Product Identification

Product Name

3-Methyl-1H-indole

Synonyms

3-Methyl-1H-indole
3-MI
beta-Methylindole
Scatole
Skatol
Skatole

CAS

83-34-1

Formula

C9H9N

Molecular Weight

131.18

EINECS

201-471-7

RTECS

NM0350000

RTECS Class

Other

Merck

12,8700

Beilstein/Gmelin

111296

Beilstein Reference

5-20-07-00069

Physical and Chemical Properties

Appearance

Characteristic fecal odor at high levels. Off-white flakes.

Solubility in water

0.45 g/L

Melting Point

95 - 97

Boiling Point

265

Vapor Pressure

.006

Density

1.003 g/cm3 (99.6 C)

Usage

Species- and organ-selective pneumotoxin.

Refractive Index

1.5666 (100 C)

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.

Inhalation

Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.

Skin

Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.

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 breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Keep container tightly closed. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.

Inhalation

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

Skin

May cause skin irritation.

Eyes

May cause eye irritation.

EC Safety Phrase

S 22 24/25

UN (DOT)

3335

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 NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149. 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.

Fire Fighting Measures

Flash Point

132

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use water spray, dry chemical, or carbon dioxide.

Fire Potential

Flammable.

Accidental Release Measures

Small spills/leaks

Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

Stability and Reactivity

Disposal Code

3

Stability

Stable under normal shipping and handling conditions. Substance undergoes color change upon exposure to light and air.

Incompatibilities

Strong oxidizing agents, acids, acid chlorides, acid anhydrides..

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.

Transport Information

UN Number

3335

HS Code

2933 99 20