Detail of "106-34-3"

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CAS Number:
106-34-3
Name:
Quinhydrone
Molecular Structure:
Formula:
C₆H₆O₂^.C₆H₄O₂
Molecular Weight:
218.21
Synonyms:
p-Benzoquinone-hydroquinone compound (1:1);2,5-Cyclohexadiene-1,4-dione, compd. with 1,4-benzenediol (1:1);p-Benzoquinone, compd. with hydroquinone (1:1);Green hydroquinone;benzene-1,4-diol; cyclohexa-2,5-diene-1,4-dione;Hydroquinone(HQ);2,5-Cyclohexadiene-1,4-dione compd. with 1,4-benzenediol (1:1);Hydroquinone, compd. with p-benzoquinone;p-Benzoquinhydrone;Chinhydron [Czech];p-Benzoquinone, compd. with hydroquinone;2,5-Cyclohexadiene-1,4-dione,compounds,compd. with 1,4-benzenediol (1:1);2, 5-Cyclohexadiene-1,4-dione, compd. with 1,4-benzenediol (1:1);
EINECS:
203-387-6
Density:
1.40
Melting Point:
167-172 °C(lit.)
Boiling Point:
286 °C at 760 mmHg
Flash Point:
141.6 °C
Solubility:
4 g/L (20 °C) in water
Appearance:
green crystalline powder
Hazard Symbols:
Xn, N
Risk Codes:
22-36/37/38-50
Safety:
26-36-61-37/39-29 Details
Transport Information:
UN 2811 6.1/PG 3

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Standard potentials of quinhydrone and calomel electrodes in acetic acid: Standard potentials of quinhydrone and calomel electrodes in acetic acid. Nevskaya, Yu. A.; Korotkova, P. I.; Sumarokova, T. N. (Inst. Khim. Nauk, Alma-Ata, USSR). Izv. Akad. Nauk Kaz. SSR, Ser. Khim., 27(3), 35-9 (Russian) 1977. CODEN: IKAKAK. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 79 The std. potentials were detd. of quinhydrone [106-34-3] and calomel electrodes, as well as the potential of the satd. calomel electrode in acetic acid [64-19-7]: Equin0 = 0.610 V, EHg,Hg2Cl20 = -0.565 V, EHg,Hg2Cl2satd. = -0.223 V vs. EH(HOAc)0 = 0; Equin0 = 0..831 V, EHg,Hg2Cl20 = -0.344 V, EHg,Hg2Cl2satd. = -0.002 V vs. EH(H2O0 = 0. The quinhydrone and calomel electrodes, as well as the AgCl electrode, can be used in HOAc as ref. electrodes. The quinhydrone electrode is very suitable for comparing the acidity of aq. and HOAc solns.

Effect of some organic substances on the corrosion of titanium alloy VT-1 in sulfuric and hydrochloric acids: Effect of some organic substances on the corrosion of titanium alloy VT-1 in sulfuric and hydrochloric acids. Tupikin, E. I.; Klyuchnikov, N. G.; Nemchaninova, G. L. (USSR). Ingibitory Korroz. Met., 75-8. Edited by: Balezin, S. A. Mosk. Gos. Pedagog. Inst.: Moscow, USSR. (Russian) 1974. CODEN: 35BAAF. DOCUMENT TYPE: Conference CA Section: 56 (Nonferrous Metals and Alloys) Only oxidn. agents such as 2,6-dinitroaniline [606-22-4], 2,4-dinitrophenol [51-28-5], quinhydrone [106-34-3], and condensation products of formaldehyde with nitroanilines were efficient inhibitors of VT-1 [7440-32-6] Ti alloy corrosion in H2SO4 and HCl. Amines, propargyl alc. [107-19-7], and S-contg. org. compds. were mild inhibitors or even stimulated corrosion. After addn. of efficient inhibitors the stationary corrosion potentials were highly pos. The effective inhibitors formed a protective surface oxide layer.