Difluoromethane

CAS NO.：75-10-5
Empirical Formula: CH2F2
Molecular Weight: 52.02
MDL number: MFCD00039283
EINECS: 200-839-4
SAFETY DATA SHEET (SDS)
Update Date: 2025-10-29 10:02:07

What is Difluoromethane?

Chemical properties

Difluoromethane is a colorless and flammable gas that has a light ethereal odor with poor warning properties.

The Uses of Difluoromethane

Difluoromethane is use as refrigerant, as an important component in some refrigeration mixtures, and as a reactive ion etching gas in semiconductor materials processing applications.

Definition

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

Preparation

Difluoromethane(HFC-32) is manufactured in closed systems. Possible routes are hydrodechlorination of chlorodifluoromethane (HCFC-22) and hydrofluorination of dichloromethane.

General Description

A colorless odorless gas. Insoluble in water and has a high thermal stability. Its vapors are heavier than air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket. Contact with the unconfined liquid can cause frostbite. Used as a refrigerant.

Air & Water Reactions

Highly flammable. Insoluble in water. Easily ignited by heat, sparks or flames. Forms explosive mixtures with air

Reactivity Profile

Difluoromethane can react with some metals to form dangerous products. May react violently with aluminum. Incompatible with strong oxidizing and reducing agents. Also incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.

Health Hazard

Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases.

Fire Hazard

EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.

Properties of Difluoromethane

Melting point:	−136 °C(lit.)
Boiling point:	−51.6 °C(lit.)
Density	1.1 g/mL at 25 °C(lit.)
refractive index	1.1960
CAS DataBase Reference	75-10-5(CAS DataBase Reference)
NIST Chemistry Reference	Methane, difluoro-(75-10-5)
EPA Substance Registry System	HFC-32 (75-10-5)

Safety information for Difluoromethane

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Gas Cylinder Compressed Gases GHS04 Exclamation Mark Irritant GHS07
GHS Hazard Statements	H220:Flammable gases H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P280:Wear protective gloves/protective clothing/eye protection/face protection.