Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Ethylene mercaptan(540-63-6)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Ethylene mercaptan
Synonyms
2-Mercaptoethanethiol
Dithioethylene glycol
Dithioglycol
Ethane-1,2-dithiol
Ethylenedimercaptan
Ethylenedithiol
CAS
540-63-6
Formula
C2H6S2
Molecular Weight
94.2
EINECS
208-752-3
RTECS
KI3325000
RTECS Class
Other
Merck
13,3760
Beilstein/Gmelin
505946
Beilstein Reference
4-01-00-02450
EC Class
flammable, toxic

Physical and Chemical Properties

Appearance
Colorless liquid, unpleasant disagreeable odor.
Solubility in water
Soluble
Melting Point
-41
Boiling Point
146 - 149
Vapor Pressure
6.5 (25 C)
Density
1.374 g/cm3
pKa/pKb
9.37 (pKa)
Partition Coefficient
1.31
Heat Of Vaporization
37.9 kJ/mol
Usage
Used as a metal chelating agent.
Saturation Concentration
6317 ppm at 20 C (calc.)
Refractive Index
1.5545 (20 C)

First Aid Measures

Ingestion
Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.
Inhalation
Remove from exposure to fresh air immediately.
Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion
Nausea may occur with low concentration exposures.
Inhalation
Decreased respiratory rate was reported in 2 persons. Respiratory depression has occurred in animals following inhalation of high concentrations.
Skin
May irritate or burn. May cause toxic effects if absorbed through the skin.
Eyes
See Skin.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
EC Risk Phrase
R 10 23/24/25
EC Safety Phrase
S 23 36/37 45
UN (DOT)
3336

Exposure Controls/Personal Protection

Personal Protection
Wear appropriate safety goggles, protective clothing and gloves.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Poison Class
4

Fire Fighting Measures

Flash Point
44
Fire Fighting
Wear a self-contained breathing apparatus inpressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Fire Potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

Accidental Release Measures

Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.

Stability and Reactivity

Disposal Code
6
Incompatibilities
Bases - oxidizing agents - reducing agents - alkali metals.
Stability
Stable under normal temperatures and pressures.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.
Combustion Products
Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number
3336
Hazard Class
3
Packing Group
I; II; III
HS Code
2930 90 70
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