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Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon with the formula CHCl 2 F. It is a colorless and odorless gas. It is a colorless and odorless gas. It is produced by fluorination of chloroform using a catalyst such as antimony trifluoride : [ 4 ]
Dichlorodifluoromethane (R-12) is a colorless gas popularly known by the genericized brand name Freon (as Freon-12).It is a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant.
2,2-Dichloro-1,1,1-trifluoroethane or HCFC-123 is considered as an alternative to CFC-11 in low pressure refrigeration and HVAC systems, and should not be used in foam blowing processes or solvent applications.
Its crystal structure is monoclinic with space group P2 1 and lattice constants a = 6.7676, b = 4.1477, c = 5.0206 (0.10 −1 nm), β = 108.205°. [ 3 ] At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).
Bands used for smart watches and fitness trackers contain a synthetic rubber made with PFAS — also known as “forever chemicals” — and researchers are warning that these may be absorbed ...
A new Clean Label Project report suggests some protein powders contain heavy metals lead and cadmium. See which ones are safe here, plus what an expert advises.
Move over, Wordle, Connections and Mini Crossword—there's a new NYT word game in town! The New York Times' recent game, "Strands," is becoming more and more popular as another daily activity ...
Trichlorofluoromethane was first widely used as a refrigerant.Because of its high boiling point compared to most refrigerants, it can be used in systems with a low operating pressure, making the mechanical design of such systems less demanding than that of higher-pressure refrigerants R-12 or R-22.