| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-soluble azulene liquid which has the stability of azulene in an acidic region, does not become cloudy by the addition of a quaternary ammonium salt, and has the sterilization action of the quaternary ammonium salt. SOLUTION: This acidic water-soluble azulene liquid containing an alkali metal azulenesulfonate is characterized by containing the alkali metal azulenesulfonate, cetylpyridinum chloride, and/or benzalkonium chloride, and not containing a bicarbonate.
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