Propyl mercaptan

  • 1-Propanethiol
  • 3-Mercaptopropane
  • Propane-1-thiol
Formula
CH3CH2CH2SH
Structure
Description
Colorless liquid with an offensive cabbage-like odor.
Uses
Synthetic flavoring agent.

Registry Numbers and Inventories.
CAS
107-03-9
EC (EINECS/ELINCS)
203-455-5
EC Class
highly flammable, harmful, irritant
R 11 22 36/38
RTECS
TZ7300000
RTECS class
Primary Irritant
UN (DOT)
2402
Beilstein/Gmelin
1696860
Beilstein Reference
4-01-00-01449
Swiss Giftliste 1
G-2813
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H8S
Formula mass
76.16
Melting point, °C
-113
Boiling point, °C
67
Vapor pressure, mmHg
155
Vapor density (air=1)
2.63
Saturation Concentration
Approximately 160,550 ppm (16.1%) at 20 C (calculated.)
Evaporization number
Probably rapid. No specific information available.
Odor Threshold Odor threshold 0.00075 ppm
Critical temperature
257
Critical pressure
45.4
Density
0.82995 g/cm3
Solubility in water
Slightly soluble
Viscosity
0.41 cp (20 C)
Surface tension
24.7 g/s2
Refractive index
1.4380 (20 C)
Partition coefficient, pKow
1.70
Heat of fusion
5.5 kJ/mol
Heat of vaporization
32.1 kJ/mol
Heat of combustion
-2829 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Flammables-area. Store in a cool, dry area away from incompatible substances.
B2 D2B
Handling
Wash thoroughly after handling. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Do not get on skin and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Use only in a chemical fume hood. This product may be under pressure; cool before opening. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Remove all sources of ignition. Use a spark-proof tool. A vapor suppressing foam may be used to reduce vapors.
Disposal code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, reducing agents, strong acids, strong bases, alkali metals, calcium hypochlorite.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
-14
Lower exp. limit, %
1.8
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. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide. Water may be ineffective. Do NOT use straight streams of water.
Fire potential
Very dangerous fire hazard.
Hazards
Flashback along vapor trial may occur.
Combustion products
Toxic sulfur dioxide is generated.
Health
2
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 0.5 ppm (1.6 mg/m3) [15-minute]
Poison_Class
4
Exposure effects
Prolonged or repeated exposure may cause nausea, dizziness, and headache. Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Ingestion of large amounts may cause CNS depression. May be harmful if swallowed. May cause muscle weakness, convulsions, and respiratory paralysis.
   Inhalation
May cause cyanosis, characterized by bluish-colored skin. May cause respiratory tract irritation. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest.
   Skin
Causes severe skin irritation. May cause contact dermatitis. May cause cyanosis of the extremities.
   Eyes
Causes severe eye irritation. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. 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 breathing is difficult, give oxygen. Get medical aid. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
2402
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
PMN
 
HS Code
2930 90 70
 
Std. Transport #
4908160