| 释义 |
DictionarySeeredmethyl red
methyl red[′meth·əl ′red] (organic chemistry) (CH3)2NC6H4NNC6H4COOH A dark red powder or violet crystals with a melting point of 180°C; soluble in alcohol, ether, and glacial acetic acid; used as an acid-base indicator (pH 4.2-6.2). methyl red
meth·yl red (meth'il red), A weakly acid dye used as a pH indicator (red at 4.8, yellow at 6); easily reduced with loss of color and pH readings must be made rapidly.methyl redAn indicator of pH. It is red at pH 4.4 and yellow at 6.2. CAS # 493-52-7See also: red |