Western Chemical’s Tricaine-S (MS-222, TMS, tricaine methanesulfonate) is an FDA approved fish anesthetic (FDA ANADA 200-226) used for the temporary immobilization of fish, amphibians, and other aquatic cold-blooded animals (poikilotherms). Tricaine-S has long been recognized as a valuable tool for the proper handling of these animals during manual spawning (fish stripping), weighing, measuring, marking, surgical operations, transport, photography, and research.
Western Chemical is the world's largest manufacturer of Tricaine-S. It is made in our FDA inspected Ferndale, Washington USA manufacturing plant according to Good Manufacturing Practices (GMP) and Good Laboratory Practices (GLP), which ensures the purity, strength, and quality of the product.
Tricaine-S (MS-222) is a fine crystalline powder fish anesthetic that is mixed with water prior to use. MS-222 is safe and effective for the anesthesia of fish when used as directed. Directions for using Tricaine-S can be viewed by clicking the link on the Product Downloads tab.
The American Fisheries Society - Fish Culture Section's Working Group on Aquaculture Drugs, Chemicals, and Biologics (WGADCB) has published a Guide to Using Drugs, Biologics and Other Chemicals in Aquaculture. WGADCB have also developed a Treatment Calculator to assist in the dosage calculations of certain products.
The Guide is provided as an Adobe PDF file and the Treatment Calculator is offered as a Microsoft Excel 2007 file. Your computer must have installed either Microsoft Excel or any other program that will read and execute calculations of an Excel file.
The Guide and Treatment Calculator can be found by clicking the link below
*Although the calculator has been checked for accuracy and can be a useful tool to aid in calculating treatment dosages, the end user is responsible for correctly applying any regulated compound in aquaculture