EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11801.13-50-NN Triclosan methyl ether,50 µg/mL,n-nonane,1mL, Price on request 79008 Alachlor Price on request 50587 pH 12.0 Standard @ 25°C Price on request