Tricaine mesylate(Tricaine methanesulfonate,TMS,MS-222, Syncaine, Tricaine-S,), is white powder used foranesthesia,sedation, oreuthanasiaof fish. TMS is the only anesthetic licensed in the United States for fin fish that are intended for human consumption. The drug can have selective toxicity forpoikilothermsdue to their lower rate of metabolism in the liver.[1]
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| Other names | Syncaine Metacaine Tricaine MS-222 Finquel TMS |
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| ECHA InfoCard | 100.011.779 |
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| Formula | C10H15NO5S |
| Molar mass | 261.29g·mol−1 |
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| Melting point | 149.5 °C (301.1 °F) |
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Tricaine is an anaesthetic that operates by preventing sodium ions to enter the cell and thus silencingaction potentials.[2]This has the net effect of blocking signal exchange between thebrainand extremities.
MSD Animal Health is one of the largest manufacturers of Tricaine in Norway and other European markets under the brand name Finquel.[3]The largest manufacturer of Tricaine in North America is Syndel under the brand name Syncaine. Syncaine is manufactured inFerndale, Washington,in the United States.[4][better source needed]Syncaine is used for handling fish,amphibians,and other cold-blooded animals during manual spawning, as well as during marking, measuring, photography, research, surgical operations, transport, and weighing of fish.
The optimum concentration may vary with the size and species of the fish, and other variables.
It is easily soluble in water (both fresh and salt) but it drastically decreases thepHof water, increasing the acidity, which may be toxic for fish.Sodium bicarbonatecan be used to buffer the solution to a pH range of 6.5-7.5. Usually an equal amount of buffer is added to attain a neutral pH.[5]In salt/marine/sea water, the buffer use may not be necessary because sea water itself has buffering capacity[citation needed].The solution of TMS needs to be prepared freshly each time because TMS is light-sensitive and might form toxic by-products upon exposure to light[citation needed].Fish treated with Tricaine cannot be slaughtered for human consumption until a certain withdrawal period is reached, for example 21 days in the United States for Syncaine.[6]
References
edit- ^Wayson KA, Downes H, Lynn RK, Gerber N (September 1976). "Studies on the comparative pharmacology and selective toxicity of tricaine methanesulfonate: metabolism as a basis of the selective toxicity in poikilotherms".The Journal of Pharmacology and Experimental Therapeutics.198(3): 695–708.PMID185356.
- ^Carter KM, Woodley CM, Brown RS (2011)."A review of tricaine methanesulfonate for anesthesia of fish".Reviews in Fish Biology and Fisheries.21(1): 51–59.Bibcode:2011RFBF...21...51C.doi:10.1007/s11160-010-9188-0.S2CID39693748.
- ^"MSD ANIMAL HEALTH ACQUIRES SCAN AQUA AS".Fish Focus.2019-03-05.Retrieved2022-06-06.
- ^"Tricaine-S (MS-222) Fish Anesthetic | Aqualife TMS Fish Sedative".Syndel.Retrieved2019-12-12.
- ^Brown C, Pavek T. "Fish and Amphibian Euthanasia". In Bowser P (ed.).Animal Care and Use Procedure (ACUP)(PDF).Cornell University. Archived fromthe original(PDF)on 13 June 2015.
- ^"Approved Aquaculture Drugs FDA".Food and Drug Administration.26 July 2023.