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CAS Number: 11135-81-2 Product Catalog

Potassium Potassium sodium alloy 78:22 (99.95%)
CAS Number: 11135-81-2
MDL Number: MFCD00134088
Molecular Formula: KNa
Molecular Weight:  
Chemical Formula: NaK
Color and Form: liq.; 78% K, 22% Na (under argon)

Stability: air sensitive, moisture sensitive

Safety: Hazardous - an additional Dangerous Goods freight charge may apply

Physical Characteristics: melting point -12.6°C, boiling point 785°C, density 0.855

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SECTION 1: Product Identification
Chemical Name: Potassium sodium alloy 78:22 (99.95%)
Product Number: 19-1910
CAS Registry Number: 11135-81-2
Formula: NaK
EINECS Number: none
Chemical Family: metal or element
Synonym: none
SECTION 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title compound 11135-81-2 100 no data no data
SECTION 3: Hazards Identification
Emergency Overview: The alloy rapidly forms caustic and highly corrosive alkali hydroxide with evolution of heat. Severe thermal and chemical burns will result at every point of human contact.
Primary Routes of Exposure: Contact with skin and eyes.
Eye Contact: Severe thermal burns, corrosion and ulceration of the eyes may occur on direct contact.
Skin Contact: Severe thermal burns, corrosion and ulceration of the skin may occur on direct contact.
Inhalation: Alloy is a liquid. Inhalation is an unlikely occurrence
Ingestion: Ingestion will cause burns and perforations of the gastrointestinal tract.
Acute Health Effects: With moisture or human contact, metal rapidly forms caustic and highly corrosive alkali hydroxide with evolution of heat. Severe thermal and chemical burns will result.
Chronic Health Effects: No information available on long-term chronic effects. Impurities in some mineral oils may be tumorigens.
SECTION 4: First Aid Measures
Eye Exposure: Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need assistance in keeping their eye lids open. Get immediate medical attention.
Skin Exposure: Wash the affected area with water for at least 15 minutes. Remove contaminated clothes if necessary. Seek medical assistance if irritation persists.
Inhalation: (For dust or fume) Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty in breathing or coughing. In such cases seek immediate medical assistance.
Ingestion: Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce vomiting only if directed by medical personnel.
SECTION 5: Fire Fighting Measures
Flash Point: not applicable
Autoignition Temperature: no data
Explosion Limits: no data
Extinguishing Medium: Class D metal fire agent, dry salt or sand.
Special Fire Fighting Procedures: If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure self-contained breathing apparatus.
Hazardous Combustion and Decomposion Products: If involved in a fire, burning metal may produce corrosive fumes of sodium and potassium oxide and hydroxide.
Unusual Fire or Explosion Hazards: Flammable liquid. May self-ignite. Dust may form explosive mixtures with air. Evolves flammable hydrogen with water.
SECTION 6: Accidental Release Measures
Spill and Leak Procedures: Liquid may be pyrophoric. In the case of a spill, the liquid dispersion should be covered with dry soda ash, limestone, or sand. Place in open container and seek expert advice.
SECTION 7: Handling and Storage
Handling and Storage: Store in a tightly sealed container in argon and under mineral oil, in a cool dry place. Handle in Argon.
SECTION 8: Exposure Controls and Personal Protection
Eye Protection: Always wear approved chemical splash proof goggles.
Skin Protection: Wear protective clothing and gloves. Consult with glove manufactuer to determine the proper type of glove.
Ventilation: Handle in an efficient fume hood.
Respirator: If ventilation is not available a respirator should be worn. The use of respirators requires a Respirator Protection Program to be in compliance with 29 CFR 1910.134.
Additional Protection: Prepare for the possibility of fire.
SECTION 9: Physical and Chemical Properties
Color and Form: liquid; 78% K, 22% Na (under argon)
Molecular Weight: not applicable
Melting Point: -12.6°C
Boiling Point: 785°C
Vapor Pressure: no data
Specific Gravity: 0.855
Odor: none
Solubility in Water: reacts violently with water
SECTION 10: Stability and Reactivity
Stability: air sensitive, moisture sensitive
Hazardous Polymerization: no hazardous polymerization
Conditions to Avoid: Contact with water or of any fine dust with air.
Incompatibility: Water, alcohols, oxidizers, oxygen, carbon dioxide, halogens, halocarbons, acids.
Decomposition Products: Flammable hydrogen with moisture, caustic oxide with air or moisture.
SECTION 11: Toxicological Information
RTECS Data: No information available in the RTECS files.
Carcinogenic Effects: No data available
Mutagenic Effects: No data available
Tetratogenic Effects: No data available
SECTION 12: Ecological Information
Ecological Information: No information available
SECTION 13: Disposal Considerations
Disposal: Dispose of according to local, state and federal regulations.
SECTION 14: Transportation
Shipping Name (CFR): Potassium Sodium alloys, Liquid
Hazard Class (CFR): 4.3
Additional Hazard Class (CFR): NA
Packaging Group (CFR): I
UN ID Number (CFR): UN# 1422
Shipping Name (IATA): Potassium Sodium alloys, Liquid
Hazard Class (IATA): 4.3
Additional Hazard Class (IATA): NA
Packaging Group (IATA): I
UN ID Number (IATA): UN# 1422
SECTION 15: Regulatory Information
TSCA: Listed in the TSCA inventory.
SARA (Title 313): Title compound not listed
Second Ingredient: Listed in the TSCA inventory
Third Ingredient: none
SECTION 16: Other Information
Disclaimer: The information herein is believed to be accurate and reliable as of the date compiled. However, Strem Chemicals, Inc. makes no representation, warranty, or guarantee of any kind with respect to the information contained in this document or any use of the product based on this information.
Preparation Date: 11/27/2000
Revision Date: 2/23/2012

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