Methane,dichlorodifluoro-

Dichlorodifluoromethane is reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

OSHA PEL: TWA 1000 ppm
ACGIH TLV: TWA 1000 ppm; Not Classifiable as a Human Carcinogen
DFG MAK: 1000 ppm (5000 mg/m³)
DOT Classification:  2.2; Label: Nonflammable Gas

For occupational chemical analysis use NIOSH: Dichlorodifluoromethane and 1,2-Dichlorotetrafluoroethane, 1018.

The Dichlorodifluoromethane with CAS registry number of 75-71-8 is also known as Methane,dichlorodifluoro-. The IUPAC name and product name are the same. It belongs to product categories of CFC; Refrigerants; Organics; DIA-DICChemical Class; Alpha Sort; D; DAlphabetic; Fluoro; Halogenated; Volatiles/ Semivolatiles. Its EINECS registry number is 200-893-9. In addition, the formula is CCl₂F₂ and the molecular weight is 120.91.

Physical properties about Dichlorodifluoromethane are: (1)ACD/LogP: 2.19; (2)ACD/LogD (pH 5.5): 2.19; (3)ACD/LogD (pH 7.4): 2.19; (4)ACD/BCF (pH 5.5): 27.09; (5)ACD/BCF (pH 7.4): 27.09; (6)ACD/KOC (pH 5.5): 369.15; (7)ACD/KOC (pH 7.4): 369.15; (8)Index of Refraction: 1.343; (9)Molar Refractivity: 16.67 cm³; (10)Molar Volume: 78.7 cm³; (11)Polarizability: 6.6×10^-24cm³; (12)Surface Tension: 18.3 dyne/cm; (13)Density: 1.535 g/cm³; (14)Enthalpy of Vaporization: 21.48 kJ/mol.

Preparation of Dichlorodifluoromethane: it is prepared by reaction of carbon tetrachloride with hydro fluoride. The reaction needs catalyst antimony pentachloride at the temperature of -5 °C.

Uses of Dichlorodifluoromethane: it can be used as refrigerant, fire extinguishing agent, pesticide and spray. It is used to produce trifluormethyl-dibrom-methylenimin by reaction with bis-trifluoromethyl-amine. The reaction occurs with reagent BBr₃ at 100 °C for 16 hours. The yield is about 93%.

When you are using this chemical, please be cautious about it. As a chemical, it is highly flammable and dangerous for the ozone layer. What's more, it is danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed. During using it, wear suitable protective clothing and gloves. Avoid contact with skin and eyes and do not breathe gas/fumes/vapour/spray. Keep container tightly closed  and away from sources of ignition. This material and its container must be disposed of as hazardous waste. In case of accident or if you feel unwell seek medical advice immediately.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: C(F)(F)(Cl)Cl
2. InChI: InChI=1S/CCl2F2/c2-1(3,4)5
3. InChIKey: PXBRQCKWGAHEHS-UHFFFAOYSA-N

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
guinea pig	LC50	inhalation	80pph/30M (800000ppm)		European Journal of Toxicology and Environmental Hygiene. Vol. 9, Pg. 385, 1976.
human	TCLo	inhalation	200000ppm/30M (200000ppm)	SENSE ORGANS AND SPECIAL SENSES: CONJUNCTIVE IRRITATION: EYE LUNGS, THORAX, OR RESPIRATION: FIBROSING ALVEOLITIS LIVER: OTHER CHANGES	European Journal of Toxicology and Environmental Hygiene. Vol. 9, Pg. 385, 1976.
mouse	LC50	inhalation	3348gm/m3/3H (3348000mg/m3)	BEHAVIORAL: SLEEP BEHAVIORAL: EXCITEMENT BEHAVIORAL: TREMOR	Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 28(6), Pg. 95, 1963.
rabbit	LC50	inhalation	80pph/30M (800000ppm)		European Journal of Toxicology and Environmental Hygiene. Vol. 9, Pg. 385, 1976.
rat	LC	inhalation	> 80pph/4H (800000ppm)		National Technical Information Service. Vol. OTS0520424,
rat	LD	oral	> 5600ug/kg (5.6mg/kg)		Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 52(3), Pg. 73, 1987.