DICHLORODIFLUOROMETHANE†
| CAS # | 75-71-8 |
|---|---|
| Formula |
CCl₂F₂ |
| Synonyms |
difluorodichloromethane; Fluorocarbon 12; Freon12; Genetron12; Halon122; Propellant 12; Refrigerant 12 |
| Physical description | Colorless gas with an ether-like odor at extremely high concentrations. | ||
|---|---|---|---|
| Boiling point | -22°F | Molecular weight | 120.9 |
| Freezing point/melting point | -252°F | Vapor pressure | 5.7 atm |
| Flash point | Vapor density | 4.2 | |
| Specific gravity | 1.35 at 59°F | Ionization potential | 11.75 eV |
| Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
| NFPA health rating | NFPA fire rating | ||
| NFPA reactivity rating | NFPA special instruction | ||
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 0871 | ||
|---|---|---|---|
| Sampling group | |||
| Sampler/Sampling media | |||
| Sampling time* | |||
| Sampling volume (TWA)* | |||
| Sampling flow rate (TWA)* | |||
| Sampling volume (STEL/Peak/C)* | |||
| Sampling flow rate (STEL/Peak/C)* | |||
| Analytical method instruments | |||
| Method reference | |||
| Notes | OSHA staff, please contact the SLTC before sampling (801) 233-5100. |
||
| Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
| Wipe Sampler/Sampling media | |
|---|---|
| Bulk Method |
| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
|
Sampling information (see manufacturer instructions) |
|
OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
|||||
|---|---|---|---|---|---|---|---|
| PEL-TWA |
1000 ppm (4950 mg/m³) |
REL-TWA |
1000 ppm (4950 mg/m³) |
TLV-TWA |
1000 ppm [1979] |
PEL-TWA |
1000 ppm (4950 mg/m³) |
| PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
| PEL-C | REL-C | TLV-C | PEL-C |
6200 ppm |
|||
| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
| Notes: | Notes: | Notes: | Notes: | ||||
| Health factors: See NIH-NLM PubChem. | IDLH |
15000 ppm |
|||||
| Carcinogenic classifications: TLV-A4 | Notes: | ||||||
| AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: | |||||||
Additional Resources and Literature References
|
NOAA: CAMEO Chemicals - Dichlorodifluoromethane NIOSH: Pocket Guide to Chemical Hazards - Dichlorodifluoromethane Literature References
|
Last Updated Date : 01/22/2024