Animal NDC 50378-021-01 Syncaine

Tricaine Methanesulfonate

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Syncaine Animal Product Labeling Information

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Table of Contents



Warnings



WARNINGS

Do not use within 21 days of harvesting fish for food. Use in fish intended for food should be restricted to Ictaluridae, Salmonidae, Esocidae, and Percidae, and water temperature exceeding 10°C (50°F). In other fish and in cold-blooded animals, SYNCAINE should be limited to hatchery or laboratory use. Avoid inhaling or getting into eyes.


Toxicology



Comparative toxicologic studies carried out on fish and frogs gave the following results:
FISH TOXCITY STUDIES - The toxicity of SYNCAINE was measured by standard methods in laboratory bioassays with rainbow trout, brown trout, brook trout, lake trout, northern pike, channel catfish, bluegill, largemoth bass and walleye. The 24, 48 and 96 hour LC50 (lethal concentration for 50 percent of the animals) values for trout ranged from 52 to 31 mg/liter; for northern pike, from 56 to 48 mg/liter; for catfish, from 66 to 50 mg/liter; for bluegill and largemouth bass, from 61 to 39 mg/liter; and for walleye, the values were 49 to 46 mg/liter.
Safety Index:The safety indices for SYNCAINE refer to the margin between concentrations which cause anesthesia and mortality. They are expressed by the quotient of the lethal concentration for 50 percent of the fish (LC50) and the effective concentration for 50 percent of the fish (EC50)

Safety Indices for Rainbow Trout and Channel Catfish at 12°C (54°F)

SpeciesExposure (min.)LC50 (mg/liter)EC50 (mg/liter)Index
Rainbow Trout1
         "
         "
Channel Catfish2
          "
          "
15
30
60
15
30
60

65
57
56
139
118
110
32
32
29
47
45
46
2.0
1.8
1.9
3.0
2.6
2.4

FROG TOXICITY STUDIES3 - Frogs were put into various concentrations of SYNCAINE for 30 minutes and then transferred to tap water in order to determine LC50. The LC50 was 6.2 percent SYNCAINE. Therefore, the anesthetic must be used in very high concentration before it is fatal to frogs.


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