Benzenesulfonyl chloride

  • Benzenesulfonic acid chloride
  • Benzene sulfonechloride
Formula
C6H5ClO2S
Structure
Description
Colorless, oily liquid.
Uses
Chemical intermediate for benzene sulfonamides, thiophenol, glybuzole (hypoglycemic agent), n-2-chloroethyl amides, benzonitrile, for its esters-useful as insecticides, miticides, for fenson acaricide (former use).

Registry Numbers and Inventories.
CAS
98-09-9
EC (EINECS/ELINCS)
202-636-6
EC Class
harmful, corrosive
R 22 23/24 34 42/43
S 23 26 36/37/39 45
RTECS
DB8750000
RTECS class
Other
UN (DOT)
2225
Merck
13,1072
Beilstein/Gmelin
606926
Beilstein Reference
4-11-00-00049
RCRA
U020
Swiss Giftliste 1
G-5666
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H5ClO2S
Formula mass
176.62
Melting point, °C
15
Boiling point, °C
251
Vapor pressure, mmHg
0.03 (25 C)
Vapor density (air=1)
1.384
Density
1.3842 g/cm3 (20 C)
Solubility in water
Insoluble
Surface tension
40.66 g/s2 (40 C)
Refractive index
1.5472 (20 C)
Partition coefficient, pKow
1.99
Heat of vaporization
46.9 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a cool, dry place. Do not store in direct sunlight. Store in a tightly closed container. Keep from contact with oxidizing materials. Corrosives area. Water free area.
Handling
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Use caution when opening. Can explode without warning when caps of old containers are unscrewed. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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. Wear an impervious apron. Clothing: Wear appropriate protective clothing to prevent skin exposure. Wear an impervious apron.
Respirators
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
Large spills may be neutralized with dilute alkaline solutions of soda ash, or lime. Absorb the liquid and scrub the area with detergent and water. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors.
Disposal code
11
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents, strong bases, dimethyl sulfoxide, methyl formamide, and water or moisture.
Decomposition
Hydrogen chloride, chlorine, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
105
Autoignition, °C
450
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Containers may explode in the heat of a fire. May react exothermically with water, causing liberation of heat and possible spattering of material. Contact with metals may evolve flammable hydrogen gas. Combustible material; may burn but does not ignite readily. Extinguishing media: Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. Do NOT use straight streams of water. Most foams will react with the material and release corrosive/toxic gases. Cool containers with flooding quantities of water until well after fire is out. For small fires, use dry chemical, dry sand, alcohol-resistant foam.
Fire potential
Not combustible.
Hazards
Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas.
Combustion products
May contain highly toxic and irritating hydrogen chloride and oxides of chlorine and sulfur.
Health
3
 
Flammability
1
 
 
Reactivity
1
 

Health.
Poison_Class
3
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May be harmful if swallowed.
   Inhalation
Causes chemical burns to the respiratory tract. May cause pulmonary edema and severe respiratory disturbances.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. 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
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2225
Response guide
Hazard class
8
Packing Group
III
 
USCG CHRIS Code
BSC
 
HS Code
2904 90 20
 
Std. Transport #
4932322
 
IMO Chemical Code
17
IMO Pollution Category
D
IMO Hazard code
S