© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: 2,4-Dichlorobenzoic Acid
Chemical Formula: C7H4Cl2O2
Other Names: Benzoic acid, 2,4-dichloro-
CAS Number: 50-84-0
Recommended Use: Intermediate in organic synthesis, used in laboratories and chemical manufacturing
Manufacturer Information: Name, address, and contact phone number specific to supplier
Emergency Contact: Local Poison Control Center, CHEMTREC or supplier’s emergency number
GHS Classification: Acute Toxicity (oral, dermal, inhalation), Eye Irritation, Skin Irritation
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin irritation, causes serious eye irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid contact with skin, eyes, and clothing, wash thoroughly after handling, do not eat, drink or smoke near material, wear protective gloves, eye protection
Chemical Name: 2,4-Dichlorobenzoic Acid
Synonyms: 2,4-DCBA
CAS No.: 50-84-0
Concentration: ≥98% (technical or pure grade)
Impurities: Trace levels of monochlorobenzoic acids, water, residual solvents depending on synthesis method
Inhalation: Remove individual to fresh air, seek medical attention if symptoms persist, offer oxygen if breathing problem detected
Skin Contact: Remove contaminated clothing, rinse skin with soap and water for 15 minutes, call a doctor for irritation or persistent redness
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, keep eyelids open, obtain medical attention if irritation continues
Ingestion: Rinse mouth, never give anything by mouth if person is unconscious, seek prompt medical attention, do not induce vomiting
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Specific Hazards: May emit toxic fumes such as HCl, CO, CO2 in fire, dust can form explosive mixtures with air
Protective Equipment: Full firefighter suit, NIOSH-approved self-contained breathing apparatus
Advice for Firefighters: Keep containers cool with water spray, use caution as material can melt and flow, contain runoff to prevent water pollution
Spill Response: Stop leak if safe, avoid dust generation, ventilate area
Personal Precautions: Use gloves, goggles, suitable protective clothing, avoid inhalation, wash hands after handling
Cleanup Methods: Collect mechanically, sweep up and shovel material, use inert absorbent for liquid traces
Environmental Precautions: Prevent product from entering drains, sewers, waterways, inform local authorities in case of large releases
Safe Handling: Avoid breathing dust, avoid contact with skin and eyes, use only in well-ventilated areas, keep containers closed
Storage: Store in cool, dry, well-ventilated areas, keep away from acids, oxidizers, moisture
Special Precautions: Use only with equipment constructed of corrosion-resistant materials, segregate from incompatible chemicals
Container Requirements: Use tightly sealed containers made of compatible material such as glass or HDPE
Engineering Controls: Use local exhaust ventilation or process enclosures, keep work area clean
Personal Protective Equipment: Chemical goggles, nitrile or neoprene gloves, lab coat or apron
Respiratory Protection: Approved dust mask or half-face respirator if dust likely
Exposure Limits: No established OSHA or ACGIH limits for 2,4-dichlorobenzoic acid, minimize exposure as a prudent practice
Hygiene Measures: Wash thoroughly after handling, remove contaminated clothes, do not eat or smoke during use
Appearance: White to off-white crystalline powder
Odor: Slight odor of chlorinated compounds
Odor Threshold: Not established
pH: Acidic in solution
Melting Point: 164-166°C
Boiling Point: Decomposes before boiling
Flash Point: Not applicable or above 100°C
Flammability: Non-flammable solid
Solubility: Slightly soluble in water, soluble in ethanol, ether
Vapor Pressure: Negligible at room temperature
Partition Coefficient (log Kow): Estimated 2.9–3.1
Decomposition Temperature: Above 180°C
Viscosity: Not relevant to solid material
Stability: Stable under recommended storage conditions
Hazardous Reactions: Reacts with strong oxidizers, reacts with strong bases
Decomposition Products: Produces hydrogen chloride, carbon dioxide, carbon monoxide upon thermal decomposition
Conditions to Avoid: Excessive heat, moisture, sources of ignition
Polymerization: No dangerous polymerization reported
Acute Toxicity: Oral LD50 (rat) 2,000–3,000 mg/kg, low acute toxicity
Skin Irritation: Causes skin irritation based on animal tests, redness, discomfort after contact
Eye Irritation: Causes serious irritation, redness, pain
Sensitization: Not classed as a skin sensitizer
Chronic Effects: Long-term exposure has not been well studied, precaution warranted
Mutagenicity: Not classified as mutagenic in standard tests
Target Organs: Not established, limits set as low as practical
Aquatic Toxicity: Moderately toxic to aquatic organisms, LC50 (fish, 96h) 7–30 mg/L
Persistence and Degradability: Not readily biodegradable, persists in environment
Bioaccumulation: Potential exists, log Kow >2.5 indicates risk for aquatic food chains
Mobility in Soil: Low mobility due to partial adsorption to soil particles
Other Adverse Effects: Harmful to aquatic flora and fauna, follow all environmental protection guidelines during disposal
Waste Treatment Methods: Dispose as hazardous waste following local, federal, and state regulations
Methods of Disposal: Incineration at licensed facility is preferred, avoid landfill where chemical leaching might occur
Container Disposal: Rinse thoroughly, offer clean container for recycling or dispose of as regulated chemical waste
Precautions: Do not release to environment
UN Number: Not regulated under UN Recommendations unless part of a formulated pesticide
Transport Hazard Class: Not classified as a hazardous material in most jurisdictions
Packing Group: Not assigned
Marine Pollutant: Classified as potentially hazardous to aquatic organisms
Special Precautions for Transport: Avoid spillage, keep in original packaging during transport, follow all applicable laws
TSCA: Listed in US Toxic Substances Control Act Inventory
EU REACH Status: Not registered in high tonnage band, observe restrictions on environmental discharges
SARA Title III: Not subject to specific reporting, but good practice to record any large-scale use or release
California Proposition 65: Not listed
Other National Inventories: Check local country requirements for specific restrictions or obligations (CAN, AUS, JP, etc.)
Labeling Requirements: GHS-compliant labeling with pictogram, hazard statements, supplier details
