Material Safety Data Sheet (MSDS) for Compound Fertilizer (NPK Fertilizer)

Identification

Product Name: Compound Fertilizer (NPK Fertilizer)
Manufacturer: Major chemical manufacturers and agricultural supply companies.
Common Names: Nitrogen-Phosphorus-Potassium Fertilizer, Mixed Fertilizer, NPK Blend
Use: Soil amendment for agriculture, horticulture, landscaping
Emergency Numbers: Local poison control centers and manufacturer hotlines
Synonyms: Complete Fertilizer, Balanced Fertilizer, Multi-nutrient Blend

Hazard Identification

Physical State: Usually granules or prills, sometimes powder
Color: Variable, often gray, white, brown, or light red
Odor: Odorless or slightly chemical
Acute Hazards: Dust inhalation may cause mild respiratory irritation; eye contact may result in redness or irritation; skin contact rarely causes irritation, but sensitive individuals may develop rashes or itchiness
Fire Risk: Not highly flammable but can support combustion if contaminated with organic materials or oils
Reactive Risks: Mixing with strong acids or alkaline substances may release toxic gases such as ammonia or nitrogen oxides
Chronic Hazards: Prolonged exposure may lead to mild skin dryness or cracking; chronic ingestion is toxic
Environmental Hazard: Runoff into waterways can cause eutrophication, leading to algal blooms

Composition / Information on Ingredients

Nitrogen Compounds: Ammonium nitrate, urea, ammonium sulfate (Range: 5-40%)
Phosphorus Compounds: Monoammonium phosphate, diammonium phosphate, superphosphate (Range: 5-30%)
Potassium Compounds: Potassium chloride, potassium sulfate (Range: 5-25%)
Other Components: Minor micronutrients such as magnesium, sulfur, iron, zinc, copper (usually totals less than 5%)
Inert Carriers: Clay, limestone, water (content varies depending on product type)

First Aid Measures

Inhalation: Remove to fresh air; seek medical attention if symptoms persist such as coughing, difficulty breathing, or dizziness
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing; persistent irritation should be checked by a physician
Eye Contact: Rinse eyes thoroughly with water for at least 15 minutes; keep eyelids open; seek immediate attention for persistent pain or impaired vision
Ingestion: Rinse mouth, offer small sips of water; do not induce vomiting; seek medical help immediately, especially for children or those with underlying health issues

Fire-Fighting Measures

Extinguishing Media: Use dry chemical powder, water spray, or foam; avoid using carbon dioxide in large fires as it may enhance combustion
Fire Hazards: Product itself does not usually burn, but supports combustion and can intensify nearby fires if mixed with flammable materials
Protective Gear: Firefighters should wear chemical-resistant clothing, boots, gloves, and self-contained breathing apparatus
Special Procedures: Keep containers cool with water spray; control run-off to prevent entry into drains or water systems
Explosion Risk: Heating above 210°C or contamination with incompatible materials can result in violent decomposition or explosion

Accidental Release Measures

Personal Precautions: Wear gloves, dust mask, and goggles to reduce exposure to dust and residues
Spill Cleanup: Sweep up material to minimize dust; collect in clean, dry containers for reuse if uncontaminated, otherwise dispose off according to local environmental procedures
Environmental Precautions: Prevent spilled material from entering sewers, watercourses, or soil; notify authorities if large spill threatens water supply or ecosystem
Disposal: Contaminated soils or absorbents should be transferred to approved disposal sites

Handling and Storage

Safe Handling: Avoid breathing dust; use in well-ventilated areas; wear suitable gloves when handling large amounts
Storage Requirements: Store in dry, well-ventilated area away from sources of heat or ignition; do not store with acids, alkalis, or combustible materials
Container Advice: Keep containers tightly closed and labeled; use corrosion-resistant storage bins; prevent bag tears and spills
Special Considerations: Prevent moisture ingress to avoid caking and promote shelf stability; do not stack bags or containers excessively to avoid rupture

Exposure Controls and Personal Protection

Engineering Controls: Use local exhaust ventilation in processing or mixing areas; dust extraction recommended in packaging
Personal Protection: Wear protective gloves, chemical safety goggles, dust respirator where dust generation is likely
Occupational Limits: Standard exposure limits for fertilizer dust set at 10 mg/m³ total inhalable dust (consult national guidelines)
Hygiene Measures: Do not eat, drink, or smoke during application or handling of fertilizer; always wash hands and face thoroughly after working
Environmental Controls: Limit fertilizer application near waterways and use buffer strips to reduce runoff

Physical and Chemical Properties

Appearance: Granular or prilled solid, sometimes powdery
Color: White, gray, brown, red, or mixed shades
Odor: Largely odorless
pH (1% Solution): Typically neutral to slightly acidic (pH 5.5-7.5)
Melting Point: Decomposition occurs before melting; ammonium nitrate melts at 170°C
Solubility: Soluble in water, varying rates by component
Density: Bulk density ranges between 0.9 and 1.4 g/cm³
Stability: Stable under normal storage, caking occurs with prolonged humidity
Vapor Pressure: Not applicable

Stability and Reactivity

Stable Conditions: Stable in dry, cool, well-ventilated areas
Instability: High temperature, moisture, and contamination with incompatible materials can lead to decomposition
Incompatibility: Strong acids, strong bases, reducing agents, organic materials, chlorates, and combustibles
Decomposition Products: Heat or acid contact may produce ammonia, oxides of nitrogen, phosphorus pentoxide, or toxic fumes
Polymerization: Does not occur

Toxicological Information

Acute Toxicity: Inhalation of dust can cause mild respiratory irritation, cough, sore throat; direct ingestion can result in nausea, vomiting, abdominal pain, or in severe cases, shock and methemoglobinemia (for nitrate-containing products)
Skin Contact: Usually non-irritating, but sensitive individuals experience dryness, redness, or mild dermatitis
Eye Contact: Dust entry may cause mechanical irritation, tearing, mild conjunctivitis
Chronic Exposure: Long term high-level exposure to nitrate compounds has been linked to conditions such as blue baby syndrome (infants) due to methemoglobinemia; no evidence of carcinogenicity in humans when used responsibly
Sensitization: Cases of skin or respiratory sensitization are rare but possible among susceptible persons

Ecological Information

Mobility: Dissolves readily in water and moves through soil, leading to groundwater contamination if overapplied
Aquatic Toxicity: Excess fertilizer runoff stimulates harmful algal blooms, decreases oxygen levels, and damages aquatic life
Persistence and Degradability: Inorganic nutrients do not degrade, accumulate in soils and water
Bioaccumulation: NPK components do not bioaccumulate, but secondary effects harm ecosystems
Soil Impact: Long-term overuse leads to soil acidification, micronutrient imbalances, decreased soil health

Disposal Considerations

Product Waste: Fertilizer not fit for use should be disposed of at licensed waste disposal centers, never in watercourses
Container Disposal: Clean bags or containers before recycling or disposal; puncture and crush to prevent reuse
Treatment Methods: Consult local environmental rules for rules governing fertilizer disposal; avoid incineration due to risk of toxic gas release
Avoidance: Do not apply excessive rates to crops or soil to minimize runoff, leaching, and environmental harm

Transport Information

UN Number: Common NPK fertilizers not classified as hazardous for transport; ammonium nitrate-based blends classified as UN 2067
Transport Hazard Class: NPK - Not regulated; ammonium nitrate mixes - Class 5.1 oxidizer
Packing Group: No special requirements for most blends; extra regulation applies to oxidizer-type fertilizers
Special Precautions: Prevent spillage and keep dry during transport; do not store with fuels, organic substances, or acids in transport vehicles
Labeling: Clearly mark packages with product name and handling instructions

Regulatory Information

Global Regulations: Most countries regulate production, handling, storage, and application of fertilizer through agriculture and environmental departments
Labelling Requirements: Products must indicate N-P-K ratios, total nutrient content, and usage guidelines per local laws
Safety Directives: Fertilizer handling and application must comply with OSHA or equivalent workplace safety standards
Environmental Protection: Farms and retailers must follow buffer zone, timing, and reporting requirements to limit fertilizer runoff as per EPA or national requirements
Product Registration: All fertilizer blends must be registered and approved before sale, with periodic testing for adulterants and safety
Hazard Communication: Shipping docs must disclose hazards associated with ammonium nitrate blends or oxidizer fertilizers