CCl2F2
ceramic· JVASP-5185· CCl2F2
CCl2F2 (difluorodichloromethane, CFC-12) is a halogenated hydrocarbon compound historically classified and used as a refrigerant and aerosol propellant. While this material is now largely phased out under the Montreal Protocol due to ozone-depletion potential, it remains relevant in legacy equipment maintenance, historical documentation, and specialized low-temperature applications where alternatives are impractical or unavailable. Engineers encounter CCl2F2 primarily when servicing or decommissioning older air-conditioning, refrigeration, and foam-blowing systems, where understanding its properties is essential for safe handling and environmental compliance.
refrigeration systems (legacy)HVAC maintenance and recoveryaerosol propellants (discontinued)foam blowing agents (historical)cryogenic applicationsCFC phase-out compliance
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.07652 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 5.732 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 3.635 | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.1812 | C/m² | — | ||
Seebeck Coefficient(S) | -369.7 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.9394 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.