| 单词 | alpha-naphthol |
| 例句 | One of the first uses of alpha-naphthylamine has already been mentioned, viz. for the production of the Manchester yellow, which was afterwards made more advantageously from alpha-naphthol. Coal and What We Get from It Practically the only phenol that is used is the beta-naphthol; alpha-naphthol is occasionally used, but not often. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student By this means alpha-naphthol gives what is known as “acid brown,” or “fast brown,” and beta-naphthol a fine crimson, known as “fast red,” or “roccellin.” Coal and What We Get from It It is prepared in the same way as the azines of the “neutral red” group; viz. by the action of nitrosodimethylaniline on alpha-naphthol, or by oxidizing amidodimethylaniline in the presence of alpha-naphthol. Coal and What We Get from It They are also called naphthol colours from the use of beta-and alpha-naphthol in their production. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student |
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