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Material Safety Data Sheet for Potassium Chloride

Identification

Product Name: Potassium Chloride
Other Names: Muriate of Potash, Sylvite
Chemical Formula: KCl
CAS Number: 7447-40-7
Recommended Uses: Fertilizer, food processing, laboratory reagent, medicine
Supplier Details: Provided by local distributor or manufacturer
Contact Information: Check product label for emergency phone numbers

Hazard Identification

GHS Classification: Not classified as hazardous under GHS guidelines
Acute Health Effects: Inhalation may cause coughing and throat irritation; direct contact can irritate eyes or skin
Chronic Exposure: Prolonged exposure in dust form can aggravate respiratory conditions
Environmental Impact: Large releases can disrupt aquatic and terrestrial environments
Signal Word: None required
Precautionary Statement: Avoid creating and inhaling dust, wash hands after handling

Composition / Information on Ingredients

Chemical Identity: Potassium Chloride
Concentration: 98–100%
Impurities: Trace amounts of sodium chloride, magnesium salts, calcium salts depending on source
Molecular Weight: 74.55 g/mol
Physical State: Solid, crystalline

First Aid Measures

Eye Contact: Rinse cautiously with water for at least 15 minutes; seek medical attention if irritation continues
Skin Contact: Wash affected area with soap and water; remove contaminated clothing
Inhalation: Move to fresh air, seek medical attention for breathing difficulty
Ingestion: Rinse mouth and drink water; do not induce vomiting; contact poison control or healthcare provider
Medical Advice: Symptomatic treatment only; no specific antidote for potassium chloride overexposure

Fire-Fighting Measures

Suitable Extinguishing Media: Use water spray, dry chemical, or carbon dioxide
Unsuitable Media: No specific restrictions
Special Hazards: Product itself does not burn; in case of surrounding fire, hazardous gases such as hydrogen chloride may form
Firefighter Protection: Use self-contained breathing apparatus and full protective gear in confined areas

Accidental Release Measures

Personal Precautions: Avoid breathing dust; wear dust mask, goggles, and gloves
Environmental Precautions: Prevent spill from entering watercourses or sewers; potassium chloride can impact aquatic life
Cleanup Methods: Sweep up material, avoid creating dust clouds; place in labeled waste containers; ventilate area and wash spill site with water after pickup
Disposal: Follow local regulations for large spills or any contaminated cleaning materials

Handling and Storage

Safe Handling: Use proper ventilation to minimize dust; handle bags or containers with care to prevent breakage
Hygiene Practices: Wash hands thoroughly after handling, avoid eating, drinking, or smoking near storage or work areas
Storage Conditions: Store in a cool, dry, well-ventilated facility; keep container tightly closed; stack bags safely to avoid collapse
Incompatible Materials: Avoid contact with strong acids or oxidizing agents
Shelf Life: Stable under recommended storage conditions for long periods

Exposure Controls and Personal Protection

Exposure Limits: No established OSHA or ACGIH limits for potassium chloride; general nuisance dust limits apply (10 mg/m3 total dust, 5 mg/m3 respirable fraction)
Engineering Controls: Use local exhaust ventilation if dust is generated
Personal Protective Equipment: Safety glasses or goggles, gloves, dust mask or NIOSH-approved respirator in dusty environments, protective clothing as needed
Environmental Controls: Precautions to prevent accidental release to surface water or drains

Physical and Chemical Properties

Appearance: White or colorless crystalline solid, sometimes pinkish
Odor: Odorless
Solubility: Highly soluble in water (34.2 g/100 mL at 20°C)
Melting Point: 770°C
Boiling Point: Sublimation at 1500°C
Density: 1.98 g/cm3 at 25°C
pH: Neutral aqueous solution (pH 7)
Vapor Pressure: Negligible at room temperature
Other Properties: Non-flammable, non-explosive, no odor threshold

Stability and Reactivity

Chemical Stability: Stable under normal conditions
Conditions to Avoid: Excessive moisture can cause caking; high temperatures for prolonged periods
Incompatible Materials: Strong acids can release hydrogen chloride gas; strong oxidizers
Hazardous Decomposition Products: Thermal decomposition produces chlorine and potassium oxides
Reactivity: Minimal under standard handling practices

Toxicological Information

Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Oral LD50 (rat) – 2600 mg/kg; low toxicity by inhalation/skin
Chronic Toxicity: High doses over time can impact electrolyte balance, especially for individuals with kidney problems
Irritation: Dust can cause mild irritation to eyes and respiratory tract
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Other Effects: Large doses of ingested potassium chloride can seriously disturb heart rhythm; risk is higher for those with pre-existing health conditions

Ecological Information

Ecotoxicology: High concentrations may harm plants and freshwater organisms
Aquatic Toxicity: LC50 (fish, 96 hours): approximately 2010 mg/L
Persistence and Degradability: Potassium chloride readily dissolves and disperses in water, becoming part of the natural potassium cycle
Bioaccumulation: Not anticipated in aquatic or terrestrial organisms
Mobility: Highly mobile in soil when dissolved
Other Environmental Hazards: Excess fertilizer runoff can cause salinization of soil and disrupt aquatic habitats

Disposal Considerations

Waste Disposal Method: Follow all local, regional, and national regulations; small quantities can often be dissolved and washed away with plenty of water, larger quantities should be collected for proper disposal
Container Handling: Rinse empty containers before disposal; do not reuse packaging for other substances
Special Precautions: Avoid releasing into the environment; inform local authorities in case of large scale spills

Transport Information

UN Number: Not classified as a dangerous good
Proper Shipping Name: Potassium Chloride
Transport Hazard Class: Not regulated
Packing Group: Not assigned
Special Precautions for Transport: Keep containers sealed and protected from moisture during shipping; prevent rough handling and avoid stack collapses

Regulatory Information

OSHA Status: Not classified as hazardous
WHMIS Classification: Not controlled
EPCRA Section 313: Not listed
TSCA Inventory: Listed
Other Regulatory Info: Check local environmental regulations; some states may issue advisories for nutrient runoff or fertilizer management
Food and Drug Administration: Approved for use in food at specified levels; always consult local guidelines for use in food or feed