Cetyl mercaptan(2917-26-2)
Physical and Chemical Properties
Appearance
Colorless liquid, strong odor.
Solubility in water
Insoluble
Melting Point
18 - 20
Boiling Point
335
Vapor Pressure
0.0002 (25 C)
Density
0.8556 g/cm3 (20 C)
pKa/pKb
10.57 (pKa)
Partition Coefficient
8.69
Heat Of Vaporization
55.5 kJ/mol
Usage
Used as a polymerization conditioner; intermediate in organic synthesis; used in tarnish-preventing agents.
Vapor Density
8.9
Refractive Index
1.4630 (20 C)
First Aid Measures
Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Handling and Storage
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use only in a chemical fume hood.
Hazards Identification
Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated. May cause nausea and vomiting.
Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. May cause nausea, dizziness, and headache.
Skin
May cause skin irritation.
Eyes
May cause eye irritation.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
EC Safety Phrase
S 24/25
UN (DOT)
2810
Exposure Controls/Personal Protection
Personal Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Exposure limit(s)
NIOSH REL: C 0.5 ppm (5.3 mg/m3) 15-minute
Poison Class
4
Fire Fighting Measures
Flash Point
99
Autoignition
260
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide. Water may be ineffective. Use agent most appropriate to extinguish fire.
Fire Potential
Combustible material: may burn but does not ignite readily.
Stability and Reactivity
Disposal Code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids, strong bases, oxidizing agents, reducing agents, alkali metals.
Decomposition
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, hydrogen sulfide.
Combustion Products
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
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