Product Name: 2,4-Dichlorophenol
Chemical Name: 2,4-Dichlorophenol
Chemical Formula: C6H4Cl2O
CAS Number: 120-83-2
Synonyms: 2,4-DCP, 1-Hydroxy-2,4-dichlorobenzene
Recommended Use: Intermediate in organic synthesis, production of herbicides, wood preservatives
Manufacturer’s Details: Refer to container or shipping label for specific supplier or distributor contact
Emergency Contact Number: Refer to manufacturer information or Chemtrec for emergency support
UN Number: 2764
Hazard Classification: Acute Toxicity (Oral, Skin, Inhalation) Category 3, Skin Irritation Category 2, Serious Eye Damage Category 1, Aquatic Acute Hazard Category 1
Signal Word: Danger
Hazard Statements: Toxic if swallowed, by skin contact or if inhaled; causes severe skin burns and serious eye damage; very toxic to aquatic life
Pictograms: Skull and crossbones, corrosion, exclamation mark, environment
Precautionary Statements: Avoid all contact, wear protective gear, avoid exposure to environment, wash thoroughly after handling, avoid breathing dust or fumes
Chemical Composition: 2,4-Dichlorophenol 98–100% by weight
Impurities: Possible trace amounts of other chlorinated phenols and solvents—impurities present vary, but typically under 2%
Other Components: None regarded as hazardous based on available information
Inhalation: Move the affected person to fresh air. Monitor breathing. Seek medical attention if symptoms like coughing or difficulty breathing develop.
Skin Contact: Remove contaminated clothing. Wash skin with plenty of water and soap for at least 15 minutes. Call a doctor if irritation or redness develops.
Eye Contact: Rinse eyes with clean running water for at least 15 minutes, lifting upper and lower eyelids. Seek urgent medical help even if symptoms improve.
Ingestion: Do not induce vomiting. Rinse mouth thoroughly with water if subject is conscious. Provide immediate medical attention. Give nothing by mouth to an unconscious person.
Suitable Extinguishing Media: Water spray, dry chemical, foam, or carbon dioxide
Unsuitable Media: Avoid direct use of water jet
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, hydrogen chloride, phosgene, chlorinated organic vapors
Protective Equipment for Firefighters: Self-contained breathing apparatus, full protective gear; avoid inhalation of smoke or fumes
Special Hazards: Heating or fire may release toxic and irritant vapors—avoid breathing emitted gases
Personal Precautions: Wear proper chemical-resistant PPE, including gloves, protective eyewear, and respirator
Environmental Precautions: Prevent entry into waterways, drains, sewers; contain spillage with sand, earth, or appropriate absorbent
Containment and Clean-up: Collect spilled material mechanically or by vacuum, place in labeled container for disposal. Wash contaminated area with detergent and water, avoiding further runoff. Ventilate area as toxic vapors can persist.
Handling: Avoid creating dust, inhalation of vapors or fumes, and skin or eye contact. Use only with appropriate exhaust ventilation. Do not eat, drink, or smoke while using.
Storage Conditions: Keep container tightly sealed in a cool, dry, well-ventilated place. Store away from foodstuffs, water sources, acids, and oxidizers.
Specific Precautions: Store in original container, protect from physical damage and moisture, keep away from sunlight and incompatible chemicals
Occupational Exposure Limits: OSHA PEL: Not established, ACGIH TLV: 1 ppm (skin), NIOSH REL: 1 ppm (skin)
Engineering Controls: Local exhaust ventilation, fume hood
Personal Protective Equipment: Chemical resistant gloves (nitrile, neoprene), safety goggles or face shield, long-sleeved protective clothing, approved respirator for dust/vapor, closed shoes or boots
Hygiene Measures: Wash thoroughly after handling; remove and launder contaminated clothing before reuse
Appearance: White to pale yellow solid, crystalline powder or flakes
Odor: Pungent, medicinal phenol-like
Odor Threshold: Not established
pH (1% solution): 5.0–6.5
Melting Point: 41–44°C
Boiling Point: 210–215°C
Flash Point: 111°C (closed cup, approximate)
Evaporation Rate: Not established
Flammability: Combustible in presence of heat or flame
Explosive Limits: Not established
Vapor Pressure: 0.12 mmHg at 25°C
Vapor Density: 5.9 (air = 1)
Density: 1.38 g/cm³
Solubility in Water: 4.65 g/L at 20°C
Partition Coefficient (Log Kow): 3.06
Decomposition Temperature: Not established
Chemical Stability: Stable under normal conditions as a solid; degrades in sunlight or at higher temperatures
Hazardous Reactions: Reacts with strong bases and oxidizers, may form explosive mixtures
Conditions to Avoid: Strong heat, direct sunlight, moisture, incompatible materials
Incompatible Materials: Alkaline substances, oxidizing agents, acid chlorides, acid anhydrides
Hazardous Decomposition Products: Hydrogen chloride, toxic phenolic vapors, chlorinated organics
Acute Toxicity: LD50 Oral (rat): 580 mg/kg; LD50 Dermal (rabbit): 670 mg/kg
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Possible Effects: Toxic if swallowed, inhaled, or absorbed; skin burns, severe eye damage, respiratory tract irritation; risk of systemic toxicity
Chronic Effects: Possible cumulative effects with repeated exposure; liver and kidney damage observed in animal studies
Carcinogenicity: Not listed as carcinogen by OSHA, NTP, IARC
Mutagenicity: Some studies indicate mutagenic potential
Other Health Information: Not known to cause reproductive toxicity or teratogenic effects in tested populations
Aquatic Toxicity: Very toxic to aquatic species; LC50 (fish, 96h): 2.1 mg/L; EC50 (Daphnia, 48h): 3.5 mg/L
Persistence and Degradability: Persists in soil and water, moderate biodegradation; breaks down under sunlight but can linger in groundwater
Bioaccumulative Potential: Moderate potential (log Kow 3.06); risk of bioaccumulation in aquatic life
Mobility in Soil: Moderately mobile, can leach into subsurface water
Other Adverse Effects: May disrupt microbial and plant communities; toxicity concern for non-target organisms close to point of use or spill
Waste Treatment Methods: Incinerate under controlled conditions by a licensed chemical disposal contractor
Contaminated Packaging: Empty containers and residues must be handled as hazardous waste; dispose according to local and national hazardous waste regulations
Sewage Disposal: Prohibited from direct discharge to sewers, surface water, or into soils
Precautions for Disposal: Avoid environmental contamination; handle with gloves and protective clothing during waste handling
UN Number: 2764
Proper Shipping Name: Chlorophenols, solid
Transport Hazard Class: 6.1 (Poisonous substances)
Packing Group: II
Environmental Hazards: Marine pollutant
Special Precautions for User: Use appropriate containment to avoid leakage, confirm labeling and placarding meet regulatory requirements, do not transport with incompatible substances
US OSHA: Classified as hazardous, covered by Hazard Communication Standard
SARA Title III Sections 302/304/311/312/313: Listed, subject to reporting requirements (toxic release inventory)
TSCA: Listed in US TSCA Chemical Inventory
REACH (EU): Subject to registration; harmonized classification
Canada WHMIS: Classified as Toxic and Corrosive Material
Other International Controls: Covered by various country-specific chemical inventories and environmental protection standards
Labeling Requirements: Wear appropriate PPE, include hazard pictograms, and follow workplace safety communications
