Cyanogen chloride

  • Chlorine cyanide
  • Chlorocyanide
  • Chlorocyanogen
Formula
CNCl
Structure
Description
A colorless gas or liquid with a strong odor.
Uses
Chemical synthesis, military poison gas.

Registry Numbers and Inventories.
CAS
506-77-4
EC (EINECS/ELINCS)
208-052-8
RTECS
GT2275000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Human Data
UN (DOT)
1589
Merck
12,2764
Beilstein/Gmelin
969190
Beilstein Reference
4-03-00-00090
RCRA
P033
EPA OPP
25801
Swiss Giftliste 1
G-1399
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CClN
Formula mass
61.47
Boiling point, °C
15.5
Vapor pressure, mmHg
1150 (25 C)
Vapor density (air=1)
2
Odor Threshold Odor threshold 2.5 mg/m3
Density
1.222 g/cm3 (0 C)
Solubility in water
250 ml/L
Surface tension
26.53 g/s2 (-31 C)
Refractive index
1.3668 (6.7 C)
Partition coefficient, pKow
0.68
Heat of vaporization
26.80 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 appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Water spill: Add dilute caustic soda (NaOH). Add calcium hypochlorite (Ca(ClO)2). Adjust pH to neutral (pH=7).
Stability
Tends to form polymers on storage.
Incompatibilities
Reacts exothermically with alkenes and alkynes.

Fire.
Flash Point,°C
-38
Upper exp. limit, %
23.5
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, dry chemical or carbon dioxide.
Fire potential
Not flammable.
Hazards
It may only be shipped in cylinders. Prolonged exposure of the cylinder to fire or heat may cause violent rupturing and rocketing.
Combustion products
Poisonous gases are produced when heated in fire.
Health
3

Health.
Exposure limit(s)
TLV: 0.3 ppm; 0.75 mg/m3 (as CEILING) (ACGIH 1992-1993). NIOSH REL: C 0.3 ppm (0.6 mg/m3)
Poison_Class
1
Exposure effects
Initially, headache, vertigo, and agitation occur, followed by combative behavior, coma, seizures, and death.
   Inhalation
Tachypnea, hyperpnea, and dyspnea followed rapidly by respiratory depression are common. Pulmonary edema may occur.
   Skin
Papules, rashes, pruritus, and ulcerations may occur.
   Eyes
Burning sensation of mouth and throat, and equally red retinal arteries and veins are common.

First aid
 
   Ingestion
Emergency measures - in symptomatic patients advance life support including use of the cyanide antidote kit should be initiated as gastrointestinal decontamination is being prepared. Ipecac induced vomiting is not recommended because of the potential for cns depression and seizures. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Oxygen - immediately begin therapy with 100% oxygen.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. While cyanide can be absorbed through intact skin, most reported cases have involved whole-body immersion in cyanide solutions or large-area burns with molten cyanide solutions.
   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
1589
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
CCL
 
Std. Transport #
4920178