Product Identification

Product Name

2-Methylbenzenethiol

Synonyms

2-Methylbenzenethiol
2-Methylthiophenol
o-Toluenethiol

CAS

137-06-4

Formula

C7H8S

Molecular Weight

124.21

EINECS

205-276-8

RTECS

XT8750000

RTECS Class

Other

Merck

12,9461

Beilstein/Gmelin

774068

Beilstein Reference

4-06-00-02014

EC Class

irritant

Physical and Chemical Properties

Appearance

White to yellowish moist crystals, musty odor.

Solubility in water

Insoluble

Melting Point

4.5

Boiling Point

195

Vapor Pressure

0.6 (25 C)

Density

1.041 g/cm3 (20 C)

pKa/pKb

6.64 (pKa)

Partition Coefficient

2.98

Heat Of Vaporization

41.4 kJ/mol

Usage

Antiseptic, dermatologic unspecified isomer.

Saturation Concentration

860 ppm at 25 C (calc.)

Odor threshold

1.0X10-4 mg/L

Refractive Index

1.57 (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

Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Get medical aid 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. If irritation develops, get medical aid.

Handling and Storage

Storage

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Use only in a well ventilated area. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Inhalation

Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.

Skin

Causes skin irritation. The toxicological properties of this material have not been fully investigated.

Eyes

Causes eye irritation. The toxicological properties of this material have not been fully investigated.

Ingestion

The toxicological properties of this substance have not been fully investigated. Causes gastrointestinal tract irritation.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 20/21/22 36/38

EC Safety Phrase

S 26 36/37/39

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 and clothing to prevent skin exposure. Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Exposure Effects

Shock with a weak irregular pulse, abnormally low blood pressure, shallow respirations, reduced body temperature and respiratory failure may occur. CNS depression and brain damage may occur. Although o-cresol is not a confirmed human reproductive hazard at the present time, female enamel-wire workers exposed to cresol and other substances experienced excessive menstrual bleeding, gynecological disorders and increased birth defects. There is speculation that methemoglobinemia may be especially harmful to the fetus.

Fire Fighting Measures

Flash Point

63

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. Use water spray to keep fire-exposed containers cool. Combustible Liquid. Containers may explode when heated. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Use agent most appropriate to extinguish fire.

Fire Potential

Combustible material: may burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.

Stability and Reactivity

Disposal Code

6

Incompatibilities

Oxidizing agents

Stability

Stable under normal temperatures and pressures.

Decomposition

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

Combustion Products

When heated to decomp, it emits toxic fumes of sulfur oxides.

Transport Information

UN Number

2810

Hazard Class

6.1

Packing Group

I; II; III

HS Code

2930 90 70