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Refrigerants and blowing agents

Difluoromethane

Also known as Methylene difluoride, Methane, difluoro-, Freon 32

CAS 75-10-5Formula CH2F2Molar mass 52.02 g/molEC 200-839-4
GHS signal word: Danger. Pictograms: Flammable, Gas under pressure, Serious health hazard 32 suppliers listed
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Difluoromethane chemical structure, CH2F2, CAS 75-10-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless gas
Melting point
-136.8 °C
Boiling point
-51.6 °C
Density
1.2139 g/cm³ at -52 °C
Solubility
In water, 0.44% at 25 °C
HS code
290342
Category
Refrigerants and blowing agents
UN number
UN 3252
Illustrative photo, a gas cylinder on a trolley on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Difluoromethane?

Plain description, key identifiers and synonyms

Difluoromethane is a member of fluoromethanes. It has a role as a refrigerant.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
difluoromethane
CAS number
75-10-5 CAS number cross-checkedOther or deprecated CAS: 2154-59-8
EC number
200-839-4
Molecular formula
CH2F2
UNII
77JW9K722X
MDL number
MFCD00039283
InChIKey
RWRIWBAIICGTTQ-UHFFFAOYSA-N
InChI
InChI=1S/CH2F2/c2-1-3/h1H2
SMILES (canonical and isomeric)
C(F)F

Synonyms

  • Methylene difluoride
  • Methane, difluoro-
  • Freon 32
  • Genetron 32
  • Carbon fluoride hydride
  • R 32 (refrigerant)
  • Freon-32
  • HFC 32
  • Khladon 32
  • Genetron-32
  • ECOLO ACE-32
  • FC 32
  • Methylene fluoride
  • Difluormethan
  • Difluoro-Methane
  • Difluoromethane, 99.7%
  • Difluoromethane (FC-32)
  • Norflurane EP Impurity Ss
  • Difluoromethane or Refrigerant gas R 32 [UN3252] [Flammable gas]

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 gasexp.
Melting point
-136.8 °Cexp.
Boiling point
-51.6 °Cexp.
Density
1.2139 g/cm³ at -52 °Cexp.
Solubility
In water, 0.44% at 25 °Cexp.
Vapour pressure
1.26 × 10⁺⁴ mm Hg at 25 °Cexp.

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
52.02 g/molcalc.
Exact mass
52.0125 Dacalc.
LogP (octanol/water)
0.88calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS04: Gas under pressure
Gas under pressure
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H220Extremely flammable gas.
  • H221Flammable gas.
  • H280Contains gas under pressure, may explode if heated.
  • H340May cause genetic defects.
  • H350May cause cancer.
Precautionary statements (11)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P377Leaking gas fire: do not extinguish, unless leak can be stopped safely.
  • P381In case of leakage, eliminate all ignition sources.
  • P403Store in a well-ventilated place.
  • P405Store locked up.
  • P410 + P403Protect from sunlight. Store in a well-ventilated place.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3252
Transport hazard class
2.1

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 aid

Difluoromethane suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 32 suppliers
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Where suppliers are based

32 suppliers in 8 countries

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Difluoromethane 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

Field-scale tests were performed to evaluate the effectiveness of the gas-phase partitioning tracer method for in-situ measurement of soil-water content. The tracer tests were conducted before and after a controlled infiltration event to evaluate performance at two water contents. Nonpartitioning (sulfur hexafluoride) and water-partitioning (difluoromethane) tracers were injected into the test zone, and their effluent breakthrough curves were analyzed using the method of moments to calculate retardation factors for difluoromethane. ...

/As a tracer gas in gas chromatography and photoacoustic spectroscopy./.

Refrigeration, organic synthesis.

Industrial uses: Refrigerants.

Consumer uses: Refrigerants.

Roles

  • refrigerant

Functional uses

  • Propellants, non-motive (blowing agents)
  • Refrigerants

How it is made

Higher temperatures and higher hydrogen fluoride-to-substrate ratios are necessary to achieve complete replacement of all chlorine atoms in the starting chloro compounds by fluorine. Both liquid-phase halogen exchange in the presence of catalysts, such as antimony(V) or tin(IV) chlorofluorides and vapor phase reactions using solid-phase catalysts based on chromium are employed. Preferred starting materials are chloroform for HFC 23, dichloromethane for HFC 32, and 1,1,1-trichloroethane for HFC 143a. The conversion of tetrachloroethylene to HFC 125 and trichloroethylene to HFC 134a involves initial HF-addition across the double bond followed by a series of chlorine-fluorine exchange reactions.

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 Difluoromethane is traded under.

HS 2903.42Exact HS code

Difluoromethane (HFC-32)

World exports in 2024
$277M
+34.3% vs 2023, imports $272M
2022 to 2024
Top exporters
  1. China69.2%
  2. India * partner reported5.6%
  3. United Arab Emirates * partner reported5.1%
Top importers
  1. Thailand19.4%
  2. United States10.6%
  3. Brazil9.9%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Difluoromethane is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Difluoromethane, based on the data on this page

What is Difluoromethane?

Difluoromethane is a member of fluoromethanes. It has a role as a refrigerant.

What is the CAS number of Difluoromethane?

The CAS registry number of Difluoromethane is 75-10-5. Other or deprecated CAS numbers: 2154-59-8.

What is the molecular formula and weight of Difluoromethane?

The molecular formula of Difluoromethane is CH2F2 and its molar mass is 52.02 g/mol.

What is Difluoromethane used for?

Field-scale tests were performed to evaluate the effectiveness of the gas-phase partitioning tracer method for in-situ measurement of soil-water content. The tracer tests were conducted before and after a controlled infiltration event to evaluate performance at two water contents.

Is Difluoromethane hazardous?

Difluoromethane carries the GHS signal word "Danger". Main hazards: extremely flammable gas, flammable gas, contains gas under pressure, may explode if heated. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Difluoromethane?

Difluoromethane is usually classified under HS code 290342 (Difluoromethane (HFC-32)). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Difluoromethane?

CompoundList lists 32 suppliers of Difluoromethane in United States, China, India, Japan and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Difluoromethane in India?

5 suppliers in India list Difluoromethane on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Difluoromethane?

Suppliers quote Difluoromethane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Difluoromethane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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