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单词
para-toluenesulfonic acid
释义
para-toluenesulfonic acid
para
-toluenesulfonic acid
[
¦par·ə ¦täl·yə‚wēn¦səl¦fän·ik ′as·əd
]
(organic chemistry)
C
6
H
4
(SO
3
H)(CH
3
) Toxic, colorless, combustible crystals soluble in water, alcohol, and ether; melts at 107°C; used in dyes and as a chemical intermediate and organic catalyst.
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castrum
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cast/run an eye/your eyes over something
castrén, matthias alexander
casts
casts about
casts about for
casts a long shadow
casts an eye on
casts an eye on it
casts around
casts aside
casts a veil over
casts back
casts bread upon the waters
casts doubt
casts doubts
casts down
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更新时间:2026/7/26 15:57:15