METHYLENE CHLORIDE (DICHLOROMETHANE)‡
| Chemical Identification | |
|---|---|
| CAS # | 75-09-2 |
| Formula |
CH₂Cl₂ |
| Synonyms |
dichloromethane; methylene dichloride |
| Physical Properties | |||
|---|---|---|---|
| Physical description | Colorless liquid with a chloroform-like odor. | ||
| Boiling point | 104°F | Molecular weight | 84.9 |
| Freezing point/melting point | -139°F | Vapor pressure | 350 mmHg |
| Flash point | Vapor density | 2.93 | |
| Specific gravity | 1.33 | Ionization potential | 11.32 eV |
| Lower explosive limit (LEL) | 13% | Upper explosive limit (UEL) | 23% |
| NFPA health rating | 2 | NFPA fire rating | 1 |
| NFPA reactivity rating | 0 | NFPA special instruction | |
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Monitoring Methods Used by OSHA | ||||||
|---|---|---|---|---|---|---|
| Analyte code (IMIS no.) | 1730 | |||||
| Sampling group | ||||||
| Sampler/Sampling media | ORBO™ 91 Carbosieve® S-III (130/65) [Supelco 20360] | |||||
| Sampling time* |
60 min |
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| Sampling volume (TWA)* |
3 L |
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| Sampling flow rate (TWA)* |
0.05 L/min |
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| Sampling volume (STEL/Peak/C)* |
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| Sampling flow rate (STEL/Peak/C)* |
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| Analytical method instruments | GC-FID | |||||
| Method reference | OSHA 80 (fully validated) | |||||
| Notes |
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| Special requirements |
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* 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 Method | |
|---|---|
| Sampler/Sampling media |
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| Bulk Method |
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| On-Site Screening Techniques | ||||||
|---|---|---|---|---|---|---|
| Device | CMS Chip | |||||
| Model/Type | Methylene chloride, 10-200 ppm range | |||||
|
Sampling information (see manufacturer instructions) |
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| Exposure Limits | |||||||
|---|---|---|---|---|---|---|---|
|
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 |
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| PEL-TWA |
25 ppm [12.5 ppm Action Level] |
REL-TWA |
|
TLV-TWA |
50 ppm [1997] |
PEL-TWA |
25 ppm (87 mg/m³) |
| PEL-STEL |
125 ppm |
REL-STEL |
|
TLV-STEL |
|
PEL-STEL |
125 ppm (435 mg/m³) |
| PEL-C |
|
REL-C |
|
TLV-C |
|
PEL-C |
|
| Skin notation |
Y |
Skin notation |
Y |
Skin notation |
N |
Skin notation |
N |
|
Notes:
See 29 CFR 1910.1052 |
Notes:
CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. |
Notes:
BEI® |
Notes:
See also Section 5202. |
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| Health factors: See NIH-NLM PubChem. | IDLH |
2300 ppm |
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| Carcinogenic classifications: IARC-2B, NIOSH-Ca, EPA-B2, NTP-R, OSHA-Ca, TLV-A3 |
Notes:
Ca |
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|
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
300 ppm/750 ppm/4000 ppm |
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| Additional Resources and Literature References |
|---|
|
NOAA: CAMEO Chemicals - Dicholoromethane NIOSH: Pocket Guide to Chemical Hazards - Methylene chloride Literature References
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Last Updated Date : 04/17/2023