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  • Name 1,1,1,2-Tetrachloro-2,2-difluoroethane
  • EINECS200-934-0
  • CAS No. 76-11-9
  • Density1.726 g/cm3
  • PSA0.00000
  • LogP3.18820
  • SolubilityN/A
  • Melting Point39-44 °C
  • FormulaC2Cl4F2
  • Boiling Point93.3 °C at 760 mmHg
  • Molecular Weight203.831
  • Flash Point11.8 °C
  • Transport InformationN/A
  • Appearancecolorless crystalline solid
  • SafetyS59; S37/39; S26
  • Risk CodesR59; R36/37/38
  • Molecular Structure
    Molecular Structure of 76-11-9 (1,1,1,2-Tetrachlorodifluoroethane)
  • Hazard SymbolsDangerousN IrritantXi
  • SynonymsDangerousN IrritantXi
  • Article Data42

1,1,1,2-Tetrachloro-2,2-difluoroethane Chemical Properties

Molecular Structure of 1,1,1,2-Tetrachloro-2,2-difluoroethane (CAS NO.76-11-9):

IUPAC Name: 1,1,1,2-Tetrachloro-2,2-difluoroethane 
Empirical Formula: C2Cl4F2
Molecular Weight: 203.8302
H bond acceptors: 0
H bond donors: 0
Freely Rotating Bonds: 0
Polar Surface Area: 0 Å2
Index of Refraction: 1.437
Molar Refractivity: 30.97 cm3
Molar Volume: 118 cm3
Surface Tension: 29.2 dyne/cm
Density: 1.726 g/cm3
Flash Point: 11.8 °C
Enthalpy of Vaporization: 31.92 kJ/mol
Boiling Point: 93.3 °C at 760 mmHg
Vapour Pressure: 56.7 mmHg at 25°C
Storage temp: Refrigerator(+4°C)
EINECS: 200-934-0
Melting Point: 39-44 °C
Product Categories: CFC; refrigerants
Apperance: colorless solid with a slight, ether-like odor

1,1,1,2-Tetrachloro-2,2-difluoroethane Production

Join anhydrous aluminum chloride into the melting Freon 112 quickly when stirring for 2-3h, then heated to 60-70 ℃, heat filter, filtrate fractionation, collecting 91-92 ℃ distillate,get 2,2 - difluoro-tetrachloroethane. Yield is 70%.

1,1,1,2-Tetrachloro-2,2-difluoroethane Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LCLo inhalation 20000ppm/30M (20000ppm) BEHAVIORAL: GENERAL ANESTHETIC


Toxicology and Applied Pharmacology. Vol. 19, Pg. 1, 1971.
rat LD50 oral > 8gm/kg (8000mg/kg)   Nature. Vol. 210, Pg. 744, 1966.

1,1,1,2-Tetrachloro-2,2-difluoroethane Consensus Reports

Reported in EPA TSCA Inventory.

1,1,1,2-Tetrachloro-2,2-difluoroethane Safety Profile

Mildly toxic by inhalation. When heated to decomposition it emits very toxic fumes of Cl and F. Used as a refrigerant. See also Fluorides.Safety information of 1,1,1,2-Tetrachloro-2,2-difluoroethane (CAS NO.76-11-9):
Hazard Codes:  DangerousN,IrritantXi
Risk Statements 
59 Dangerous for the ozone layer
36/37/38 Irritating to eyes, respiratory system and skin
Safety Statements 
59 Refer to manufacturer/supplier for information on recovery/recycling
37/39 Wear suitable gloves and eye/face protection
26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice

1,1,1,2-Tetrachloro-2,2-difluoroethane Standards and Recommendations

OSHA PEL: TWA 500 ppm
ACGIH TLV: TWA 500 ppm
DFG MAK: 1000 ppm (8500 mg/m3)
NIOSH REL: (1,1,1,2-Tetrachloro-2,2-difluoroethane) TWA 500 ppm

1,1,1,2-Tetrachloro-2,2-difluoroethane Specification

 1,1,1,2-Tetrachloro-2,2-difluoroethane , with CAS number of 76-11-9, can be called 1,1,1,2-Tetrachloro-2,2-difluoroethane ; 1,1-Difluoro-1,2,2,2-tetrachloroethane ; 1,1-Difluoroperchloroethane ; 1,2,2,2-Tetrachloro-1,1-difluoroethane ; Ethane,1,1,1,2-tetrachloro-2,2-difluoro- ; 2,2-Difluoro-1,1,1,2-tetrachloroethane . It is a colorless crystalline solid, incompatible with active metals such as potassium, sodium, beryllium, powdered aluminum, zinc, magnesium and calcium. Reacts with acids. 1,1,1,2-Tetrachloro-2,2-difluoroethane (CAS NO.76-11-9) is used as intermediate for methoxyflurane of anesthetics.

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