106-34-3

Name	Quinhydrone
CAS	106-34-3
EINECS(EC#)	203-387-6
Molecular Formula	C12H10O4
MDL Number	MFCD00010310
Molecular Weight	218.21
MOL File	106-34-3.mol

Synonyms

2,5-CYCLOHEXADIENE-1,4-DIONE CMPD WITH 1,4-BENZENEDIOL GREEN HYDROQUINONE HYDROQUINONE HYDROQUINONE:BENZOQUINONE 1:1 COMPLEX QUINHYDRONE 2,5-Cyclohexadiene-1,4-dione, compd. with 1,4-benzenediol (1:1) 2,5-Cyclohexadiene-1,4-dione,compd.with1,4-benzenediol(1:1) 2,5-cyclohexadiene-1,4-dionecompd.with1,4-benzenediol(1:1) beta-Quinhydrone Chinhydron Hydroquinone, compd. with p-benzoquinone hydroquinone,compd.withp-benzoquinone p-Benzoquinhydrone p-Benzoquinone, compd. with hydroquinone p-Benzoquinone, compd. with hydroquinone (1:1) p-benzoquinone,compd.withhydroquinone(1:1) p-Benzoquinone-hydroquinone compound (1:1) Quinhydrone 2,5-Cyclohexadiene-1,4-dionecompdwith1,4-benzenediol(1:1) Greenhydroquinone BALSAM CANADA, FILTERED FOR MICROSCOPY QUINHYDRONE 98+% FOR ANALYTICAL PURPOSE

Chemical Properties

Appearance	green crystalline powder
Melting point	167-172 °C (lit.)
Boiling point	285 °C
density	1.32
refractive index	1.4270 (estimate)
storage temp.	Store below +30°C.
solubility	4g/l
form	Crystalline Powder
color	Dark green
Specific Gravity	0.863 (20/4℃)
Stability:	Stable. Incompatible with strong oxidizing agents.
Water Solubility	4 g/L (20 ºC)
Sensitive	Light Sensitive
Merck	14,8058
BRN	3919222
LogP	0.644 (est)
CAS DataBase Reference	106-34-3(CAS DataBase Reference)
NIST Chemistry Reference	Quinhydrone(106-34-3)
EPA Substance Registry System	106-34-3(EPA Substance)

Safety Data

Hazard Codes	Xn,N
Risk Statements	R22:Harmful if swallowed. R36/37/38:Irritating to eyes, respiratory system and skin . R50:Very Toxic to aquatic organisms. less more
Safety Statements	S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S36:Wear suitable protective clothing . S61:Avoid release to the environment. Refer to special instructions safety data sheet . S37/39:Wear suitable gloves and eye/face protection . S29:Do not empty into drains . less more
RIDADR	UN 2811 6.1/PG 3
WGK Germany	3
RTECS	VA4550000
TSCA	Yes
HazardClass	6.1
PackingGroup	III
HS Code	29146990
Toxicity	LD50 orally in rats: 225 mg/kg (Woodward) less more

Raw materials And Preparation Products

Hazard Information

Hazard

Toxic by ingestion.

Chemical Properties

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.

Uses

In pH determinations (quinhydrone electrode).

Uses

Quinhydrone is a hydrogen bonded 1:1 charge transfer complex of hydroquinone and p-benzo-quinone having semiconducting properties.
Quinhydrone is addition compound of one mol hydroquinone and one mol Benzoquinone.
Quinhydrone electrode is a type of redox electrode which can be used to measure the hydrogen ion concentration (pH) of a solution in a chemical experiment.
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.

Uses

Used to measure the hydrogen ion concentration (pH) of a solution in a chemical experiment. It provides an alternative to the commonly used glass electrode in a pH meter.

Definition

ChEBI: Quinhydrone is an addition compound. It contains a 1,4-benzoquinone and a hydroquinone.

General Description

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.

Purification Methods

Crystallise quinhydrone from H2O at 65o , then dry it in vacuo.[Beilstein 7 H 617, 7 IV 2069.]

Spectrum Detail

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