EPA 1620 Standard 2 Back Catalog number: 52140 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA12143000AL Demeton-S-methyl, 100µg/mL in Acetonitrile, 1ml Price on request 79085 Alachlor Price on request 55213 Medical Marijuana Heavy Metals Price on request