Benzothiazole

  • O-2857
  • benzosulfonazole
  • FEMA number 3256
  • 1-Thia-3-azaindene
  • USAF ek-4812
  • Vangard BT
Formula
C7H5NS
Structure
Description
Clear yellow liquid, odor similar to quinoline.
Uses
Flavoring substance or adjuvant.

Registry Numbers and Inventories.
CAS
95-16-9
EC (EINECS/ELINCS)
202-396-2
EC Class
harmful
R 21/22
S 28 36/37
RTECS
DL0875000
RTECS class
Primary Irritant
UN (DOT)
2810
Merck
13,1108
Beilstein/Gmelin
109468
Beilstein Reference
4-27-00-01069
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H5NS
Formula mass
135.19
Melting point, °C
1 - 3
Boiling point, °C
231
Vapor pressure, mmHg
0.12 (25 C)
Vapor density (air=1)
4.66
Saturation Concentration
4.5% at 131 C (calculated)
Density
1.246 g/cm3 (20 C)
Solubility in water
slightly soluble
Refractive index
1.6379 (20 C)
pKa/pKb
11.56 (pKb)
Partition coefficient, pKow
2.01
Heat of vaporization
44.5 kJ/mol
Heat of combustion
-4215 kJ/mol

Hazards and Protection.
Storage
Keep away from heat and flame. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from water.
Handling
Wash thoroughly after handling. Do not allow water to get into the container because of violent reaction. Do not get on skin or in eyes. Do not ingest or inhale. Do not allow contact with water. Use only in a chemical fume hood. Keep from contact with moist air and steam.
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 respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Wash area with soap and water. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation. Do not expose spill to water.
Disposal code
1
Stability
Stable under normal temperatures and pressures. Combines vigorously or explosively with water. Volatile in steam.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen cyanide, nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
97
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. May ignite or explode on contact with steam or moist air. Extinguishing media: Use dry sand or earth to smother fire. Use agent most appropriate to extinguish fire. DO NOT USE WATER! Contact professional fire-fighters immediately. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
2
 

Health.
Exposure effects
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Inhalation of vapor may cause respiratory tract irritation.
   Skin
Causes mild skin irritation. May be absorbed through the skin in harmful amounts.
   Eyes
Causes mild 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 immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   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
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2810
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
HS Code
2934 20 80