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Methyl demeton																				Related Pages
Synonyms & Trade Names
			Demeton methyl, O,O-Dimethyl 2-ethylmercaptoethyl thiophosphate, Metasystox®, Methyl mercaptophos, Methyl systox®
CAS No.
			8022-00-2
	RTECS No.
			TG1760000
	DOT ID & Guide

FormulaC6H15O3PS2
	Conversion
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELTWA 0.5 mg/m3 [skin]
					OSHA PEL none See Appendix G
	Measurement Methods
			None available 
					
					See: NMAM or OSHA Methods
										
Physical Description
			Oily, colorless to pale-yellow liquid with an unpleasant odor.
					[insecticide] [Note: Technical grade consists of 2 isomers: thiono & thiolo.]													
										
Molecular Weight230.3	
	Boiling PointDecomposes
	Freezing Point?
	Solubility0.03-0.3%
	Vapor Pressure0.0004 mmHg
	Ionization Potential?											
Specific Gravity1.20	
	Flash Point?
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Liquid
Incompatibilities & Reactivities
			Strong oxidizers, alkalis, water
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin; ache eyes, rhinorrhea (discharge of thin nasal mucus); nausea, headache, dizziness, vomiting
Target Organs
			Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0862

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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