ANESTHETIC FOR FISHES, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR DISCRIMINATING EXPIRATION DATE OF THE ANESTHETIC FOR FISHES

Japanese Patent JP2015120641

A

PROBLEM TO BE SOLVED: To provide a solid anesthetic for fishes by utilizing carbon dioxide derived from sodium hydrogen carbonate, in which whether an anesthetic effect of the solid anesthetic for fishes has been lost by the anesthetic absorbing moisture in the air or the like during storage or not is easily discriminated, and technique relating to a method for manufacturing the same and a method for discriminating an expiration date of the solid anesthetic for fishes.SOLUTION: Provided is the solid anesthetic for fishes, with which an expiration date can be discriminated by color tone change of water-soluble pigment, comprises sodium hydrogen carbonate, organic acid (e.g., succinic acid), and water-soluble pigment which is a food additive (e.g., cochineal extract). The solid anesthetic for fishes is characterized in that the water-soluble pigment exists on a part of the surface of the anesthetic for fishes so that color tone change of the water-soluble pigment can be observed with the naked eye. Also provided are a method for manufacturing the solid anesthetic for fishes, and a method for discriminating an expiration date of the solid anesthetic for fishes, which solve problems with conventional anesthetics for fishes.

WATANABE KENICHI
MATSUBARA SO

JP2013263686A

July 02, 2015

December 20, 2013

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UNIV TOKYO AGRICULTURE
FISHERIES RESEARCH AGENCY

A61K33/10; A01K61/00; A61K47/10; A61K47/12; A61K47/46; A61P23/00

JP2007186476A

2007-07-26

Yoshinaga Takahiro

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