PARAQUAT METHOSULFATE†

Chemical Identification
Chemical Identification
CAS # 2074-50-2
Formula

C₁₂H₁₄N₂.₂CH₃O₄S

Synonyms

4,4'-bipyridinium, 1,1'-dimethyl-, bis(methyl sulfate); N,N'-dimethyl-4,4'-bipyridinium methosulfate; paraquat dimethosulfate

Physical Properties
Physical Properties
Physical description White crystalline solid or yellow solid.
Boiling point decomposes at 347-356°F Molecular weight 408.48
Freezing point/melting point Vapor pressure approx 0
Flash point Vapor density
Specific gravity 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.) 1982 (respirable dust)
Sampling group
Sampler/Sampling media PTFE filter, 1 µm [SKC 225-2705]
Sampling time*
Sampling volume (TWA)*

40-1000 L

Sampling flow rate (TWA)*

1-4 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments HPLC-UV
Method reference NIOSH 5003 (fully 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.

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

0.5 mg/m³ (resp dust)

REL-TWA

0.1 mg/m³ (resp)

TLV-TWA

0.5 mg/m³, 0.1 mg/m³ (respirable particulate matter) [1979]

PEL-TWA

0.5 mg/m³ (total particulates), 0.1 mg/m³ (respirable sizes)

PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

Y

Skin notation

Y

Skin notation

Y

Skin notation

Y

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:

See footnote [n]

Health factors:  See NIH-NLM PubChem. IDLH

1 mg/m³

Carcinogenic classifications: 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 - Paraquat methosulfate

NIOSH: Pocket Guide to Chemical Hazards - Paraquat (Paraquat dichloride)

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Paraquat [4685-14-7] as the cation. See annual publication for most recent information.
  • Hertzman, C., Wiens, M., Bowering, D., Snow, B. and Caine D.: Parkinson's disease: a case-control study of occupational and environmental risk factors. Am. J. Ind. Med. 17(3): 349-355, 1990.
  • McCormack, A.L., et al.: Environmental risk factors and Parkinson's disease: selective degeneration of nigral dopaminergic neurons caused by the herbicide paraquat. Neurobiol. Dis. 10(2): 119-127, 2002.
  • Pohanish, R.P. (editor): Paraquat. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1784-1787.
  • Ranjbar, A., Pasalar, P., Sedighi, A. and Abdollahi, M.: Induction of oxidative stress in paraquat formulating workers. Toxicol. Lett. 131(3): 191-194, 2002.
  • Suntres, Z.E.: Role of antioxidants in paraquat toxicity. Toxicology 180(1): 65-77, 2002.

Last Updated Date : 01/07/2021