Label abbreviations descriptions

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*
 

 
Sampling volume (TWA)*
 

60 L
Sampling flow rate (TWA)*
 

1 L/min
Sampling volume (STEL/Peak/C)*
 
 

 
Sampling flow rate (STEL/Peak/C)*
 
 

 
Analytical method instruments GC-ECD
Method reference OSHA PV2038 (partially validated)
Notes
 
 

 
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
 
 

 
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)

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
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
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
 
 

 
PEL-C
 
 

 

 REL-C
 
 

 

 TLV-C
 
 

 

 PEL-C
 
 

 
Skin notation
 
 

N

 Skin notation
 
 

N

 Skin notation
 
 

N

 Skin notation
 
 

N
Notes:
 
 

See 29 CFR 1910.1000 Table Z-1.

 Notes:
 
 

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. (LOQ 0.07 mg/m³) See Appendix A, NIOSH Potential Occupational Carcinogens.

 Notes:
 
 

 

 Notes:
 
 

 
Health factors:  See NIH-NLM PubChem. IDLH
 
 

5000 mg/m³
Carcinogenic classifications: IARC-3, NIOSH-Ca, TLV-A4, EPA-D Notes:
 
 

Ca
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 
 

 

Additional Resources and Literature References

Last Updated Date : 01/05/2021