Calcium cyanide

  • Cyanogas
  • Calcyanide
  • Calcyan
Formula
Ca(CN)2
Structure
Description
White crystals or powder or gray-black powder (technical grade).
Uses
Rodenticide

Registry Numbers and Inventories.
CAS
592-01-8
EC (EINECS/ELINCS)
209-740-0
EC Index Number
020-002-00-5
EC Class
Very toxic; Contact with acids liberates very toxic gas; Dangerous for the Environment
RTECS
EW0700000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
1575
Merck
12,1704
Beilstein/Gmelin
3926685
Beilstein Reference
3-02-00-00061
RCRA
P021
EPA OPP
74001
Swiss Giftliste 1
G-1348
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed

Properties.
Formula
C2CaN2
Formula mass
92.11
Decomposition point, °C
>350
Density
1.853 g/cm3 (20 C)
Solubility in water
Decomposes

Hazards and Protection.
Storage
Protect against physical damage. Store at in cool, dry place. Separate from other storage and protect from moisture, water, acids and oxidizing materials.
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. Use water spray to knock-down vapors. Do not use water on material itself. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Add dilute caustic soda (NaOH). Add calcium hypochlorite (Ca(ClO)2). Adjust pH to neutral (pH=7).
Stability
Stable.
Incompatibilities
Incompatible with isocyanates, nitrides, and peroxides May react rapidly with oxidizing agents.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use foam, dry chemical, or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors.
Fire potential
Nonflammable. Noncombustible itself, but contact with moisture or acids releases flammable toxic hydrogen cyanide gas. Moderate hazard.
Hazards
Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air. Contact with metals may evolve flammable hydrogen gas.
Combustion products
Decomposes in fire to give very toxic gases, including hydrogen cyanide.
Health
3
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
TLV (as CN): ppm; 5 mg/m3 (skin) (ACGIH 1991-1992).
Poison_Class
1
Exposure effects
Initially, headache, vertigo, and agitation occur, followed by combative behavior, coma, seizures, and death.
   Ingestion
Burning sensation in the throat and chest.
   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
If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. MMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
1575
Response guide
Hazard class
6.1
Packing Group
I
 
USCG CHRIS Code
CCN
 
Std. Transport #
4923223