IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 354.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 20 ,1979,p. 477.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; NCI Carcinogenesis Bioassay (gavage); Clear Evidence: mouse NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-27 ,1978. ; Some Evidence: rat NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-27 ,1978. . Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program. Community Right-To-Know List.

OSHA PEL: TWA 1 ppm (skin)
ACGIH TLV: TWA 1 ppm (skin); Animal Carcinogen
DFG MAK: 1 ppm (7 mg/m³); Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (1,1,2,2-Tetrachlorethane) Reduce to lowest level

For occupational chemical analysis use NIOSH: 1,1,2,2-Tetrachloroethane, 1019.

The 1,1,2,2-Tetrachloroethane , with the CAS register number 79-34-5, could also be called as (CHCl2)2;1,1,2,2,-tetrachlor-ethane ; 1,1,2,2-Czterochloroetan ; 1,1,2,2-czterochloroetan(polish) ; 1,1,2,2-tce ; 1,1,2,2-Tetrachloorethaan ; 1,1,2,2-Tetrachloraethan ; 1,1,2,2-Tetrachlorethan .

The physical properties of this chemcial are as followings: (1)ACD/LogP:  2.17 ; (2)ACD/LogD (pH 5.5):  2.17  ; (3)ACD/LogD (pH 7.4):  2.17  ; (4)ACD/BCF (pH 5.5):  26.37  ; (5)ACD/BCF (pH 7.4):  26.37  ; (6)ACD/KOC (pH 5.5):  362.07  ; (7)ACD/KOC (pH 7.4):  362.07  ; (8)#Freely Rotating Bonds:  1; (9)Index of Refraction:  1.479  ; (10)Molar Refractivity:  30.62 cm³  ; (11)Molar Volume:  107.8 cm³  ; (12)Polarizability:  12.14 ×10^-24 cm³  ; (13)Surface Tension:  33.9 dyne/cm  ; (14)Density:  1.556 g/cm³  ; (15)Flash Point:  42.6 °C  ; (16)Enthalpy of Vaporization:  37.64 kJ/mol  ; (17)Boiling Point:  142 °C at 760 mmHg  ; (18)Vapour Pressure:  7.14 mmHg at 25°C.

This is a kind of colorless liquid and is complete soluble in Methanol, ethanol, ethyl ether, chloroform, benzene, carbon tetrachloride, carbon bisulfide, petroleum ether, DMF and other oils but insoluble in water. And it could volatilize with steam. Besides, it is incompatible with strong oxidizing agents, strong bases and can react violently with sodium, potassium, nitrates, 2,4-dinitrophenyl disulphide. As for its usage, it could be used as solvent and analytical reagent and it could also be as the metal detergent, pesticide, and other phytocide.

As for its product categories, there are vairous, including Intermediates of Dyes and Pigments; refrigerants; Organics; Analytical Chemistry; Standard Solution of Volatile Organic Compounds for Water & Soil Analysis; Standard Solutions (VOC); Alpha Sort; Chemical Class; ChloroPesticides; FumigantsVolatiles/ Semivolatiles; Halogenated; Insecticides; TA - TE; T-ZAlphabetic.

Being a kind of very toxic chemical, it may at very low levels cause damage to health and it is dangerous when by inhalation or in contact with skin, and it has the danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. Besides, it is dangerous for the environment, for it may present an immediate or delayed danger to one or more components of the environment and it is toxic to the aquatic organisms and may cause long-term adverse effects in the aquatic environment. Besides, it is dangerous for the ozone layer. Except all these, it is a kind of highly flammable chemical, as it may catch fire in contact with air, only needing brief contact with an ignition source and it has a very low flash point or evolve highly flammable gases in contact with water.
 
Because of these dangerous possibilities, you should be very cautious while dealing with it. Wear suitable protective clothing and gloves. If in case of insufficient ventilation, wear suitable respiratory equipment and if in case of accident or if you feel unwell seek medical advice immediately (show the label where possible). Besides, Avoid releasing to the environment and refer to special instructions/safety data sheet. Yuo could obtain more safety information from WGK Germany  3. When store it, it should be kept in the ventilating dry and cool storeroom, and away from those oxygenant and other food additives.

When it comes to its preparation products, there are including chloroacetic acid, trichloroethylene, thiophosgene, hexachloroethane, 4-vinylbenzyl chloride, decabromodiphenyl oxide, pentachloroethane. And its raw materials are including ferric chloride, antimony(v) chloride.

Additionally, you could convert the following data information into the molecular structure:
SMILES:ClC(Cl)C(Cl)Cl
InChI:InChI=1/C2H2Cl4/c3-1(4)2(5)6/h1-2H
InChIKey:QPFMBZIOSGYJDE-UHFFFAOYAH

Below are the toxicity information of this chemical:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
cat	LCLo	inhalation	19gm/m3/45M (19000mg/m3)	SENSE ORGANS AND SPECIAL SENSES: LACRIMATION: EYE BEHAVIORAL: GENERAL ANESTHETIC GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS	Archiv fuer Hygiene und Bakteriologie. Vol. 116, Pg. 131, 1936.
dog	LDLo	intravenous	50mg/kg (50mg/kg)		Quarterly Journal of Pharmacy & Pharmacology. Vol. 7, Pg. 205, 1934.
dog	LDLo	oral	300mg/kg (300mg/kg)	LIVER: "HEPATITIS (HEPATOCELLULAR NECROSIS), ZONAL" BEHAVIORAL: SLEEP LIVER: FATTY LIVER DEGERATION	American Journal of Hygiene. Vol. 16, Pg. 325, 1932.
guinea pig	LDLo	intraperitoneal	500mg/kg (500mg/kg)	LIVER: FATTY LIVER DEGERATION	American Industrial Hygiene Association Journal. Vol. 35, Pg. 21, 1974.
human	TCLo	inhalation	1000mg/m3/30M (1000mg/m3)	BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: "HALLUCINATIONS, DISTORTED PERCEPTIONS"	Archiv fuer Hygiene und Bakteriologie. Vol. 116, Pg. 131, 1936.
human	TDLo	oral	30mg/kg (30mg/kg)	BEHAVIORAL: GENERAL ANESTHETIC	Pesticide Chemicals Official Compendium, Association of the American Pesticide Control Officials, Inc., 1966. Vol. -, Pg. 1110, 1966.
mouse	LC50	inhalation	4500mg/m3/2H (4500mg/m3)		"Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 107, 1982.
mouse	LD50	intraperitoneal	821mg/kg (821mg/kg)		Sangyo Igaku. Japanese Journal of Industrial Health. Vol. 8, Pg. 371, 1966.
mouse	LD50	subcutaneous	1108mg/kg (1108mg/kg)	BEHAVIORAL: SLEEP BEHAVIORAL: ATAXIA	Journal of Pharmacology and Experimental Therapeutics. Vol. 123, Pg. 224, 1958.
rabbit	LDLo	subcutaneous	500mg/kg (500mg/kg)		Quarterly Journal of Pharmacy & Pharmacology. Vol. 7, Pg. 205, 1934.
rat	LCLo	inhalation	1000ppm/4H (1000ppm)		Journal of Industrial Hygiene and Toxicology. Vol. 31, Pg. 343, 1949.
rat	LD50	oral	200mg/kg (200mg/kg)		Industrial Health. Vol. 32, Pg. 145, 1994.