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MS-222 is our leading product!

We are the Exclusive, Original Primary, (Non-generic) USFDA Licensed MS-222 Manufacturer in the U.S!!




ORIGINAL PATENTED FINQUEL®                                    “GENERIC PRODUCT”




Finquel® / MS-222®


Patent Granted 1928

82 Years in worldwide circulation

Manufacture: Original Swiss Patent Procedure*

Units sold = Hundreds of Thousands

Packaging: Nonreactive, photo resistant amber glass

Used in thousands of scientific research articles

USFDA registered as Original NADA 5 decades ago

Cost; worthwhile

“Generic Product”






Non-Eco friendly plastic


Generic copy no R&D



* Taken over from Novartis "Sandoz Pharma Switzerland"                                  


Finquel® is one of several hundred drug, chemical, biologic and nutraceutical original products offered by the Argent Laboratories Group.



Shouldn’t you be talking to Argent?


99.5% Pure Tricaine Methanesulfonate

FDA Approved for Aquaculture

FINQUEL MS-222 is the most widely used and trusted anesthetic for aquatic animal use in aquaculture, fishery and veterinary settings. The FINQUEL brand sets the standard for quality, safety and potency backed by Argent's twenty-five years of manufacturing experience with the chemical synthesis of Tricaine Methanesulfonate.

FINQUEL MS-222 is a fine white powder packaged in amber glass bottles of 5, 100, or 1000 grams administered by bath or spray to induce sedation or anesthesia. Since 1987, more than ten thousand FINQUEL MS-222 product units have been FDA approved and distributed around the world.

The wide ranging popularity of FINQUEL MS-222 can be attributed to its quality, availability and ease of use: Aquatic animals readily absorb it across the gill tissue, the degree of sedation or anesthesia is easily varied for a wide variety of applications, and animals recover rapidly after exposure and resume normal physiological and behavioral functions.

FINQUEL MS-222 is used for a multitude of beneficial applications ranging from the spawning of genetically selected rainbow trout or prize winning ornamental Koi, to the collection of marine reef fish, and the protection of endangered Pacific salmon. Other widely accepted and safe uses include sedation or anesthesia of aquatic species for trans-shipment, sorting and grading of farmed fish, sampling of captive and native populations, biological and physiological research, surgery, and health examination.

One example of grand proportions and success is the use of FINQUEL MS-222 in the Pacific salmon code-wire-tagging program. Every year over 40 million juvenile salmon and steelhead are anesthetized with FINQUEL MS-222, coded-wire-tagged and released into the Pacific Ocean fishery. By the year 2000, more than 1 billion fish will have been so processed, entrusted to the quality care of "fish tagging" professionals using Argent's FINQUEL MS-222.

The success of the Pacific salmon coded-wire-tag program is a testimony to good fish management practices and to the quality and reliability of FINQUEL MS-222. In related QC studies, FINQUEL MS-222 has been thoroughly examined and shown not to affect the growth, survival, catch rate, or return rate of the fish.

Confidence in the efficacy and safety of FINQUEL MS-222 use is so great that in 1997 the product was used to anesthetize every hatchery reared juvenile steelhead trout in the Pacific Northwest for the purpose of fin clipping. Fin clipping is a management tool used to identify "hatchery" steelhead, allowing fisherman to retain fish of hatchery origin and release fish with intact fins (steelhead from natural reproduction) to help preserve native fish populations. The program is scheduled to be expanded to include hatchery coho salmon. In these and numerous local enhancement programs the use of FINQUEL MS-222 is a valuable tool to help in the rehabilitation of watersheds and their native fish populations, including fish which are to be listed as threatened or endangered salmon species.

For more information on FINQUEL MS-222 or to place an order call: Toll Free 1-800-426-6258 or buy direct from Argent's on-line electronic commerce catalog at www.argent-labs.com


FINQUEL is intended for the temporary immobilization of fish, amphibians, and other aquatic, cold-blooded animals. It 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.


FINQUEL is effective and safe for the anesthesia of fish when used as directed. Its use is governed by, and can be tailored to, the needs of individual fishery personnel. Sedation and various rates of anesthetization are controlled by the concentration. The versatility of FINQUEL is demonstrated by the fact that it has been used in fisheries at levels ranging from 10 to 1,000 mg./liter. The action of the anesthetic is slowed at cooler temperatures, in extremely soft water (approximately 10 mg./liter of CaCO3. or less), and in larger fish. Also, efficacy may vary with species. Thus, it is imperative that preliminary tests of anesthetic solution be made against small numbers of fish to determine the desired rates of anesthesia and exposure times for the specific lots of fish under prevailing conditions.


1. General anesthesia: - For most situations where rapid or moderately rapid anesthesia is required, FINQUEL may be applied in a bath, i.e., the fish are immersed in the anesthetic solution. Containers may be of glass, plastic, steel, aluminum, or other suitable material. However, do not use galvanized or brass containers unlless treated or sealed to prevent dissolution of zinc. Size of container is determined by individual needs, but the fish should not be overcrowded. Discard anesthetic solutions when a loss in potency is noted, or when the solutions become fouled with mucus or excrement.

2. For surgery and certain physiologic studies, the fish may be anesthetized to loss of reflex, removed from the anesthetic, and then positioned so that the gills are bathed in a sedating concentration of FINQUEL. Some investigations have developed flowing, recirculating systems for bathing the gills with anesthetic during surgery.

Large fishes such as sharks and rays are anesthetized within minutes by spraying the gills with a 1 g./liter solution of FINQUEL. The application is made by means of a water pistol, bulb syringe, hand pump, etc.

3. Transport - FINQUEL has been used to sedate fish during transport. It is more successful in cold than in warm water, and it is instrumental in reducing injuries because of hyperactivity. Fish are usually transported by means of distribution units (tank trucks), or by air in plastic bags. In either case, the fish should be fasted before-hand to reduce metabolic wastes. Aslo, some workers suggest pretransport sedation for several hours to lower metabolism. With distribution units, the fish may be fasted and sedated prior to loading. The anesthetic solution is prepared in the distribution unit and oxygenated. Then, the fish are added and temperature acclimated.

In air shipments, the anesthetic solution is placed in a suitable plastic bag, the sedated fish are added, the bag inflated with oxygen, tied securely, and placed in a second bag. This bag is also tied, and then placed on ice in an insulated container. A modification of this method involveds complete anesthesia of the fish, and placing them in water bags which contain no anesthetic. In any case, upon arrival, the fish should be acclimated slowly to new environmental temperatures.

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You can also order through mail : Argent Chemical Laboratories, Inc., 8702  152 Ave. NE, Redmond, WA 98052.  Tel: 425-885-3777 or Toll free in 1-800-426-6258 (Canada, US, Mexico), Fax: 425-885-2112,


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