4-Chlorobenzenesulfonyl isocyanate

  • 4-Chlorophenylsulfonyl isocyanate
  • p-Chlorobenzenesulfonyl isocyanate
  • Isocyanic acid, anhydride with p-chlorobenzenesulfonic acid
  • Benzenesulfonic acid, p-chloro-, anhydride with isocyanic acid
Formula
C7H4ClNO3S
Structure
Description
Colorless liquid.

Registry Numbers and Inventories.
CAS
5769-15-3
R 20/22 34 42
S 23 26 36/37/39 45
UN (DOT)
2206
Beilstein/Gmelin
516520

Properties.
Formula
C7H4ClNO3S
Formula mass
217.62
Boiling point, °C
78 - 79 (0.005 torr)
Density
1.45 g/cm3
Solubility in water
Insoluble
Refractive index
1.56 (20 C)

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Protection
Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool.
Stability
No data.
Incompatibilities
Strong oxidizing agents, amines.
Decomposition
Hydrogen chloride, nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
49
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.

Health.
Exposure effects
   Ingestion
Harmful if swallowed. Causes gastrointestinal tract burns. The toxicological properties of this substance have not been fully investigated.
   Inhalation
Harmful if inhaled. May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Harmful if absorbed through the skin. Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. 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. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2206
Response guide