| 单词 | 指示剂 |
| 释义 | 〔gallein〕A brown or metallic green dye, C20H 12O 7, used as a pH indicator and in dyeing textiles. 倍因：一种棕色或金属绿色染料，C20H 12O 7，用作酸碱指示剂和用于给丝织物染色 〔phenolphthalein〕A white or pale yellow crystalline powder, C20H 14O 4, used as an acid-base indicator, in making dyes, and in medicine as a laxative. 苯酚酞：一种白色或淡黄色的晶体粉末，C20H 14O 4，用作酸性指示剂，用于制染料，并在医学上用作一种轻泻剂 〔tritium〕A rare radioactive hydrogen isotope with atomic mass 3 and half-life 12.5 years, prepared artificially for use as a tracer and as a constituent of hydrogen bombs.氘：氢的放射性稀有同位素，原子量为3，半衰期12.5年，人工配制可用作指示剂和氢弹的组成部分〔cochineal〕A red dye made of the dried and pulverized bodies of female cochineal insects. It is used as a biological stain and as an indicator in acid-base titrations.胭脂红：由雌胭脂虫虫体干燥并研成粉末制成的一种红色染料。用作生物着色剂和酸基滴定指示剂〔hematein〕A reddish-brown crystalline compound, C16H 12O 6, used as an indicator and a biological stain. 氧化苏木精：一种红褐色的晶体化合物，C16H 12O 6，用作指示剂及生物着色剂 |
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