补充描述:
4'-Aminobenzo-18-crown-6 (CAS 68941-06-0) is manufactured directly by Speranza Chemical Co., Ltd. to pharmaceutical grade at a purity of 97% or higher, under the company's in-house standards. It is sold across North America, Central/South America, Europe, Australasia, Asia, the Middle East and Africa, though no samples are currently offered.
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