Chloral

trichloroacetaldehyde. _{C 2} HCl ₃ O (147.39). CCl ₃ CHO. It is synthesized by hydrolysis of hemiacetal Cl ₃ CCH(OH)OC ₂ H ₅ produced by chlorination of ethyl alcohol. It is a colorless liquid with a pungent odor. Its melting point is -57 °C, its boiling point is 98 °C. It is 1.512. It is converted to chloral hydrate CCl ₃ CH(OH) ₂ by the addition of an equal molar amount of water. Chloral hydrate is a colorless plate-like crystal. Its melting point is 57 °C, its boiling point is 96-98 °C (it dissociates into chloral and water). It is easily soluble in water. _{LD 50} 479 mg/kg (rat, oral). Chloral can be obtained by adding concentrated sulfuric acid to chloral hydrate and distilling it. It is used as a reagent for detecting and quantifying silver, as well as a hypnotic agent. [CAS 75-87-6]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

trichloroacetaldehyde．C₂HCl₃O(147.39)．CCl₃CHO．エチルアルコールの塩素化で生成するヘミアセタールCl₃CCH(OH)OC₂H₅を加水分解して合成する．刺激臭のある無色の液体．融点－57 ℃，沸点98 ℃．1.512．1.512．等モル量の水を加えると発熱して抱水クロラールCCl₃CH(OH)₂に変化する．抱水クロラールは無色の板状晶．融点57 ℃，沸点96～98 ℃(クロラールと水に解離)．水に易溶．LD₅₀ 479 mg/kg(ラット，経口)．抱水クロラールに濃硫酸を加えて蒸留すればクロラールが得られる．銀の検出および定量試薬のほか催眠剤として用いられる．[CAS 75-87-6]

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