METHOXYCHLOR†
| Chemical Identification | |
|---|---|
| CAS # | 72-43-5 |
| Formula |
C₁₆H₁₅Cl₃O₂ |
| Synonyms |
p,p'-dimethoxydiphenylftrichloroethane; DMDT; methoxy-DDT; 2,2-bis(p-methoxyphenyl)-1,1,1-trichloroethane; 1,1,1-trichloro-2,2-bis-(p-methoxyphenyl)ethane |
| Physical Properties | |||
|---|---|---|---|
| Physical description | Colorless to light-yellow crystals with a slight, fruity odor. | ||
| Boiling point | decomposes | Molecular weight | 345.7 |
| Freezing point/melting point | 171°F | Vapor pressure | Very low |
| Flash point | Vapor density | 12 | |
| Specific gravity | 1.41 | Ionization potential | |
| 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 | |||
| Monitoring Methods Used by OSHA | ||||||
|---|---|---|---|---|---|---|
| Analyte code (IMIS no.) | 1646 | |||||
| Sampling group | ||||||
| Sampler/Sampling media | OSHA versatile sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg) with GFF enclosed [SKC 226-30-16] | |||||
| Sampling time* |
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| Sampling volume (TWA)* |
60 L |
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| Sampling flow rate (TWA)* |
1 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-ECD | |||||
| Method reference | OSHA PV2038 (partially 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 |
|---|
|
Limit the amount of bulk submitted to 1 g or 1 mL. |
| On-Site Screening Techniques | ||||||
|---|---|---|---|---|---|---|
| Device | ||||||
| Model/Type | ||||||
|
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 |
15 mg/m³ (total dust) |
REL-TWA |
|
TLV-TWA |
10 mg/m³ [1992] |
PEL-TWA |
10 mg/m³ |
| PEL-STEL |
|
REL-STEL |
|
TLV-STEL |
|
PEL-STEL |
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| PEL-C |
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REL-C |
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TLV-C |
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PEL-C |
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| Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
| Notes: |
Notes:
CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. (LOQ 0.07 mg/m³) See Appendix A, NIOSH Potential Occupational Carcinogens. |
Notes:
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Notes:
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| Health factors: See NIH-NLM PubChem. | IDLH |
5000 mg/m³ |
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| Carcinogenic classifications: IARC-3, NIOSH-Ca, TLV-A4, EPA-D |
Notes:
Ca |
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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| Additional Resources and Literature References |
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|
NOAA: CAMEO Chemicals - Methoxyclor NIOSH: Pocket Guide to Chemical Hazards - Methoxyclor Literature References
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Last Updated Date : 01/05/2021