140-22-7O=C(NNc1ccccc1)NNc1ccccc1KSPIHGBHKVISFI-UHFFFAOYSA-NDiphenylcarbazide is a member of phenylhydrazines.
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。
This chemical does not meet GHS hazard criteria for 4.8% (3 of 63) of reports.
Warning
H315 (95.2%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 63 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Carbonic dihydrazide, 2,2'-diphenyl-
Carbonic dihydrazide, 2,2'-diphenyl-: Does not have an individual approval but may be used under an appropriate group standard
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
解説1,5-ジフェニルカルボノヒドラジド融点175 ℃.エタノールに可溶.弱酸性で Hg2+,Cu2+,Cd2+ などと着色キレートを生じ,またCrO42-と赤紫色を呈するので,比色定量分析試薬として用いられる.森北出版「化学辞典(第2版)
用途水中等の6価クロム測定発色試薬。
用途金属(6価クロム等)の比色定量。
使用1,5-Diphenylcarbazideis a carbazide derivative used in the colorimteric determination of chromium as well as in the detection of cadmium, mercury, magnesium and aldehydes.
一般的な説明1,5-Diphenylcarbazide is a colorimetric reagent commonly employed in the determination of trace metals.
純化方法A common impurity is phenyl-semicarbazide which can be removed by chromatography: ~8g in H2O is placed on a column (polyamide 6 powder, Macherey-Nagel-GmbH-Germany, washed several times with MeOH), eluted with H2O/MeOH/AcOH (1:3:0.04) at 7-8 drops/second, then eluted with the same solvent mixture but diluted 5 fold with H2O. The purification is followed by UV light at 280nm. The effluent is evaporated to dryness in vacuo at ~28o. [chromatography, IR & UV: Willems et al. Anal Chim Acta 51 544 1970]. Recrystallise it from EtOH by adding CCl4 to induce crystallisation, or AcOH to give a white crystalline powder which turns pink in air. It is air and light sensitive and should be stored in the dark under N2. [Beilstein 15 H 292, 15 IV 182.]
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読み込み中…
140-22-7DTXSID7059690CHEBI:4641化学的特性white crystals or powder