The color development material and with radiation detection label null expression

摘要

PROBLEM TO BE SOLVED: To provide a coloring agent for radiation detection for developing a color by sensing a low-level radiation having a low concentration.;SOLUTION: This coloring agent for radiation detection for developing a color by irradiation of a radiation includes a phenoxazine-based compound shown by the formula (1). In the formula, X is an oxygen atom or a sulfur atom, and R¹¹, R¹², R¹³, R¹⁴ are the same or different hydrogen atoms or alkyl groups having the carbon number of 1-4, and when X is a sulfur atom, R¹⁵ is a halogen atom, an alkyl group having the carbon number of 1-4 which may be substituted with a halogen atom, an alkoxy group having the carbon number of 1-4 which may be substituted with a halogen atom or a phenoxy group or a naphthoxy group which may be substituted with a nitro group, and when X is an oxygen atom, R¹⁵ is a mono- or di-alkylamino group (in this case, the carbon number of the alkyl group is 1-8), a cycloalkylamino group having the carbon number of 5-7, a piperidyl group or a morpholino group.;COPYRIGHT: (C)2007,JPO&INPIT