Pyrocatechol Violet is a complexometric indicator dye. This phthalein dye chelates metals to form blue to blue-violet complexs. It is also a pH indicator with a transition interval from 0 - 8 (red to violet). It is known to be unstable when alkaline. The stability is improved at a neutral pH. When the pH is between 2-7 the color may be yellow.
百里香酚酞 ,AR
1,2,4-三氯苯，光谱纯
1,2-二氯乙烷，for s...
碳酸氢钠 色谱级, ≥99...
二甲基黄 ,指示剂
二甲基亚砜 ,ACS, ≥9...
二硫化碳 ,无水级, ≥99...
二氯甲烷 ,AR,99.5%...
碳酸氢钠，≥99% 
Β-萘磺酸钠，98% 
刚果红,98.5%
中性红 指示剂
甲基红，98%
铝试剂 指示剂
钙羧酸指示剂
乙酸乙酯 ,for LC-M...
溴酚蓝 ,Indicator
氯苯 ,无水级, 99.5%
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