Dichlorofluoromethane
Also known as Fluorodichloromethane, Dichloromonofluoromethane, Algofrene type 5
Key facts
What buyers check first
- Appearance
- Colorless heavy gas
- Melting point
- -130.4 °C
- Boiling point
- 8.9 °C
- Density
- 1.405 g/cm³ 9 °C
- Solubility
- In water, 1.88 × 10⁺⁰⁴ mg/L at 25 °C
- HS code
- 290379
- Category
- Refrigerants and blowing agents
- UN number
- UN 1029
What is Dichlorofluoromethane?
Plain description, key identifiers and synonyms
Dichlorofluoromethane is a colorless, odorless gas. It is shipped as a liquid under its own vapor pressure. Contact with the liquid may cause frostbite to unprotected skin. It can asphyxiate by displacement of air. Exposure of the container to prolonged heat or fire may cause it to rupture violently and rocket.
Identifiers
Registry numbers, names and line notations, tap to copy
- IUPAC name
- dichloro(fluoro)methane
- CAS number
- 75-43-4 CAS number cross-checked
- EC number
- 200-869-8
- Molecular formula
- CHCl2F
- UNII
- 7GAO4CRJ0B
- InChIKey
- UMNKXPULIDJLSU-UHFFFAOYSA-N
- InChI
- InChI=1S/CHCl2F/c2-1(3)4/h1H
- SMILES (canonical and isomeric)
- C(F)(Cl)Cl
Synonyms
- Fluorodichloromethane
- Dichloromonofluoromethane
- Algofrene type 5
- Arcton 7
- Genetron 21
- Monofluorodichloromethane
- Refrigerant 21
- HCFC-21
- Methane, dichlorofluoro-
- Fluorocarbon 21
- FREON 21
- Freon F 21
- R 21 (refrigerant)
- Halon 112
- Dwuchlorofluorometan
- Racon 21
- HCFC 21
- FREON-21
- HALON-112
- FC 21
- dichloro(fluoro)methane
- CHCl2F
- Fluorocarbon-21
- CHFCl2
- Dichloro-fluoro-methane
Show all 35 synonymsShow fewer synonyms
- Freon #21
- Refrigerant-21
- Dichlorofluoromethane, 98%
- 4-01-00-00039 (Beilstein Handbook Reference)
- Dichlormonofluoromethane
- Desflurane EP Impurity C
- UN 1029
- Desflurane impurity c
- Dichlorofluoromethane or Refrigerant gas R21
- Dichlorofluoromethane 100 microg/mL in Methanol
Physical and chemical properties
Measured values and descriptors computed from the structure
Physical and chemical properties
Measured values, check the supplier specification for your grade
| Appearance | Colorless heavy gasexp.Measured value |
|---|---|
| Odour | Slight ether-like odorexp.Measured value |
| Melting point | -130.4 °Cexp.Measured value |
| Boiling point | 8.9 °Cexp.Measured value |
| Density | 1.405 g/cm³ 9 °Cexp.Measured value |
| Autoignition temperature | 522 °Cexp.Measured value |
| Solubility | In water, 1.88 × 10⁺⁰⁴ mg/L at 25 °Cexp.Measured value |
| Vapour pressure | 1360 mm Hg at 25 °Cexp.Measured value |
Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.
Computed descriptors
Calculated from the structure, useful for screening and formulation
| Molecular weight | 102.92 g/molcalc.Computed value |
|---|---|
| Exact mass | 101.9439 Dacalc.Computed value |
| LogP (octanol/water) | 1.72calc.Computed value |
| Topological polar surface area | 0 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 0calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 4calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 1calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
| Lipinski rule of five | Passes (0 violations)calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
Hazard statements
- H280Contains gas under pressure, may explode if heated.
- H420Harms public health and the environment by destroying ozone in the upper atmosphere.
Precautionary statements (2)
- P410 + P403Protect from sunlight. Store in a well-ventilated place.
- P502Refer to manufacturer or supplier for information on recovery or recycling.
- UN number
- UN 1029
- Transport hazard class
- 2.2
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
Full safety data and first aidDichlorofluoromethane suppliers
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- Italy, Vezzano Ligure ManufacturerUnclaimed profileDichloromonofluoromethaneGrade, purity and minimum order on requestPrice on request
- China, ChangzhouUnclaimed profileDichlorofluoromethaneGrade, purity and minimum order on requestPrice on request
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Dichlorofluoromethane price
Indicative price range per kg from live supplier offers
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Uses and applications
What the substance is used for, by industry and function
Fully halogenated chlorofluorocarbons (CFCs) such as dichlorofluoromethane were scheduled for production phase-out in 1987 by the Montreal Protocol. Although originally scheduled for 50% production phase-out by the year 2000 in developed countries, the worsening ozone depletion has forced acceleration of the CFC phase-out.
Dichlorofluoromethane (HCFC-21) has much less usage than other chlorofluorocarbons ... however, it has had application as a refrigerant in the aerospace industry, as a solvent, as propellant gas, and as a heat exchange fluid in geothermal energy applications.
Used as a refrigerant, solvent, propellant and heat-exchange fluid.
How it is made
Reaction of chloroform and hydrogen fluoride.
The most important commercial method for manufacturing (chlorofluoro carbons) is the successive replacement of chlorine by fluorine using hydrogen fluoride ... CHCl2F (Freon 21) is produced by reacting chloroform with HF
Regulatory status
Inventories, regulations and trade controls that list this substance
United States
- TSCA inventory (USA)Status: Active in US commerce
HS code and trade data
Customs classification and reported world trade statistics
Global trade
World import and export statistics for the HS code Dichlorofluoromethane is traded under.
Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens not elsewhere…
- China29.6%
- India * partner reported23.2%
- Netherlands18.4%
- United States17.5%
- Netherlands17.3%
- Canada15.3%
* Partner reported figures, a lower bound.
The HS code shown for Dichlorofluoromethane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.
Related chemicals
Parent and salt forms, stereoisomers, similar structures and isomers
Similar structures
Nearest neighbours by Morgan fingerprint Tanimoto similarity
Frequently asked questions
Quick answers about Dichlorofluoromethane, based on the data on this page
What is Dichlorofluoromethane?
What is the CAS number of Dichlorofluoromethane?
What is the molecular formula and weight of Dichlorofluoromethane?
What is Dichlorofluoromethane used for?
Is Dichlorofluoromethane hazardous?
What is the HS code of Dichlorofluoromethane?
Where can I buy Dichlorofluoromethane?
What is the price of Dichlorofluoromethane?
Guides for buyers
Practical guides that help when you source, ship or handle Dichlorofluoromethane
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, SafetyHow to read a safety data sheet in 10 minutesA section by section method to pull the essentials out of any 16 section SDS: identity, hazards, composition, storage, PPE, properties, transport and emergency measures.Read
- Guide, SafetyGHS pictograms, signal words and hazard statements explainedA practical guide to the nine GHS pictograms, the signal words Danger and Warning, H and P statements, and how to read a chemical label in seconds.Read
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