© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Product Name: Potassium Ferrocyanide Trihydrate
Chemical Formula: K4[Fe(CN)6] · 3H2O
Synonyms: Yellow Prussiate of Potash, Tripotassium hexacyanoferrate trihydrate
CAS Number: 14459-95-1
Recommended Use: Laboratory reagent, photography, chemical processing, water treatment
Manufacturer: Refer to supplier section on packaging
Contact Information: Manufacturer customer service number, address as listed on packaging
Classification: Not classified as hazardous under GHS criteria, but can release toxic gases upon decomposition
Hazard Statements: May release highly toxic hydrogen cyanide gas if exposed to acids or severe heat
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Health Hazards: Nausea, vomiting, headache, dizziness if large amounts are inhaled or ingested; skin and eye irritation
Environmental Hazards: Harmful in large quantities to aquatic life due to cyanide ion release under acidic conditions
Precautionary Statements: Always handle using appropriate safety measures to minimize dust or gas exposure
Chemical Name: Potassium Ferrocyanide Trihydrate
Purity: ≥99%
Molecular Weight: 422.39 g/mol
Impurities: Trace levels of sodium and chloride compounds may exist, but do not significantly impact material safety
Other Ingredients: Contains three molecules of water per molecule of salt
Inhalation: Move affected person to fresh air, keep at rest, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, wash thoroughly with soap and water, obtain medical advice for persistent irritation
Eye Contact: Flush with flowing water for at least fifteen minutes, lifting eyelids carefully, seek medical advice if discomfort remains
Ingestion: Rinse mouth thoroughly, never induce vomiting, call poison center or physician immediately; ingestion of large amount can be hazardous
Note to Physician: Supportive care, monitor for signs of cyanide poisoning in severe exposure; oxygen therapy recommended if necessary
Suitable Extinguishing Media: Use dry chemical, CO2, or foam. Water spray can be used to cool containers
Unusual Fire Hazards: Exposed to intense heat or acids, may liberate toxic gases including hydrogen cyanide, ammonia, and oxides of nitrogen
Protective Equipment: Self-contained breathing apparatus and chemical protective clothing recommended for firefighters
Special Procedures: Evacuate area, avoid inhalation of fumes; prevent contaminated water from entering sewers or waterways
Personal Protection: Don chemical-resistant gloves, safety goggles, protective clothing before dealing with any spill
Spill Cleanup Methods: Sweep up material without creating dust, place in suitable sealed container for disposal
Environmental Precautions: Prevent material from entering drains, surface water, or soil; contact emergency services in case of significant spills
Decontamination: Clean spill area thoroughly with water after material is removed; use alkaline cleaners to neutralize traces
Handling: Always use in well-ventilated areas, avoid generating dust, do not eat, drink, or smoke during use
Hygiene Practices: Wash hands thoroughly after handling, remove contaminated clothing before breaks
Storage Conditions: Store in tightly closed, labeled containers in cool, dry, well-ventilated location, away from acids and incompatible materials
Incompatibilities: Strong acids, oxidizing agents, and sources of intense heat or flame must be kept separate from material
Occupational Exposure Limits: No established OSHA or ACGIH limits for potassium ferrocyanide; maintain dust levels as low as possible
Engineering Controls: Apply local exhaust ventilation to minimize dust and airborne particles
Respiratory Protection: Use NIOSH-approved respirator in areas of insufficient ventilation or risk of inhaling dust
Protective Clothing: Impermeable gloves, safety goggles, lab coat, closed footwear recommended when handling
General Safety: Facilities should offer eyewash stations and emergency showers; monitor for accidental exposure and symptoms
Appearance: Pale yellow crystalline powder or granules
Odor: Odorless
Solubility: Soluble in water, forming a clear, slightly yellow solution
pH in Solution: Neutral to slightly alkaline in water
Melting Point: Decomposes before melting at temperatures above 60°C
Boiling Point: Not applicable, decomposes
Vapor Pressure: Negligible at ambient temperature
Density: Approximately 1.85 g/cm3
Partition Coefficient (n-octanol/water): Not determined
Other Properties: Loses water of crystallization on heating; stable under normal conditions when dry and unreacted
Chemical Stability: Stable under recommended storage conditions; hygroscopic
Conditions to Avoid: Exposure to strong acids, high temperatures, and incompatibles
Incompatible Materials: Acids (liberate toxic hydrogen cyanide gas), strong oxidizers, reducing agents
Hazardous Decomposition Products: Hydrogen cyanide gas, ammonia, iron oxides, potassium oxides, nitrogen oxides upon heating or acidification
Polymerization: Will not polymerize under normal storage and use conditions
Acute Toxicity: LD50 (oral, rat) > 1600 mg/kg; low acute toxicity in intact salt, but toxic effects possible if exposed to acid or high temperatures
Skin Irritation: May cause irritation upon prolonged contact
Eye Irritation: Can induce moderate irritation
Chronic Effects: No evidence of sensitization; chronic inhalation or ingestion may affect the thyroid due to release of cyanide in extreme circumstances
Carcinogenicity: No components classified as carcinogens
Symptoms of Overexposure: Headache, dizziness, nausea, vomiting, rapid breathing, incoordination, rarely convulsions if high doses ingested or inhaled
Aquatic Toxicity: Harmful to aquatic organisms if large quantities or breakdown products are released
Environmental Fate: Slow breakdown in the environment; potential for cyanide release if mixed with acids
Mobility in Soil: Moderately mobile; can persist, especially if conditions remain neutral or slightly alkaline
Bioaccumulation: Not expected to bioaccumulate under normal environmental conditions
Other Hazards: Cyanide ions generated in acidic conditions may deplete oxygen in water, endangering aquatic life
Disposal Methods: Dispose of in compliance with local, regional, national, and international regulations
Waste Treatment: Precipitate with ferrous sulfate under alkaline conditions to form insoluble iron cyanides before disposal
Container Disposal: Ensure containers are empty and rinsed, then dispose of as non-hazardous waste if allowed
Precautions: Prevent entry into wastewater, natural waters, or landfill without proper treatment; consult waste professionals
UN Number: Not classified for transport under standard UN recommendations
Proper Shipping Name: Not regulated as dangerous for most common shipping modes
Hazard Class: Not assigned
Packing Group: Not assigned
Environmental Hazards: Not a marine pollutant, but must be kept dry and away from acids during shipment
Transport Precautions: Store upright, ensure outer packaging remains intact, label properly in case of bulk shipments
US Federal Regulations: Not listed as hazardous under OSHA, CERCLA, SARA Title III, or TSCA, but regulated due to potential cyanide generation
EU Regulations: Not classified as a hazardous substance under current EU regulations, but falls under REACH chemical safety reporting
Labeling Requirements: Must include risk of cyanide gas release, pictograms for toxic gas where required
Other International Regulations: Observe specific requirements in country of use, including import/export and workplace handling regulations
