Nitrosyl chloride

  • Nitrogen oxychloride
  • Chlorine nitride oxid
  • Nitrosonium chloride
Formula
NOCl
Structure
Description
A yellow to yellowish red gas.
Uses
Bleaching substance for flour.

Registry Numbers and Inventories.
CAS
2696-92-6
EC (EINECS/ELINCS)
220-273-1
UN (DOT)
1069
Merck
12,6744
Beilstein/Gmelin
130680 (G)
Swiss Giftliste 1
G-5490
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed

Properties.
Formula
ClNO
Formula mass
65.46
Melting point, °C
-62
Boiling point, °C
-5.5
Vapor pressure, mmHg
2180 (25 C)
Vapor density (air=1)
2.3
Critical temperature
168
Critical pressure
90
Density
1.36 g/cm3 (20 C)
Solubility in water
Decomposes
Partition coefficient, pKow
1.07
Heat of vaporization
25.8 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear rubber gloves, face shield and coveralls. Use a full-body shield to prepare for violent reaction possibility.
Respirators
Self-contained breathing apparatus (approved mask may be used for short exposures only); rubberized clothing; gloves; shoes; chemical goggles.
Small spills/leaks
Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Neutralize spilled material with crushed limestone, soda ash, or lime. Do not use water on material itself.
Stability
No data.
Incompatibilities
May react vigorously or explosively
Decomposition
When heated to decomposition, evolve very toxic fumes of hydrogen chloride and nitrogen oxides.

Fire.
Flash Point,°C
-18
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use water spray to knock-down vapors.
Fire potential
Pre-addition of nitrogen oxide (or nitrosyl chloride as its precursor) to stoichiometric hydrogen-oxygen mixt @ 240 mbar360 C will cause immediate ignition under variety of circumstances.
Hazards
Fire will produce irritating, corrosive and/or toxic gases. Vapors from liquefied gas are initially heavier than air and spread along ground. May react violently with water. Containers may explode when heated
Combustion products
Very toxic gases are generated when heated
Health
3

Health.
Poison_Class
1
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.
   Inhalation
Inhalation may produce dyspnea, pleuritic chest pain, upper airway edema, pulmonary edema, hypoxemia, bronchospasm, pneumonitis, and persistent pulmonary function abnormalities. Airway hyperreactivity has also been reported.
   Skin
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
   Eyes
See Skin.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Remove victim to fresh air; call a doctor; enforce complete rest until doctor arrives; observe at least 24 hours for delayed effects.
   Skin
Remove contaminated clothing, wash exposed area with copious amounts of water. A physician should examine the area if irritation or pain persists.
   Eyes
In case of contact with liquefied gas, thaw frosted parts with lukewarm water Immediately flush skin with running water for at least 20 minutes.

Transport.
UN number
1069
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
NTC
 
Std. Transport #
4920509