EPA Method 551.1 - Analytes Mix “A” Back Catalog number: 30100 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA14464800AL 1-(4-Isopropylphenly)-3-methylurea, 100µg/mL in Acetonitrile, 1ml Price on request 50766 Ammonium hydroxide Solution Price on request 97935 Surrogate Standard Price on request