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30 Απρ 2023 · Common solvent pairs include ethyl acetate and hexane, toluene and hexane, methanol and dichloromethane, and water and ethanol. Now that you understand the principles of recrystallization, let's go through a procedure for purification of an organic compound by recrystallization.
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Common solvent pairs include ethyl acetate and hexane,...
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10 Οκτ 2024 · Toluene (C 6 H 5 CH 3) is an excellent solvent for crystallization of aryl compounds and has replaced the once commonly used benzene (a weak carcinogen); a drawback is high boiling point of 111 °C (232 °F), making it difficult to remove from crystals.
Sodium p-toluenesulfonate is a toluenesulfonate ester used in organic chemical reactions as an alkylating agent, non-oxidizing catalyst, intermediate for the synthesis of biologically active compounds, and supporting electrolyte for depositing polypyrrole membranes.
Toluene is used in metal cans by a gigantic number of people without problems. Either way, if you want it clean, distil it prior to using it; university labs will do this even after buying 'pure / dry' solvent.
Table 3.1 shows a list of common solvents used with crystallization. Toluene has the highest boiling point \(\left( 111^\text{o} \text{C} \right)\) of the list, and should be avoided if alternatives exist for this reason (as well as its toxicity and smell).
Aldrich-152536; Sodium p-toluenesulfonate 0.95; CAS No.: 657-84-1; Synonyms: p-Toluenesulfonic acid sodium salt; Linear Formula: CH3C6H4SO3Na; Empirical Formula: C7H7NaO3S; find related products, papers, technical documents, MSDS & more at Sigma-Aldrich.
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