Dichlorodifluoromethane mixture

Dichlorodifluoromethane Mixture, with not more than 12% ethylene oxide... 

Chlorofluorocarbon-blown foam blocks are used to insulate the walls and roofs of some buildings, thus reducing heat losses and helping to conserve fossil fuels. In this area, polyurethane foam competes with polystyrene foam, which until recently was blown with dichlorodifluoromethane (CFC 12) but is now blown with a mixture of chlorodifluoromethane (HCFC 22) and 1 -chloro-l,l-difluoroethane (HCFC 142b). 

The formed mixture is composed of trichlorofluoromethane (Freon-11) and dichlorodifluoromethane (Freon-12). These compounds are used as aerosols and as refrigerants. Due to the depleting effect of chlorofluorocarbons (CFCs) on the ozone layer, the production of these compounds may be reduced appreciably. 

Crimp the valve and pressurize with the mixture of dichlorodifluoromethane and dichlorotet-rafluoromethane, 4.118 g per container. 

Salmeterol xinafoate inhalation aerosol contains salmeterol xinafoate as the racemic form of the 1-hydroxyl-naphthoic acid salt of salmeterol. It is a pressurized, metered-dose aerosol unit for oral inhalation. It contains a microcrystalline suspension of salmeterol xinafoate in a mixture of two chlorofluorocarbon propellants (trichlorofluoromethane and dichlorodifluoromethane)... 

Halogenated Hydrocarbons. A few halogenated hydrocarbons were studied by the usual procedure, using mixtures in air over the platinum filament. Neither dichlorodifluoromethane (CC12F2) nor 1,1-dichloro-ethene yielded a measurable ion current at temperatures up to 900°C. 1,1,1-Trichloroethane yielded a modest ion current, but the results were erratic and not reproducible. There was some indication that the halogen compounds changed the behavior of the filament. Consequently, no further experiments with halogenated compounds were conducted. This erratic behavior was in contrast with the very reproducible results with hydrocarbons. 

Dichlorodifluoromethane and Trichlorofluoromethane.60 In a flask connected to an ice-cooled reflux condenser, a mixture of 2 moles of carbon tetrachloride and 1 mole of antimony trifluoride is cooled to 0°. After addition of 0.1 mole of antimony pentachloride, the mixture is allowed to warm until the reaction starts. The reaction is regulated by intermittent cooling and heating in order not to overtax the reflux condenser. The uncondensed vapors are led to a receiver cooled with solid carbon dioxide. The distillate is a mixture of CCl3F(b.p. 25°) and CCl2F2(b.p. —30°) whose composition depends on the efficiency of the dephlegmation but is usually 50-50 in a laboratory operation. At the... 

SYNS DICHLORODIFLUOROMETHANE and DIFLUOROETHANE AZEOTROPIC MIXTURE (DOT) FREON 500 R500 pOT) UCON 500/HALOCARBON 500... 

Dichlorodifluoromethane is used as an aerosol propellant in metered-dose inhaler (MDI) formulations, either as the sole propellant or in combination with dichlorotetrafluoroethane, trichloromonofluoromethane, or mixtures of these chlorofluorocarbons. Dichlorodifluoromethane may also be used as a propellant in an aerosolized sterile talc used for intrapleural administration and is also used alone in some MDIs containing a steroid. 

In aerosol vehicles that include water, the addition of polyoxyl 40 hydrogenated castor oil improves the solubility of the propellant in the aqueous phase. This enhancement applies both to dichlorodifluoromethane and to propane/butane mixtures. 

Frothing was conducted by the co-use of dichlorodifluoromethane, in which the mixing ratio was 2.2 parts of crude MDl per 1.0 part of the solution. The equivalent ratio of NCO/OH was 5.6 and the weight ratio of crude MDI/polyol was 0.14. The frothing mixture was poured into a 100 mm thick panel. The physical properties of the resulting foam were as follows overall density, 0.047 g/cm core density, 0.042 g/cm compressive strength in the direction of foam rise, 2.2 kg/cm the same in the perpendicular direction, 1.6 kg/cm closed-cell percent, 93.8 thermal conductivity, 0.015 kcal/mh C (71). 

TC Shipping Name Dichlorodifluoromethane and difluoroethane azeotropic mixture TC Classification 2.2 (Non-flammable gas)... 

Dichlorodifluoromethane and Chloro-dilluoromethane Mixture Dichlorodimethyl her. symmetrical 1078 12 Dicyclopentadiene 2,2-Di(4,4-Di-ten-Buiylperoxycyclo- 2048 2168 26 48... 

LIGHTER REFILLS, cigarettes, containing (lammable gas 1078 12 DICHLORODIFLUOROMETHANE and DIFLUOROETHANE MIXTURE... 

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