Benzo[b]thiophene

  • Thianaphthene
Formula
C8H6S
Structure
Description
White, crystalline solide with a napthalene-like odor.
Uses
Production of pharmaceuticals, thioindigo.

Registry Numbers and Inventories.
CAS
95-15-8
EC (EINECS/ELINCS)
202-395-7
EC Class
harmful
S 22 36/37
UN (DOT)
3335
Merck
12,9438
Beilstein/Gmelin
80580
Beilstein Reference
5-17-02-00006
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed

Properties.
Formula
C8H6S
Formula mass
134.20
Melting point, °C
28 - 32
Boiling point, °C
221
Vapor pressure, mmHg
0.2 (25 C)
Critical temperature
479
Critical pressure
38.30
Density
1.1932 g/cm3 (10 C)
Solubility in water
Insoluble
Viscosity
2.52 cp (35 C)
Surface tension
42.6 g/s2 (35 C)
Refractive index
1.6374 (37 C)
Partition coefficient, pKow
4.38
Heat of fusion
11.84 kJ/mol
Heat of vaporization
43.9 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container.
Handling
Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing.
Protection
Eyes: Wear chemical goggles. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear a chemical apron.
Respirators
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container.
Stability
No data.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
62
Autoignition, °C
510
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Health.
Exposure effects
Chronic exposure may cause blood effects.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation.
   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. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   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
2934 99 90