106-34-3O=C1C=CC(=O)C=C1.Oc1ccc(O)cc1BDJXVNRFAQSMAA-UHFFFAOYSA-NQuinhydrone is an addition compound. It contains a 1,4-benzoquinone and a hydroquinone.
106-34-3DTXSID9059337CHEBI:26491安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
Danger
H301 (100%): Toxic if swallowed [Danger Acute toxicity, oral]
P261, P264, P264+P265, P270, P271, P273, P280, P301+P316, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 48 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: 2,5-Cyclohexadiene-1, 4-dione, compound with 1,4-benzenediol (1:1)
Quinhydrone: Does not have an individual approval but may be used under an appropriate group standard
0.68 [mg/m3]
7.4 [mg/m3]
45 [mg/m3]
解説キンヒドロン,青緑色の光沢をもつ赤褐色の結晶.融点171 ℃.エタノール,エーテルに易溶,水に不溶.溶液中では大部分両成分に解離している.キンヒドロン電極として水素イオン指数の測定に利用される.森北出版「化学辞典(第2版)
用途キンヒドロン電極用。
使用In pH determinations (quinhydrone electrode).
一般的な説明Quinhydrone/methanol treatment for the measurement of carrier lifetime in crystalline silicon substrates has been reported. Surface passivation of silicon substrates by quinhydrone/ethanol treatment has been investigated.
純化方法Crystallise quinhydrone from H2O at 65o , then dry it in vacuo.[Beilstein 7 H 617, 7 IV 2069.]
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読み込み中…
化学的特性a dark green crystalline powder which is a complex formed by benzoquinone and hydroquinone. Quinhydrone is a general reagent used in potentiometric titrations. It can also be used as a π-acceptor in the formation of charge-transfer complex of analytes for spectrophotometric analysis.
定義The so-called quinhydrone electrode, containing equivalent amounts of p-benzoquinone and hydroquinone, is used to determine hydrogen ion concentrations of unknown solutions. Hydroquinone is used principally as a photographic developing agent. The main advantages of the quinhydrone electrode are low internal resistance, rapid response, high accuracy, simplicity, free of errors due to the presence of nonreducing gases, and free of salt errors. Major limitations are that it contaminates the solution, cannot be used to monitor a flowing solution, the solution must be free of strong oxidizing and reducing agents, and it is limited to a pH range of 1 to 9. In alkaline solution, the weakly acidic H2Q is neutralized and is subject to oxidation by air and dissolved oxygen. The main application of the quinhydrone electrode is in nonaqueous solvents where reproducible results are obtained in a variety of solvents. The tetra-chloro derivative (chloranil electrode) is even more useful.