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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2-Butanethiol(513-53-1)

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
2-Butanethiol
Synonyms
2-Butanethiol
2-Butyl mercaptan
2-Mercaptobutane
sec-Butanethiol
sec-Butyl thioalcohol
sec-Butyl thiol
CAS
513-53-1
Formula
C4H10S
Molecular Weight
90.19
EINECS
208-165-2
Merck
12,1612
Beilstein/Gmelin
1718766
Beilstein Reference
4-01-00-01584
EC Class
highly flammable

Physical and Chemical Properties

Appearance
Colorless liquid, obnoxious, heavy skunk-like odor.
Solubility in water
Slightly soluble
Melting Point
-165
Boiling Point
85
Vapor Pressure
74 (25 C)
Density
0.8290 g/cm3 (20 C)
pKa/pKb
10.69 (pKa)
Partition Coefficient
2.13
Heat Of Vaporization
86.6 kJ/mol
Usage
Odorant for natural gas.
Vapor Density
3.11
Refractive Index
1.4338 (20 C)

First Aid Measures

Ingestion
Seek medical assistance.
Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
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

Inhalation
Pulmonary edema was seen in animals near lethal concentrations.
Skin
May irritate or burn. May cause toxic effects if absorbed through the skin.
Eyes
See Skin.
Ingestion
Nausea and vomiting have been reported in humans due to the refractory odor.
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 11
EC Safety Phrase
S 9 16
UN (DOT)
2347

Exposure Controls/Personal Protection

Personal Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Exposure Effects
Narcosis and paralysis may be caused with concentrated vapors. Drowsiness, weakness, and mild depression may be seen at exposures of 50 to 500 ppm for one hour.
Poison Class
4

Fire Fighting Measures

Flash Point
-23
Fire Fighting
Use of water spray when fighting fire may be inefficient. Small Fires: Dry chemical, carbon dioxide, water spray or regular foam. Large Fires: Water spray, fog or regular foam. Do not use straight streams.
Upper exp. limit
9.6
Lower exp. limit
1.7
Fire Potential
In general, mercaptans are flammable substances.

Accidental Release Measures

Small spills/leaks
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.

Stability and Reactivity

Disposal Code
6
Stability
No data.
Combustion Products
Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number
2347
Hazard Class
3
Packing Group
II
HS Code
2930 90 70
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