Product Identification

Product Name

1-Propanethiol

Synonyms

1-Propanethiol
3-Mercaptopropane
Propane-1-thiol

CAS

107-03-9

Formula

C3H8S

Molecular Weight

76.16

EINECS

203-455-5

RTECS

TZ7300000

RTECS Class

Primary Irritant

Beilstein/Gmelin

1696860

Beilstein Reference

4-01-00-01449

EC Class

highly flammable, harmful, irritant

Physical and Chemical Properties

Appearance

Colorless liquid with an offensive cabbage-like odor.

Solubility in water

Slightly soluble

Melting Point

-113

Boiling Point

67

Vapor Pressure

155

Density

0.82995 g/cm3

Partition Coefficient

1.7

Heat Of Vaporization

32.1 kJ/mol

Heat Of Combustion

-2829 kJ/mol

Usage

Synthetic flavoring agent.

Saturation Concentration

Approximately 160,550 ppm (16.1%) at 20 C (calculated.)

Vapor Density

2.63

Odor threshold

0.00075 ppm

Refractive Index

1.4380 (20 C)

First Aid Measures

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.

Handling and Storage

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.

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.

Hazards Identification

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.

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.

Hazards

Flashback along vapor trial may occur.

EC Risk Phrase

R 11 22 36/38

EC Safety Phrase

S 9 16

UN (DOT)

2402

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 Effects

Prolonged or repeated exposure may cause nausea, dizziness, and headache. Effects may be delayed.

Exposure limit(s)

NIOSH REL: C 0.5 ppm (1.6 mg/m3) [15-minute]

Poison Class

4

Fire Fighting Measures

Flash Point

-14

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.

Lower exp. limit

1.8

Fire Potential

Very dangerous fire hazard.

Accidental Release Measures

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.

Stability and Reactivity

Disposal Code

6

Incompatibilities

Oxidizing agents, reducing agents, strong acids, strong bases, alkali metals, calcium hypochlorite.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Combustion Products

Toxic sulfur dioxide is generated.

Transport Information

UN Number

2402

Hazard Class

3

Packing Group

II

HS Code

2930 90 70