Understanding the Safety Profile of Perfluorooctanesulfonic Acid Potassium Salt

Identification

Name: Perfluorooctanesulfonic Acid Potassium Salt
Chemical formula: C8F17KO3S
Other names: PFOS potassium salt
Typical appearance: White solid or powder form
Common uses: Used in surfactants, stain repellents, fire-fighting foams, mist suppressants, and as a wetting agent in industrial processing

Hazard Identification

Main hazards: Highly persistent, accumulates in living organisms, causes toxicity for aquatic life, and is harmful if ingested or inhaled
Health effects: Long-term exposure may harm liver function, suppress immune response, increase cholesterol, and disrupt hormonal systems
Environmental risks: Causes lasting harm to aquatic ecosystems and moves up the food chain
Warning labels: Corrosive, toxic, dangerous for the environment
Routes of exposure: Inhalation, ingestion, skin contact

Composition / Information on Ingredients

Main component: Perfluorooctanesulfonic acid potassium salt
Chemical Identity: C8F17KO3S, CAS Number 2795-39-3
Impurities: May contain trace amounts of non-PFOS fluorinated compounds and residual solvents depending on production method
Concentration: Pure or at high concentrations in industrial use

First Aid Measures

Inhalation: Move to fresh air, support breathing, seek medical attention if shortness of breath or coughing persists
Skin contact: Wash exposed area with plenty of water and mild soap, remove contaminated clothing, medical help for irritation
Eye contact: Rinse with water for several minutes, lift eyelids occasionally, consult medical help if irritation remains
Ingestion: Rinse mouth, seek medical help right away, do not induce vomiting
Symptoms to watch: Irritation of skin, eyes, and mucous membranes, nausea, headaches, coughing in case of dust exposure

Fire-Fighting Measures

Flammability: Perfluorooctanesulfonic acid potassium salt does not easily ignite
Suitable extinguishers: Dry chemical, foam, CO2
Hazardous byproducts: Decomposition in fire releases toxic and corrosive gases including hydrogen fluoride, sulfur oxides, and dangerous fluorinated compounds
Protective equipment: Firefighters require self-contained breathing apparatus and chemical-resistant gear in event of fire
Special advice: Keep run-off from water used in firefighting out of water sources as it spreads the contamination

Accidental Release Measures

Precautions: Evacuate unnecessary personnel, ventilate area, prevent dust from spreading
Personal protection: Respiratory mask, gloves, safety goggles, and protective clothing
Spill cleanup: Collect dry spill using tools or absorbent materials, store waste in sealed chemical-resistant containers
Disposal: Do not wash down storm drains or sewers, prevent leaks to watercourses
Decontamination: Wash area thoroughly, handle all waste as hazardous

Handling and Storage

Safe handling: Minimize dust generation, use in well-ventilated areas, avoid ingestion, inhalation, and skin contact
Storage requirements: Store in tightly sealed containers made of compatible materials, in cool, dry and well-ventilated areas
Separation: Keep away from strong acids, bases, oxidizers, and moisture
Labeling: Mark containers clearly and keep them off the ground to prevent water contamination

Exposure Controls and Personal Protection

Ventilation: Use general and local exhaust to keep workplace air clean
Personal protective equipment: Chemical-resistant gloves, safety goggles, long-sleeved clothing, and if necessary, a respirator to prevent dust inhalation
Environmental controls: Prevent discharge to the environment, use engineered solutions like closed systems and containment
Hygiene measures: Wash hands and face after handling, eat or drink only in areas free from contamination, launder clothing separately

Physical and Chemical Properties

Physical state: Solid, usually white or off-white powder
Odor: No significant odor
Melting point: Around 370°C
Solubility: Easily dissolves in water producing a perfluorooctanesulfonate ion and potassium
Stability: Stable under normal temperatures and pressure
Vapor pressure: Negligible
Density: Varies with form, but heavier than water

Stability and Reactivity

Chemical stability: Resists breakdown under ordinary conditions
Potential reactions: Reacts with strong acids and bases, decomposes at high heat releasing hydrogen fluoride and other hazardous gases
Conditions to avoid: Prolonged exposure to direct sun, moisture, or excessive heat
Incompatible materials: Strong oxidizers, reducing agents, and acids or bases

Toxicological Information

Acute effects: Can cause irritation of skin, eyes, upper respiratory tract
Chronic exposure: Linked in studies to liver toxicity, disruption of hormonal balance, immune suppression, developmental effects
Bioaccumulation: Binds strongly to proteins, remains in tissues for years, passes through food chains
Carcinogenicity: Some animal studies show increased tumors at high exposures, human evidence suggests risk though mechanisms are still under study
Other effects: May affect cholesterol and thyroid hormone balance based on animal and human epidemiological studies

Ecological Information

Environmental persistence: Extremely stable, breaks down very slowly in nature
Water contamination: Moves easily through water, accumulates in sediments, impacts aquatic life
Bioaccumulation potential: Builds up in living organisms over time, especially top predators including birds and mammals
Ecotoxicity: Toxic at low concentrations to aquatic organisms, causes reproductive harm and developmental issues in many species
Global distribution: Detected worldwide, even in remote areas, including Arctic regions

Disposal Considerations

Disposal method: Only high-temperature incineration can destroy the compound, regular landfilling or untreated discharge spreads contamination
Do not release: Strictly avoid washing down drains, dumping in environments, or burning outside approved facilities
Waste labeling: Package and mark as hazardous waste, comply with local and national guidelines
Spill residues: Manage all cleanup materials as hazardous, do not attempt to dilute in water

Transport Information

Shipping precautions: Use robust, sealed containers to prevent dust or leaking during transport
Identification: Mark shipments as hazardous material for environmental and health risks
Regulations: Follow rules covering hazardous substances and keep records of amounts and shipment routes
Emergency measures: Have containment and spill kits available if transporting large amounts

Regulatory Information

International controls: Listed under international treaties and agreements as a persistent organic pollutant, with restrictions or bans on manufacture and use in many countries
Local requirements: Subject to regulation by environmental, health and safety agencies; facilities handling significant amounts must report use and emissions
Workplace limits: Some countries establish occupational exposure limits due to toxic effects, enforcement varies
Product phase-out: Governments are phasing out PFOS-related substances in favor of safer alternatives, but legacy waste and contamination remain a challenge