METHYL DEMETON

Chemical Identification
Chemical Identification
CAS # 8022-00-2
Formula
 
 

C₆H₁₅O₃PS₂

Synonyms
 
 

demeton methyl; O,O-dimethyl 2-ethylmercaptoethyl thiophosphate; metasystox; methyl mercaptophos; methyl systox

Physical Properties
Physical Properties
Physical description Oily, colorless to pale-yellow liquid with an unpleasant odor.
Boiling point decomposes Molecular weight 230.3
Freezing point/melting point Vapor pressure 0.0004 mmHg
Flash point Vapor density
Specific gravity 1.20 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
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
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
 
 

 

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 Method
Wipe Method
Sampler/Sampling media
 
 

 

Bulk Method
Bulk Method
 
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
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
 
 

 

REL-TWA
 
 

0.5 mg/m³

TLV-TWA
 
 

0.05 mg/m³ (inhalable fraction and vapor) [2006]

PEL-TWA
 
 

0.05 mg/m³

PEL-STEL
 
 

 

REL-STEL
 
 

 

TLV-STEL
 
 

 

PEL-STEL
 
 

 

PEL-C
 
 

 

REL-C
 
 

 

TLV-C
 
 

 

PEL-C
 
 

 

Skin notation
 
 

NA

Skin notation
 
 

Y

Skin notation
 
 

Y

Skin notation
 
 

Y

Notes:
 
 

Not established

Notes:
 
 

 

Notes:
 
 

BEI®

Notes:
 
 

 

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Not listed Notes:
 
 

 

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

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Methyl demeton

NIOSH: Pocket Guide to Chemical Hazards - Methyl demeton

Literature References

 
 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methyl demeton. See annual publication for most recent information.

Last Updated Date : 01/05/2021