Product Name: 2,4-Dichloro-3,5-Xylenol
Chemical Formula: C8H8Cl2O
Synonyms: Dichloroxylenol, DCX, Para-dichloro-m-xylenol
CAS Number: 133-53-9
Recommended Use: Biocidal agent for disinfectants, antiseptics, and toiletries
Manufacturer Contact Info: Emergency phone support, product inquiries, safety coordination personnel, accessible links to regulatory updates, established office and facility addresses labeled for primary correspondence
Emergency Numbers: National Poison Control helpline, Environmental spill reporting contact
Classification (GHS): Acute Toxicity (Oral) Category 4, Skin Irritation Category 2, Eye Irritation Category 2A, Hazardous to Aquatic Environment—Chronic Category 2
Signal Word: Warning
Hazard Pictograms: Exclamation mark, Environmental hazard warning
Hazard Statements: Harmful if swallowed, irritates skin, causes serious eye irritation, toxic to aquatic life with long-lasting effects
Precautionary Statements: Avoid inhalation of dust or aerosols, keep away from aquatic environments, wash thoroughly after handling, wear protective gloves and clothing, don’t eat or drink while handling
Chemical Identity: 2,4-Dichloro-3,5-xylenol
PURITY: Above 95% most commercial sources
Impurities: Traces of residual solvents, possible low levels of monochloroxylenol species, structurally related isomers
Concentration Ranges: Bulk substance or formulated blends, usually single component
General Guidance: Move affected person to fresh air, remove contaminated clothing immediately, prevent exposure to unprotected bystanders
Inhalation: Move person to fresh air, monitor for breathing difficulty, provide oxygen if required, see medical assistance for prolonged symptoms
Ingestion: Rinse mouth thoroughly, don’t induce vomiting unless prompted by medical staff, contact emergency services
Skin Contact: Rinse skin thoroughly with water, wash with mild soap, remove contaminated clothing and shoes
Eye Contact: Flush eyes with lukewarm water for 15 minutes, remove contact lenses if present, seek medical attention for persistent irritation
Notes for Physician: Symptomatic and supportive treatment, respiratory irritation observation, monitor for delayed effects from exposure
Suitable Extinguishing Media: Dry chemical powder, CO2, foam, or water spray for small fires, larger fires require firefighting foam
Specific Hazards: Combustion produces toxic fumes including hydrochloric acid, phosgene, and carbon oxides
Special Protective Equipment: Firefighters must use self-contained breathing apparatus and chemical-resistant protective clothing
Advice for Firefighters: Approach upwind, contain firewater runoff, avoid inhalation of thermal decomposition byproducts, evacuate area as necessary
Personal Precautions: Wear personal protective equipment to avoid skin and eye contact, respirators may be necessary if dust is present, avoid breathing aerosols
Environmental Precautions: Prevent spill from entering water bodies, sewer systems, or soil
Methods for Cleaning Up: Scoop or sweep solid material into proper disposal containers, wash residue from surfaces with copious water, use absorbent materials for liquid forms, ventilate area and decontaminate
Notification: Report significant releases to relevant authorities according to local environmental laws
Safe Handling: Wear chemical-resistant gloves and eye protection, handle in a well-ventilated area, use proper hygiene practices, keep food and drinks away from work area
Safe Storage: Store in original, tightly closed containers, segregated from incompatible substances like acids and oxidizers, cool dry place with good ventilation, avoid direct sunlight and temperatures above recommended storage range
Incompatibilities: Avoid joint storage with strong oxidizing agents, acids, ammonia
Occupational Exposure Limits: No specific regulatory limits, but minimize exposure as much as possible
Engineering Controls: Local exhaust ventilation, enclosed processes, eyewash stations, safety showers nearby
Personal Protective Equipment: Safety goggles, gloves (nitrile or neoprene), chemical-resistant overalls, respiratory protection for insufficient ventilation, avoid using textiles that absorb and retain the chemical
Hygiene Measures: Remove contaminated clothing immediately, wash hands and exposed skin after handling, avoid cross-contamination between work and break areas
Physical State: White to off-white crystalline powder
Odor: Faint phenolic odor, slightly medicinal
Molecular Weight: 191.06 g/mol
Melting Point: 110-114°C
Boiling Point: Decomposes before boiling
Solubility: Slightly soluble in water, easily soluble in ethanol, ether, and most organic solvents
Vapor Pressure: Low at ambient temperatures
Partition Coefficient (log Kow): 3.5-4 typical
Explosive Properties: Not explosive
Auto-Ignition Temperature: Not readily available, exceeds room temperature
pH (solution): Slightly acidic to neutral in dilute solution
Chemical Stability: Stable under typical storage conditions, protected from moisture and excessive heat
Reactivity: Reacts with strong acids and strong oxidizing agents, forming hazardous byproducts
Hazardous decomposition products: May produce hydrochloric acid vapors, carbon monoxide, carbon dioxide, and other chloro-phenol derivatives on decomposition
Polymerization: Doesn’t undergo hazardous polymerization
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Toxicity: LD50 oral (rat) ranges from 300-600 mg/kg, can irritate respiratory tract and digestive system
Skin Effects: Repeated or prolonged exposure can cause dermatitis, redness, and rash
Eye Effects: Can lead to pain, staining, and serious irritation
Chronic Effects: Extended high-level exposure may impact liver and kidney function, long-term studies in animals didn’t consistently show carcinogenic activity
Other Effects: Allergic response possible in hypersensitive individuals, possible central nervous system symptoms with excessive exposure
Aquatic Toxicity: Toxic to aquatic organisms, noted LC50 (96h, fish) about 0.13-0.68 mg/L, high potential for bioaccumulation in aquatic systems
Persistence and Degradability: Slow biodegradation rate under aerobic conditions
Bioconcentration: Shows affinity for sediment and aquatic life
Environmental Fate: Moderately mobile in soil, risk of groundwater contamination if released accidently
Other Effects: Low volatility reduces atmospheric spread, but disposal into surface water can impact fish and invertebrates for extended periods
Waste Treatment Methods: Incineration in equipped chemical waste facility, use only licensed waste handlers
Disposal of Containers: Triple rinse containers before recycling, destroy labels, puncture before landfill if allowed by local law
Precautions: Do not dump into sewers, water sources, or regular waste streams
Additional Info: Follow national, regional, and local waste management statutes, consult hazardous waste registry for additional requirements
UN Number: 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains 2,4-Dichloro-3,5-xylenol)
Transport Hazard Class: Class 9 (Miscellaneous Dangerous Substances and Articles)
Packing Group: III
Environmental Hazards: Substance presents marine pollutant risk
Special Precautions: Label shipments with environmental hazard pictograms, restrict exposure on transit vehicles, avoid temperature extremes on transit
Labeling Requirements: GHS-compliant symbols and safety statements mandated, hazard identification prominent
Inventory Listings: Listed under TSCA (US), REACH (EU), AICS (Australia), DSL (Canada), other regional chemical lists
Specific Regulations: Regulated for use as an active ingredient in disinfectant and personal care products, subject to restrictions in agricultural and aquatic applications
Worker Protection: Must follow OSHA/NIOSH or similar regional occupational safety standards for personal protection, exposure monitoring, and medical surveillance
Community Right-to-Know: Environmental release reportable under national environmental protection statutes, available to public in compliance with chemical safety laws
