Sodium cyanide

  • Cyanogran
Formula
CNNa
Structure
Description
A white crystalline solid, lump solid or powder. Distinct odor.
Uses
Extraction of gold and silver from ores, electroplating, heat treatment of metals (case-hardening), making hydrogen cyanide, insecticide, cleaning metals, fumigation, manufacture of dyes and pigments, nylon intermediates, chelating compounds, ore flotation.

Registry Numbers and Inventories.
CAS
143-33-9
EC (EINECS/ELINCS)
205-599-4
R 26/27/28 32 50/53
S 7 28 29 45 60 61
RTECS
VZ7525000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
1689
Merck
12,8750
Beilstein/Gmelin
17806 (G)
RCRA
P106
EPA OPP
74002
Swiss Giftliste 1
G-2584
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CNNa
Formula mass
49.00
Melting point, °C
563.9
Boiling point, °C
1496
Vapor pressure, mmHg
0.8 (800 C)
Vapor density (air=1)
1.7
Density
1.595 g/cm3 (20 C)
Solubility in water
362 g/L (25 C)
Viscosity
4 cp @ 30C (26% aqueous soln)
Refractive index
1.45
Thermal expansion
0.000058/K
Heat of fusion
18.2 kJ/mol
Heat of vaporization
149.0 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from strong acids. Poison room locked. Keep containers tightly closed. Store protected from moisture.
Handling
Wash thoroughly after handling. Wash hands before eating. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Do not allow contact with water. Use only in a chemical fume hood. Discard contaminated shoes. Keep from contact with moist air and steam.
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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Do not flush into a sewer. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures. Readily absorbs carbon dioxide and moisture from the air and deliquesces.
Incompatibilities
Strong oxidizing agents, acids, carbon dioxide, fluorine, magnesium, nitrates, nitric acid, perchlorates, metal cyanides, moisture, metal perchlorates.
Decomposition
Hydrogen cyanide, oxides of nitrogen, sodium oxide.

Fire.
Fire fighting
Full protective clothing including self-contained breathing apparatus, rubber gloves, boots, and bands around legs, arms, and waist should be provided. No skin surface should be exposed. Normal fire fighting procedures may be used.Fight fire from maximum distance. Move container from area if you can do it without risk. Dike fire control water for later disposal. Do not scatter the material.Use water. Use dry chemical, carbon dioxide, water spray, or foam for small fires, water spray, fog, or foam for large fires.
Fire potential
Nonflammable.
Hazards
Sodium cyanide is not combustible itself, but contact with acids releases highly flammable hydrogen cyanide gas. Runoff from fire control water may give off poisonous gases. Container may explode in the heat of fire. Avoid strong oxidizers such as nitrates and chlorates; acids and acid salts. Avoid contact with acids. Aqueous solutions rapidly decompose.
Combustion products
Toxic oxides of nitrogen are produced in fires involving this material.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: TWA 5 mg/m3 NIOSH REL: C 5 mg/m3 (4.7 ppm) 10-minute *Note: PEL and REL also apply to other cyanides (as CN) except Hydrogen cyanide. NIOSH IDLH: 25 mg/m3 (as CN)
Poison_Class
1
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. Prolonged or repeated contact may cause skin necrosis and/or ulceration of the skin. May cause reproductive and fetal effects.
   Ingestion
May be fatal if swallowed. May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. May cause tissue anoxia, characterized by weakness, headache, dizziness, confusion, cyanosis, weak and irregular heart beat, collapse, unconsciousness, convulsions, coma and death. Human fatalities have been reported from acute poisoning. May cause central nervous system damage and death can be rapid.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. Causes cyanosis, characterized by bluish-colored skin. May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause effects similar to those described for ingestion.
   Skin
May be fatal if absorbed through the skin. If absorbed, causes symptoms similar to those of ingestion. Causes severe skin irritation and possible burns. Substance is readily absorbed through the skin.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns. Contact may cause irritation, tearing, and burning pain. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Induce vomiting by giving one teaspoon of Syrup of Ipecac.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   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. Discard contaminated clothing in a manner which limits further exposure.
   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
1689
Response guide
Hazard class
6.1
PRTC
T
Packing Group
I
 
USCG CHRIS Code
SCN
 
Std. Transport #
4923228 4923227