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Cas Database

Name	Tetrachlorohydroquinone	EINECS	201-779-1
CAS No.	87-87-6	Density	1.848 g/cm³
PSA	40.46000	LogP	3.71140
Solubility	21.5mg/L(temperature not stated)	Melting Point	238-240ºC
Formula	C6H2 Cl4 O2	Boiling Point	286.2 ºC
Molecular Weight	247.893	Flash Point	126.9ºC
Transport Information	N/A	Appearance	tan-coloured or yellowish powder
Safety	Poison by ingestion and intraperitoneal routes. Mutation data reported. When heated to decomposition it emits toxic fumes of Cl⁻.	Risk Codes	22-41
Molecular Structure		Hazard Symbols	Xn
Synonyms	Hydroquinone,tetrachloro- (6CI,7CI,8CI); 2,3,5,6-Tetrachloro-1,4-benzenediol;2,3,5,6-Tetrachloro-1,4-dihydroxybenzene; 2,3,5,6-Tetrachlorohydroquinone;Dihydro-p-chloranil; NSC 100888; NSC 4858; Nordrosophilin A;Perchlorohydroquinone; Tetrachloro-1,4-benzenediol;Tetrachloro-1,4-hydroquinone; Tetrachloro-p-benzohydroquinone;Tetrachloro-p-hydroquinone; Tetrachlorobenzoquinol	Article Data	123

Tetrachlorohydroquinone Chemical Properties

Molecular Structure of Tetrachlorohydroquinone (CAS NO.87-87-6):

EINECS: 201-779-1
IUPAC Name: 2,3,5,6-Tetrachlorobenzene-1,4-diol
Molecular Formula: C₆H₂Cl₄O₂
Molecular Weight: 247.890880 g/mol
XLogP3: 4.1
H-Bond Donor: 2
H-Bond Acceptor: 2
Canonical SMILES: C1(=C(C(=C(C(=C1Cl)Cl)O)Cl)Cl)O
InChI: InChI=1S/C6H2Cl4O2/c7-1-2(8)6(12)4(10)3(9)5(1)11/h11-12H
InChIKey: STOSPPMGXZPHKP-UHFFFAOYSA-N
Index of Refraction: 1.661
Molar Refractivity: 49.59 cm³
Molar Volume: 134 cm³
Surface Tension: 65 dyne/cm
Density: 1.848 g/cm³
Flash Point: 126.9 °C
Enthalpy of Vaporization: 54.63 kJ/mol
Boiling Point: 286.2 °C at 760 mmHg
Vapour Pressure: 0.00156 mmHg at 25 °C
Melting Point: 238-240 °C
Water Solubility: 76.23 mg/L at 25 °C
BRN: 1876374

Tetrachlorohydroquinone Toxicity Data With Reference

1.	dnd-omi 100 µmol/L	MUREAV Mutation Research. 145 (1985),71.
2.	dnd-mam:lym 50 mmol/L	MUREAV Mutation Research. 145 (1985),71.
3.	orl-mus LD50:368 mg/kg	TECSDY Toxicological and Environmental Chemistry. 11 (1986),37.
4.	ipr-mus LD50:25 mg/kg	NTIS** National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD277-689 .

Tetrachlorohydroquinone Consensus Reports

Reported in EPA TSCA Inventory.

Tetrachlorohydroquinone Safety Profile

Safety Information of Tetrachlorohydroquinone (CAS NO.87-87-6):
Hazard Codes: Xn Harmful
Risk Statements: 22-41
R22:Harmful if swallowed
R41:Risk of serious damage to the eyes
Safety Statements: 26-36/37/39-39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection
S39:Wear eye / face protection
RTECS: MX7700000
Poison by ingestion and intraperitoneal routes. Mutation data reported. When heated to decomposition it emits toxic fumes of Cl⁻.

Tetrachlorohydroquinone Specification

Tetrachlorohydroquinone with CAS registry number of 87-87-6 is beige to orange crystals, known as 2,3,5,6-Tetrachloro-1,4-benzenediol ; 2,3,5,6-Tetrachlorohydroquinone ; 4-06-00-05775 (Beilstein Handbook Reference) ; AI3-15490 ; CCRIS 4143 ; Dihydro-p-chloranil ; NSC 100888 ; Nordrosophilin A ; Perchlorohydroquinone ; Tetrachloro p-hydroquinone ; Tetrachloro-p-benzohydroquinone ; Tetrachloro-p-hydroquinone ; Tetrachlorobenzoquinol ; USAF DO-62 ; 1,4-Benzenediol, 2,3,5,6-tetrachloro- ; Hydroquinone, tetrachloro- . When heated to decomposition, it emits irritating and toxic fumes and gases.

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