Dichlorofluoromethane

Dichlorofluoromethane
Names
	Preferred IUPAC name Dichloro(fluoro)methane
	Other names Dichlorofluoromethane; Fluorodichloromethane; Monofluorodichloromethane; Dichloromonofluoromethane; Freon 21; Refrigerant 21; R 21; HCFC 21; Algofrene Type 5; Arcton 7; Halon 112; UN 1029; Genetron 21
Identifiers
CAS Number	75-43-4 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL116813 ;
ChemSpider	6130 ;
ECHA InfoCard	100.000.791
EC Number	200-869-8;
PubChem CID	6370;
RTECS number	PA8400000;
UNII	7GAO4CRJ0B ;
UN number	1029
CompTox Dashboard (EPA)	DTXSID7052498 ;
	InChI InChI=1S/CHCl2F/c2-1(3)4/h1H Key: UMNKXPULIDJLSU-UHFFFAOYSA-N ; InChI=1/CHCl2F/c2-1(3)4/h1H Key: UMNKXPULIDJLSU-UHFFFAOYAU;
	SMILES ClC(Cl)F;
Properties
Chemical formula	CHCl2F
Molar mass	102.92 g/mol
Appearance	Colorless gas
Odor	Ether-like
Density	1.405 kg/m3 at 9 °C; 1.366 kg/m3 at 25 °C;
Melting point	−135 °C (−211 °F; 138 K)
Boiling point	8.92 °C (48.06 °F; 282.07 K)
Solubility in water	9.420 g/L at 30 °C
log P	1.55
Vapor pressure	160 kPa
Henry's law; constant (kH)	0.19 (mol·kg·bar)−1
Magnetic susceptibility (χ)	−48.8·10−6 cm3/mol
Thermal conductivity	0.0086 W/m·K (300 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H280, H420
Precautionary statements	P410+P403, P502
Flash point	Non-flammable
Autoignition; temperature	522 °C (972 °F; 795 K)
	Lethal dose or concentration (LD, LC):
LC50 (median concentration)	>800,000 mg/m3 (mouse, 2 hr); 49,900 ppm (rat, 4 hr);
LCLo (lowest published)	100,000 ppm (guinea pig, <1 hr); 100,000 ppm (mouse, <1 hr);
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1000 ppm (4200 mg/m3)
REL (Recommended)	TWA 10 ppm (40 mg/m3)
IDLH (Immediate danger)	5000 ppm
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon with the formula CHCl₂F. It is a colorless and odorless gas. It is produced by fluorination of chloroform using a catalyst such as antimony trifluoride:^[4]

CHCl₃ + HF → CHCl₂F + HCl

^ ^a ^b ^c ^d ^e NIOSH Pocket Guide to Chemical Hazards. "#0197". National Institute for Occupational Safety and Health (NIOSH).
^ Touloukian, Y.S., Liley, P.E., and Saxena, S.C. Thermophysical properties of matter - the TPRC data series. Volume 3. Thermal conductivity - nonmetallic liquids and gases. Data book. 1970.
^ ^a ^b "Dichloromonofluoromethane". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).

[PGCH-1] NIOSH Pocket Guide to Chemical Hazards. "#0197". National Institute for Occupational Safety and Health (NIOSH).

[2] Touloukian, Y.S., Liley, P.E., and Saxena, S.C. Thermophysical properties of matter - the TPRC data series. Volume 3. Thermal conductivity - nonmetallic liquids and gases. Data book. 1970.

[IDLH-3] "Dichloromonofluoromethane". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).

[Ullmann-4] Cite error: The named reference Ullmann was invoked but never defined (see the help page).

[1]

[2]

[3]

[4]

Names

Preferred IUPAC name Dichloro(fluoro)methane
Other names Dichlorofluoromethane Fluorodichloromethane Monofluorodichloromethane Dichloromonofluoromethane Freon 21 Refrigerant 21 R 21 HCFC 21 Algofrene Type 5 Arcton 7 Halon 112 UN 1029 Genetron 21
Identifiers
CAS Number	75-43-4^Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL116813^Y
ChemSpider	6130^Y
ECHA InfoCard	100.000.791
EC Number	200-869-8
PubChem CID	6370
RTECS number	PA8400000
UNII	7GAO4CRJ0B^Y
UN number	1029
CompTox Dashboard (EPA)	DTXSID7052498
InChI InChI=1S/CHCl2F/c2-1(3)4/h1H^Y Key: UMNKXPULIDJLSU-UHFFFAOYSA-N^Y InChI=1/CHCl2F/c2-1(3)4/h1H Key: UMNKXPULIDJLSU-UHFFFAOYAU
SMILES ClC(Cl)F
Properties
Chemical formula	CHCl₂F
Molar mass	102.92 g/mol
Appearance	Colorless gas
Odor	Ether-like^[1]
Density	1.405 kg/m³ at 9 °C 1.366 kg/m³ at 25 °C
Melting point	−135 °C (−211 °F; 138 K)
Boiling point	8.92 °C (48.06 °F; 282.07 K)
Solubility in water	9.420 g/L at 30 °C
log P	1.55
Vapor pressure	160 kPa
Henry's law constant (k_H)	0.19 (mol·kg·bar)⁻¹
Magnetic susceptibility (χ)	−48.8·10⁻⁶ cm³/mol
Thermal conductivity	0.0086 W/m·K (300 K)^[2]
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H280, H420
Precautionary statements	P410+P403, P502
Flash point	Non-flammable^[1]
Autoignition temperature	522 °C (972 °F; 795 K)
Lethal dose or concentration (LD, LC):
LC₅₀ (median concentration)	>800,000 mg/m³ (mouse, 2 hr) 49,900 ppm (rat, 4 hr)^[3]
LC_Lo (lowest published)	100,000 ppm (guinea pig, <1 hr) 100,000 ppm (mouse, <1 hr)^[3]
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1000 ppm (4200 mg/m³)^[1]
REL (Recommended)	TWA 10 ppm (40 mg/m³)^[1]
IDLH (Immediate danger)	5000 ppm^[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references