**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****
+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 151-50-8 |Potassium cyanide | >96 | 205-792-3 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: T+ N
Risk Phrases: 26/27/28 32 50/53
**** SECTION 3 - HAZARDS IDENTIFICATION ****
EMERGENCY OVERVIEW
Very toxic by inhalation, in contact with skin and if swallowed.
Contact with acids liberates very toxic gas. Very toxic to aquatic
organisms, may cause long-term adverse effects in the aquatic
environment.
Potential Health Effects
Eye:
Contact with eyes may cause severe irritation, and possible eye
burns. Cyanide can be absorbed through the eyes causing the symptoms
described for inhalation.
Skin:
May be fatal if absorbed through the skin. Contact with skin causes
irritation and possible burns, especially if the skin is wet or
moist. Causes symptoms similar to those of inhalation. Skin
absorption may cause unconsciousness.
Ingestion:
May be fatal if swallowed. Causes gastrointestinal tract burns. May
cause effects similar to those for inhalation exposure. May cause
tissue anoxia, characterized by weakness, headache, dizziness,
confusion, cyanosis (bluish skin due to deficient oxygenation of the
blood), weak and irregular heart beat, collapse, unconsciousness,
convulsions, coma and death. Contains cyanide. Human fatalities have
been reported from acute poisoning. Large doses of cyanide may result
in suddden loss of consciousness and prompt death; small doses will
prolong the above symptoms 1 to 2 hours.
Inhalation:
May be fatal if inhaled. Causes respiratory tract irritation.
Inhalation may result in symptoms similar to cyanide poisoning which
include tachypnea, hyperpnea (abnormally rapid or deep breathing),
and dyspnea (labored breathing) followed rapidly by respiratory
depression. Pulmonary edema may occur. KCN reacts with moisture to
release very toxic hydrogen cyanide vapor (HCN). Inhalation of 20-40
ppm HCN may result in slight symptoms of poisoning. Higher
concentrations can cause death within minutes or hours. Early
symptoms include weakness, headache, giddiness, dizziness, confusion,
anxiety, nausea and vomiting.
Chronic:
Chronic exposure can affect thyroid function. Chronic exposure to
cyanide solutions may lead to the development of a "cyanide" rash,
characterized by itching, and by macular, papular, and vesicular
eruptions, and may be accompanied by secondary infections.
**** SECTION 4 - FIRST AID MEASURES ****
Eyes:
Treat patient as for inhalation. In case of contact, immediately
flush eyes with plenty of water for at least 15 minutes. Get medical
aid immediately.
Skin:
Get medical aid immediately. Immediately flush skin with plenty of
water for at least 15 minutes while removing contaminated clothing
and shoes. Discard contaminated clothing in a manner which limits
further exposure. SPEEDY ACTION IS CRITICAL! Treat patient as for
inhalation.
Ingestion:
Get medical aid immediately. SPEED IS ESSENTIAL. A DOCTOR MUST BE
NOTIFIED AT ONCE. Do not give anything by mouth. Treat patient as
for inhalation.
Inhalation:
Remove from exposure and move to fresh air immediately. Do NOT use
mouth-to-mouth resuscitation. Keep warm and at rest. Administer
oxygen. If breathing has ceased apply artificial respiration using
oxygen and a suitable mechanical device such as a bag and a mask.
SPEED IS ESSENTIAL, OBTAIN MEDICAL AID IMMEDIATELY.
Notes to Physician:
Prompt action is essential in all cases of contact. Exposure should
be treated as a cyanide poisoning.
**** SECTION 5 - FIRE FIGHTING MEASURES ****
General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. Contact with acid or acid fumes evolves heat and
flammable vapors. Containers may explode when heated or if
contaminated with water. Non-combustible, substance itself does not
burn but may decompose upon heating to produce corrosive and/or toxic
fumes.
Extinguishing Media:
Use alkali dry chemical. DO NOT USE carbon dioxide or acidic dry
chemical extinguishers since very toxic and flammable HCN will be
released.
**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****
General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal
container. Avoid runoff into storm sewers and ditches which lead to
waterways. Clean up spills immediately, observing precautions in the
Protective Equipment section. Avoid generating dusty conditions.
Decontaminate trace cyanide in the spill area with a strong sodium or
calcium hypochlorite solution and flush waste to a holding area for
potassium removal. Provide ventilation. Prevent spreading of vapors
through sewers, ventilation systems and confined areas. Evacuate
unnecessary personnel.
**** SECTION 7 - HANDLING and STORAGE ****
Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Minimize dust generation and accumulation. Do not
get in eyes, on skin, or on clothing. Do not ingest or inhale. Acids
should not be used around sodium cyanide or potassium cyanide unless
absolutely necessary and then only after careful planning. Hydrogen
cyanide (HCN) formation is the greatest potential hazard in using
sodium cyanide or potassium cyanide solutions because some HCN gas
will be released. Use only with adequate ventilation or respiratory
protection.
Storage:
Store in a tightly closed container. Keep from contact with
oxidizing materials. Store in a cool, dry, well-ventilated area away
from incompatible substances. Poison room locked. Keep away from
acids. Store protected from moisture.
**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****
Engineering Controls:
Use process enclosure, local exhaust ventilation, or other
engineering controls to control airborne levels below recommended
exposure limits. Facilities storing or utilizing this material should
be equipped with an eyewash facility and a safety shower.
Exposure Limits
CAS# 151-50-8:
United States OSHA: 5 mg/m3 TWA (listed under Cyanide anion).
Belgium - STEL: 5 mg/m3 VLE
Germany: (listed as cyanide anion): Skin absorber
Japan: 5 mg/m3 Ceiling (as CN)
Malaysia: 5 mg/m3 Ceiling (as CN)
Netherlands: (listed as cyanide anion): 5 mg/m3 MAC (as CN)
Spain: 5 mg/m3 VLA-EC
Personal Protective Equipment
Eyes:
Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves 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 respirator use.
**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****
Physical State: Crystalline powder
Color: white
Odor: faint odor of bitter almond
pH: 11 (0.1N)
Vapor Pressure: 0 mm Hg @ 20 deg C
Viscosity: Not available.
Boiling Point: 1625 deg C
Freezing/Melting Point: 634 deg C
Autoignition Temperature: Not applicable.
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Soluble in water
Specific Gravity/Density: 1.52 @ 16C
Molecular Formula: KCN
Molecular Weight: 65.11
**** SECTION 10 - STABILITY AND REACTIVITY ****
Chemical Stability:
Stable in dry air, but slowly decomposes in moist air.
Conditions to Avoid:
Dust generation, moisture, excess heat, confined spaces.
Incompatibilities with Other Materials:
Violent reactions can occur with strong oxidizing agents. Contact
with acids liberates extremely toxic and flammable hydrogen cyanide
gas. Reacts with carbon dioxide to produce HCN. Reacts slowly with
water to produce HCN. Solutions are corrosive to metals.
Hazardous Decomposition Products:
Hydrogen cyanide, nitrogen oxides, ammonia.
Hazardous Polymerization: Will not occur.
**** SECTION 11 - TOXICOLOGICAL INFORMATION ****
RTECS#:
CAS# 151-50-8: TS8750000
LD50/LC50:
CAS# 151-50-8: Oral, mouse: LD50 = 8500 ug/kg; Oral, rabbit: LD50 =
5 mg/kg; Oral, rat: LD50 = 5 mg/kg; Oral, rat: LD50 = 6 mg/kg.
Human LDLo Oral: 2857 ug/kg.
Carcinogenicity:
Potassium cyanide -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
**** SECTION 12 - ECOLOGICAL INFORMATION ****
Ecotoxicity:
Daphnia: Daphnia: 2 mg/l; 48H; EC50
**** SECTION 13 - DISPOSAL CONSIDERATIONS ****
Dispose of in a manner consistent with federal, state, and local regulations.
**** SECTION 14 - TRANSPORT INFORMATION ****
IATA
Shipping Name: POTASSIUM CYANIDE
Hazard Class: 6.1
UN Number: 1680
Packing Group: I
IMO
Shipping Name: POTASSIUM CYANIDE, SOLID
Hazard Class: 6.1
UN Number: 1680
Packing Group: I
RID/ADR
Shipping Name: POTASSIUM CYANIDE
Hazard Class: 6.1
UN Number: 1680
Packing group: I
USA RQ: CAS# 151-50-8: 10 lb final RQ; 4.54 kg final RQ
**** SECTION 15 - REGULATORY INFORMATION ****
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T+ N
Risk Phrases:
R 26/27/28 Very toxic by inhalation, in contact with
skin and if swallowed.
R 32 Contact with acids liberates very toxic gas.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 7 Keep container tightly closed.
S 28A After contact with skin, wash immediately with
plenty of water.
S 29 Do not empty into drains.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 151-50-8: 3
Canada
CAS# 151-50-8 is listed on Canada's DSL List.
CAS# 151-50-8 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 151-50-8 is listed on the TSCA inventory.
**** SECTION 16 - ADDITIONAL INFORMATION ****
MSDS Creation Date: 12/23/1997 Revision #6 Date: 2/08/2005
The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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