Dichloromonofluoromethane
- CAS NO.:75-43-4
- Empirical Formula: CHCl2F
- Molecular Weight: 102.92
- MDL number: MFCD00000825
- EINECS: 200-869-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-03-14 15:18:28
What is Dichloromonofluoromethane?
Description
Dichlorofluoro-methane is a heavy, colorlessgas or liquid (below 9℃) with a slight ether-like odor.Molecular weight=102.92; Boiling point=9℃; Freezing/Melting point=2135℃; Relative vapor density (air-5 1)=3.57; Vapor pressure=1.6 atm at 25℃;Autoignition temperature=522℃. Hazard Identification(based on NFPA-704 M Rating System): Health 1,Flammability 0, Reactivity 0. Poor solubility in water;solubility=0.7% at 30℃.
Chemical properties
Dichlorofluoromethane is a heavy, colorless gas or liquid (below 9C) with a slight ethereal odor.
The Uses of Dichloromonofluoromethane
Fire extinguishers; solvent; refrigerant.
The Uses of Dichloromonofluoromethane
Refrigerant gas; propellant gas
General Description
Dichloromonofluoromethane is a colorless, odorless gas. Dichloromonofluoromethane is shipped as a liquid under its own vapor pressure. Contact with the liquid may cause frostbite to unprotected skin. Dichloromonofluoromethane can asphyxiate by displacement of air. Exposure of the container to prolonged heat or fire may cause Dichloromonofluoromethane to rupture violently and rocket.
Air & Water Reactions
Slightly soluble in water.
Reactivity Profile
Dichloromonofluoromethane is incompatible with the following: Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium; acid; acid fumes .
Health Hazard
INHALATION: May cause giddiness, light-headedness, disorientation, nausea, vomiting, narcosis, cardiac dysrhythmias, hypotension, and death. SKIN: May cause frostbite or irritation. EYES: May cause irritation or cold injury.
Fire Hazard
Special Hazards of Combustion Products: Toxic fumes of chlorine and fluorine may be produced in fire.
Safety Profile
Mildly toxic by inhalation. Experimental reproductive effects. When heated to decomposition it emits very toxic fumes of Cl and F-.
Potential Exposure
This material is used as a refrigerant and a propellant gas.
First aid
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. Iffrostbite has occurred, seek medical attention immediately;do NOT rub the affected areas or flush them with water. Inorder to prevent further tissue damage, do NOT attempt toremove frozen clothing from frostbitten areas. If frostbitehas NOT occurred, immediately and thoroughly wash contaminated skin with soap and water.
Environmental Fate
Chemical/Physical. The experimental hydrolysis half-life of dichlorofluoromethane in water at 25 °C and pH 7 is 234 yr (Jeffers and Wolfe, 1996).
storage
Color Code—Green: General storage may be used.Prior to working with dichloromonofluoro-methane you shouldbe trained on its proper handling and storage. Store in tightlyclosed containers in a cool, well-ventilated area away fromchemically active metals, acids, acid fumes, alkali and alkalineearth metals, since violent reaction occur. Procedures for thehandling, use, and storage of cylinders should be in compliance with OSHA 1910.101 and 1910.169, as with the recommendations of the Compressed Gas Association.
Shipping
UN1029 Dichlorofluoromethane or Refrigerant gas R-21 Hazard Class: 2.2; Labels: 2.2-Nonflammable compressed gas. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.
Incompatibilities
Reacts violently with chemically active metals: sodium, potassium, calcium, powdered aluminum; zinc, magnesium, alkali, alkaline earth. Reacts with acids or acid fumes producing highly toxic chlorine and fluorine fumes. Attacks some forms of plastics, rubber, and coatings.
Waste Disposal
Return refillable compressed gas cylinders to supplier. Incineration, preferably after mixing with another combustible fuel. Care must be exercised to assure complete combustion to prevent the formation of phosgene. An acid scrubber is necessary to remove the halo acids produced. Because of recent discovery of potential ozone decomposition in the stratosphere, this material should be released to the atmosphere only as a last resort
Properties of Dichloromonofluoromethane
Melting point: | -135°C |
Boiling point: | 8.9°C |
Density | 1,354 g/cm3 |
vapor pressure | 1,216 at 11.8 °C (NIOSH, 1997) |
refractive index | 1.3540 |
solubility | Soluble in acetic acid, alcohol, and ether (Weast, 1986) |
form | Colorless gas |
color | Colorless liquid or gas with an ether-like odor |
Water Solubility | 0.7 wt % at 30 °C (NIOSH, 1997) |
Exposure limits | NIOSH REL: TWA 10 ppm (40 mg/m3), IDLH 5,000 ppm; OSHA PEL: TWA
1,000 ppm (4,200 mg/m3); ACGIH TLV: TWA 10 ppm (adopted). |
Dielectric constant | 5.3(28℃) |
NIST Chemistry Reference | Methane, dichlorofluoro-(75-43-4) |
EPA Substance Registry System | HCFC-21 (75-43-4) |
Safety information for Dichloromonofluoromethane
Computed Descriptors for Dichloromonofluoromethane
Related products of tetrahydrofuran
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