| thymol blue |
an indicator, thymolsulfonphthalein, with an acid pH range of 1.2 to 2.8, being red at 1.2 and yellow at 2.8, and an alkaline pH range of 8.0 to 9.6, being yellow at 8.0 and blue at 9.6.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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