Product Identification
【Product Name】3-Methyl-1H-indole
【Synonyms】Scatole；3-甲基吲哚
【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℃)
【Usage】Species- and organ-selective pneumotoxin.
【Refractive Index】1.5666 (100℃)

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 ggles 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 underes 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