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(Wikipedia excerpt:.. “..Desiccators (D) are sealable enclosures containing desiccants used for preserving moisture-sensitive items such as cobalt chloride paper for another use. A common use for (D) is to protect chemicals which are hygroscopic or which react with water from humidity. The contents of (D) are exposed to atmospheric moisture whenever the (D) are opened. It also requires some time to achieve a low humidity. Hence they are not appropriate for storing chemicals which react quickly or violently with atmospheric moisture such as the alkali metals; a glovebox or Schlenk-type apparatus may be more suitable for these purposes………’)
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