3-Methylindole

  • beta-Methylindole
  • 3-Methyl-1H-indole
  • 3-MI
  • Scatole
  • Skatol
  • Skatole
Formula
C9H9N
Structure
Description
Characteristic fecal odor at high levels. Off-white flakes.
Uses
species- and organ-selective pneumotoxin

Registry Numbers and Inventories.
CAS
83-34-1
EC (EINECS/ELINCS)
201-471-7
S 22 24/25
RTECS
NM0350000
RTECS class
Other
UN (DOT)
3335
Merck
12,8700
Beilstein/Gmelin
111296
Beilstein Reference
5-20-07-00069
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C9H9N
Formula mass
131.18
Melting point, °C
95 - 97
Boiling point, °C
265
Vapor pressure, mmHg
0.006
Density
1.003 g/cm3 (99.6 C)
Solubility in water
0.45 g/L
Refractive index
1.5666 (100 C)

Hazards and Protection.
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.
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.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.
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.

Fire.
Flash Point,°C
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.

Health.
Exposure effects
   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.

First aid
 
   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.

Transport.
UN number
3335
Response guide
HS Code
2933 99 20