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Chemical Name: Potassium sulfate
Common Names: Sulfate of potash, arcanite
CAS Number: 7778-80-5
Formula: K2SO4
Appearance: White crystalline powder or granules; odorless
Hazard Class: Eye irritant, mild respiratory irritant
GHS Classification: Not considered hazardous as per standard chemical safety classifications
Routes of Exposure: Eyes, skin, inhalation, ingestion
Symptoms: Dust may irritate eyes, nose, or throat; large amounts can cause stomach distress if swallowed
Main Ingredient: Potassium sulfate
Purity: Usually above 99% for technical and agricultural grade
Impurities: Trace amounts of sodium chloride, magnesium sulfate, and insoluble materials
Eye Contact: Rinse eyes gently with plenty of water; blinking helps remove particles; medical help if irritation sticks around
Skin Contact: Wash skin with soap and water
Inhalation: Move to fresh air; drink water if coughing; get help if breathing stays tough
Ingestion: Rinse mouth, drink water, seek medical attention for large amounts or discomfort
Flammability: Not flammable
Suitable Extinguishing Media: Water, carbon dioxide, dry chemical
Fire Hazards: Does not contribute fuel to fire; heated containers may release sulfur dioxide gas, which smells harsh and can bother lungs
Protective Gear: Standard fire-fighting gear works
Personal Protection: Wear dust mask, safety goggles, gloves
Containment: Avoid making more dust; sweep up material and put in container
Cleanup: Wash area with water after removing powder
Environmental Care: Prevent powder from washing directly into waterways
Handling: Work in well-aired spot if possible; avoid breathing in dust or getting it on skin
Storage: Keep bags or containers tightly closed; store dry and out of direct sunlight
Incompatible Materials: Keep away from strong acids; mixing can release gases
Engineering Controls: Good ventilation works well for most workplaces
Eye Protection: Use safety goggles during use
Respiratory Protection: Dust mask if powder gets in the air
Skin Protection: Gloves for frequent or direct contact
State: Solid
Color: White
Odor: None
Solubility in Water: About 12 grams per 100 milliliters at room temperature
Melting Point: Around 1,069°C
Boiling Point: Not applicable; decomposes on strong heating
Density: About 2.66 g/cm³
pH (10% solution): Roughly 7
Chemical Stability: Stays stable under normal storage and use
Reactivity: Not reactive in most conditions; reacts with strong acids to form potassium salts and sulfur dioxide
Hazardous Byproducts: High heat or acids may release sulfur oxides
Acute Toxicity: Low toxicity; swallowing large amounts can lead to upset stomach, vomiting, or diarrhea
Skin Irritation: Mild or none for most people; can cause dryness with repeated contact
Eye Irritation: Dust can sting eyes
Chronic Effects: No solid case studies link long-term exposure to major health issues in regular use cases
Aquatic Toxicity: Not toxic to fish or aquatic plants in normal concentrations
Biodegradability: Not relevant; dissolves and separates into natural ions in soil or water
Soil Impact: Used to improve potassium in soil, but overuse may upset soil balance
Bioaccumulation: Not a concern; potassium and sulfate break up and do not build up in life forms
Disposal Methods: Small amounts can go to normal landfill with local rules in mind
Environmental Caution: Keep large spills from running straight into rivers or lakes
Reuse: Uncontaminated material can be used as fertilizer or sent to proper recycling
UN Number: Not regulated for road, air, sea, or rail worldwide
Hazard Class: Not classed as a hazardous material for transport
Packing Considerations: Good sealing, moisture protection, clear labels
Bulk Transport: No special rules beyond common sense for dry chemicals
Workplace Safety Regulation: Most countries treat it as a low-risk chemical; general dust limits may apply on job sites
Environmental Rules: Overuse in fields can get attention from water protection laws, but usual farm practice is accepted
Labeling: No special hazard labels are required beyond dust caution for large bags
Food and Fertilizer Laws: Approved for agricultural use in most regions, as long as purity stays high and it is used as intended
