Difluoromethane
- CAS No.
- 75-10-5
- Chemical Name:
- Difluoromethane
- Synonyms
- R32;CH2F2;HFC-32;1,1-Difluoromethane;METHYLENE FLUORIDE;Carbon fluoride hydride (CF2H2);F32;R 32;CFC32;FC-32
- CBNumber:
- CB6175830
- Molecular Formula:
- CH2F2
- Molecular Weight:
- 52.02
- MOL File:
- 75-10-5.mol
- MSDS File:
- SDS
- Modify Date:
- 2023/1/11 10:46:38
| 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
Risk and Safety Statements
| Symbol(GHS) |    GHS02,GHS07,GHS04 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H220-H315-H319-H335 | |||||||||
| Precautionary statements | P210-P280 | |||||||||
| Hazard Codes | F,F+ | |||||||||
| Risk Statements | 11-12 | |||||||||
| Safety Statements | 9-16-33 | |||||||||
| RIDADR | UN 3252 2.1 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | PA8537500 | |||||||||
| Hazard Note | Flammable | |||||||||
| TSCA | T | |||||||||
| HazardClass | 2.1 | |||||||||
| HS Code | 2903392100 | |||||||||
| Toxicity | LC50 inhalation in mouse: 1810gm/m3 | |||||||||
| NFPA 704 |
|
Difluoromethane Chemical Properties,Uses,Production
Chemical Properties
Difluoromethane is a colorless and flammable gas that has a light ethereal odor with poor warning properties.
Uses
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.
Difluoromethane Preparation Products And Raw materials
Raw materials
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