| 摘要 |
PROBLEM TO BE SOLVED: To obtain an oxygen-detecting agent that is stable against light and heat and can fully demonstrate a desired oxygen detection capacity over a long period by including cysteine and thiazine and/or indigo coloring matter. SOLUTION: An oxygen detection agent contains at least one type (cysteine) being selected from cysteine, its salt, ester and N-acyl derivative and thazine and/or indigo coloring matter. The cysteine may be either of L-body, DL-body, and D-body, and for example acid salt can be illustrated as its salt. Also, alkylester such as methylester and ethylester can be illustrated as its ester, and for example acetyl derivative and benzyl derivative can be illustrated as N-acyl derivative. The oxygen-detecting agent has improved performance and also the detection agent itself has a function as a deoxygenation agent with a deoxygenation capacity and an oxygen absorption capacity.
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