chemicals produced in a relatively pure state; (in later use) esp. chemicals produced to a very high degree of purity for use in research and…
| 单词 | θ71541 |
| 释义 | the world > matter > chemistry > chemical substances > [noun] > chemicals > others (4) fine chemicals1839 chemicals produced in a relatively pure state; (in later use) esp. chemicals produced to a very high degree of purity for use in research and… heavy chemicals1874 chemicals produced in large quantities for industry and agriculture, often in a relatively unpure state. reagent grade1905 a grade of commercial chemicals characterized by a high standard of purity and suitable for laboratory use; frequently attributive. inorganic1945 An inorganic chemical. |
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