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Product Name: Sodium Pentachlorophenoxide
Chemical Formula: C6Cl5ONa
Synonyms: Sodium pentachlorophenate
Recommended Use: Intermediate in organic synthesis, biocide, disinfectant
Supplier Contact: Refer to supplier’s label
Emergency Phone: Supplied on container label and in workplace contacts
CAS Number: 131-52-2
UN Number: 3155
Product Description: White to yellowish solid or powder, distinctive phenolic odor
Hazard Class: Acute toxicity (oral, dermal, inhalation), skin corrosion/irritation, serious eye damage/eye irritation, specific target organ toxicity
Pictograms: Skull and crossbones, Corrosive, Exclamation mark, Environment
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage, fatal if inhaled or swallowed, suspected carcinogen, very toxic to aquatic life
Precautionary Statements: Do not breathe dust, wash exposed skin, avoid release to the environment, wear protective clothing, eye, face and respiratory protection
NFPA Ratings: Health: 4; Flammability: 0; Reactivity: 1
Potential Health Effects: Heavy exposure brings headache, dizziness, burns, nausea, liver/kidney damage, possible unconsciousness or death from organ failure
Chemical Name: Sodium Pentachlorophenoxide
Chemical Formula: C6Cl5ONa
CAS Number: 131-52-2
Weight %: 97–100% (may contain trace water)
Impurities: Pentachlorophenol, sodium chloride, moisture
Other Ingredients: None listed beyond trace impurities that can form by decomposition
Inhalation: Remove exposed individual to fresh air, keep warm and still, rescue breathing as needed, oxygen if available, immediate medical attention crucial
Skin Contact: Remove contaminated clothing, wash with soap and water for at least 15 minutes, monitor for symptoms, seek urgent doctor care
Eye Contact: Flush eyes gently and thoroughly with water for 20 minutes lifting lids, avoid direct hand contact, transport to ER
Ingestion: Do not induce vomiting, rinse mouth thoroughly with water, never give anything by mouth if unconscious, transport to medical facility without delay
Notes to Physician: Symptoms may be delayed, monitor for systemic effects, treat symptomatically, activated charcoal possible
Suitable Extinguishing Media: Water spray, dry chemical, alcohol-resistant foam, carbon dioxide
Unsuitable Media: Avoid direct water stream, can spread product
Hazardous Combustion Products: Releases toxic fumes including HCl, sodium oxides, dioxins, phosgene, carbon monoxide, carbon dioxide
Protective Equipment: Self-contained breathing apparatus (SCBA), full turnout gear
Special Hazards: Dust can form explosive mixture in air, runoff can pollute waterways
Fire-Fight Procedures: Isolate area, contain runoff, cool containers with flooding amounts of water, evacuate unnecessary personnel, keep upwind
Personal Precautions: Avoid inhalation of dust/vapors, ventilate area, wear full protective gear including goggles, gloves, respirator
Environmental Precautions: Stop leak if safe, prevent entry into drains/waterways/soil, notify authorities on large release
Methods for Containment: Dike for later disposal, use inert absorbents (sand, earth, vermiculite)
Clean-Up Procedures: Shovel solid into containers, wipe contaminated surfaces, clean tools and area with water and detergent, dispose in accordance with regulations, decontaminate area thoroughly
Precautions for Safe Handling: Handle in fume hood or well-ventilated area, avoid dust generation, dedicated tools only, avoid direct skin and eye exposure, proper training required
Storage Conditions: Cool dry area, away from incompatible chemicals (acids, oxidizers, reducing agents), sealed containers clearly labeled and locked up, segregate from food products
Packaging Materials: High-density polyethylene or glass preferred, corrosion-resistant
Hygiene Practices: No eating, drinking, smoking nearby, wash hands thoroughly after use, contaminated clothing laundered before reuse
Occupational Exposure Limits: OSHA, NIOSH, and ACGIH limit: 0.5 mg/m³ for pentachlorophenol as related compound
Engineering Controls: Local exhaust ventilation, enclosed systems, air monitoring, spill containment plans
Eye Protection: Chemical splash goggles and face shield
Hand Protection: Nitrile or neoprene gloves, double-gloving for long exposure
Skin Protection: Full-body chemical-resistant clothing, rubber boots
Respiratory Protection: Approved NIOSH/MSHA respirator with organic vapor cartridge, P100 filter if airborne dust possible, supplied-air respirator for high-risk tasks
Other Measures: Emergency eyewash and shower stations accessible, regular PPE inspection
Appearance: White to yellow crystalline powder
Odor: Strong medicinal, phenolic
Odor Threshold: Not determined
pH: Strongly alkaline in solution
Melting Point: Decomposes above 170°C
Boiling Point: Not applicable (decomposes)
Flash Point: Not flammable
Evaporation Rate: Not volatile
Flammability: Not easily ignited, dust has explosion risk
Vapor Pressure: Low, negligible at room temp
Vapor Density: Not volatile
Solubility in Water: Readily soluble
Partition Coefficient: log Kow around 5 (very bioaccumulative)
Auto-Ignition Temp: Not self-igniting
Decomposition Products: Releases chlorinated organics, dioxins
Chemical Stability: Stable under recommended conditions
Conditions to Avoid: Moisture, high temperature, acid contact, open flames
Incompatible Materials: Strong acids (forms pentachlorophenol vapor), oxidizers, reducing agents, strong bases, halogenated compounds
Hazardous Decomposition: Hydrochloric acid, dioxins/furans, sodium oxides, chlorophenols
Reactivity: Strongly reacts with acids, oxidizers
Acute Toxicity: LD50 (oral, rat): 25–50 mg/kg; highly toxic, deaths documented from accidental and occupational exposure
Skin Corrosion/Irritation: Severe burns, blisters, chronic dermatitis, absorption through skin possible
Eye Damage/Irritation: Permanent injury, vision loss, severe pain
Sensitization: Respiratory and skin sensitizer in some exposed workers
Chronic Toxicity: Cancer risk, organ damage (liver, kidneys, CNS), blood disorders, reproductive risks
Carcinogenicity: Possible human carcinogen, IARC listed "possibly carcinogenic to humans"
Mutagenicity: Evidence of genetic damage in lab studies
Reproductive Toxicity: Associated with infertility, fetal effects in animal models
Other Effects: Hyperthermia, coma, death in severe poisoning
Symptoms: Fatigue, nausea, muscle pain, sweating, confusion, renal/liver impairment
Ecotoxicity: Poisonous to fish (LC50 around 0.01–0.2 mg/L acute), algae, aquatic invertebrates, birds, and mammals
Persistence/Degradability: Persistent, breaks down slowly; forms more toxic intermediates
Bioaccumulation: Builds up in wildlife and food chains (high log Kow), toxic to predators and humans through biomagnification
Mobility in Soil: Moderately to highly mobile depending on pH and organic content
Other Hazards: Contaminates water, sediment and can persist for decades
Other Environmental Information: Breakdown can form dioxins, posing long-term risks to humans and ecosystems
Waste Treatment Methods: Incinerate in approved facility with off-gas scrubber, solid hazardous waste landfill if permitted, small quantities neutralized with acid and destroyed
Do Not Dispose: In sewage, regular waste, storm drains, groundwater, open burning
Safe Handling for Disposal: Packaging should be sealed, labeled hazardous material; clean containers remain a hazard until properly decontaminated
EPA Hazardous Waste Number: U219 (under pentachlorophenol listing)
Residues/Unused Products: Treat as hazardous, avoid reuse or recycling
UN Number: 3155
Proper Shipping Name: Pentachlorophenol, sodium salt
Hazard Class: 6.1 (Toxic substances)
Packing Group: I (great danger)
Labels Required: Toxic, Marine pollutant
Transport by Ground (ADR/RID): Regulated as poison
Marine Transport (IMDG): Environmentally hazardous, marine pollutant
Air Transport (IATA): Must ship as poisonous substance, all containers sealed and leakproof
Special Transport Precautions: Avoid breakage, limit exposure, emergency response required for spills
OSHA: Listed as hazardous substance
TSCA: Registered; use restricted, subject to record-keeping, periodic inspections, and reporting
SARA Title III: Extremely hazardous, reportable under Sections 302, 304, and 313
RCRA: Listed as hazardous waste (U219), strict controls on disposal
CERCLA: Report spills/releases above reportable quantity
IARC/NTP: Possible carcinogen
Other Country Regulations: EU REACH: SVHC (Substance of Very High Concern), Australia, Canada, and Japan: Use and import controls, strict labeling and storage, permitted only for lab/industrial use
Supplier/Workplace Restrictions: Only trained, authorized personnel may access and handle; must keep MSDS up to date and readily available onsite
