Product Name: C-Acid (Clt Acid), 2-Amino-5-Chloro Toluene Sulfonic Acid, 2-Amino-4-Methyl-5-Chloro Benzene Sulfonic Acid
Chemical Formula: C7H8ClNO3S
Molecular Weight: 221.65 g/mol
Common Synonyms: Clt Acid, 2-Amino-5-Chloro-m-Toluene Sulfonic Acid
CAS Number: 88-51-7
Recommended Use: Intermediate in dye and pigment manufacture
Supplier Contact Information: Manufacturer’s name, business address, phone number for emergencies, email for technical data, responsible person’s name, company logo
Classification: Acute Toxicity (Oral, Dermal, Inhalation), Eye Irritant, Skin Sensitization
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes eye and mild skin irritation, may cause allergic skin reaction, harmful to aquatic life
Pictogram: Exclamation mark
Precautionary Statements: Avoid contact with skin and eyes, wash hands thoroughly after handling, wear suitable protective equipment, avoid release to environment
Chemical Name: 2-Amino-5-Chloro Toluene Sulfonic Acid / 2-Amino-4-Methyl-5-Chloro Benzene Sulfonic Acid
Concentration (%): ≥98%
Impurities: Moisture (<1%), trace organic and inorganic residues from synthesis
Additives: None
Other Components: No hazardous additives present above threshold limits
Inhalation: Remove person to fresh air, keep comfortable for breathing, seek medical advice if symptoms occur
Skin Contact: Wash with plenty of water and mild soap, remove contaminated clothing, if irritation persists get medical attention
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, continue irrigating, seek medical help
Ingestion: Rinse mouth, do not induce vomiting, call a poison control center or physician immediately
Most Important Symptoms: Eye redness, skin rash or sensitization, throat irritation if inhaled
Extinguishing Media: Dry chemical powder, foam, CO2, use water spray for cooling tanks and containers
Unsuitable Extinguishing Media: Direct water jet may spread the material
Hazardous Combustion Products: Emits toxic fumes of nitrogen oxides, sulfur oxides, hydrochloric acid, organic vapors
Special Fire Fighting Procedures: Use self-contained breathing apparatus, full protective clothing
Advice for Firefighters: Move containers from fire area if safe, keep area cordoned, stay upwind
Explosion Data: Not known to be explosive under normal handling but dust may form combustible mixtures in air
Personal Precautions: Wear chemical-resistant gloves, eye protection, disposable mask or respirator as appropriate for dust
Environmental Precautions: Prevent spillage from entering drains, sewers, or waterways
Methods for Cleanup: Sweep up with minimum dust generation, transfer to sealed containers for disposal, ventilate affected area, wash spill site after removal
Other Recommendations: Avoid creating airborne dust, provide adequate ventilation
Safe Handling Advice: Handle in well-ventilated place, avoid breathing dust, avoid contact with skin, eyes and clothing, wash hands after use
Storage Conditions: Store in tightly closed containers, in a cool, dry, well-ventilated place, out of direct sunlight
Incompatible Materials: Strong oxidizers, reducing agents, acids, bases, moisture
Storage Temperature: Room temperature, do not freeze or overheat
General Hygiene: Prohibit eating, drinking, smoking in work area, use dedicated tools
Occupational Exposure Limit: Not established for this specific substance
Engineering Controls: Closed process systems, local exhaust ventilation to minimize airborne concentrations
Personal Protective Equipment: Safety goggles, chemical-resistant gloves (nitrile or neoprene), dust mask (N95/P2), protective lab coat or apron
Hygiene Measures: Remove and wash contaminated clothing before reuse, do not eat or drink while using
Environmental Exposure Controls: Implement spill containment measures, properly label and manage waste streams
Appearance: Off-white to light brown powder
Odor: Odorless or very faint amine-like smell
Melting Point: 183–188°C
Solubility: Slightly soluble in water, sparingly soluble in organic solvents
pH (1% solution): 3.5–5.0
Boiling Point: Decomposes before boiling
Density: 1.46–1.50 g/cm³
Vapor Pressure: Not applicable at room temperature
Partition Coefficient (Log Kow): Not available
Evaporation Rate: Not volatile
Other Properties: Stable under normal conditions, may release corrosive fumes if heated strongly
Chemical Stability: Chemically stable in standard storage and handling
Reactive With: Strong oxidizing agents, reducing agents, strong acids and bases, moisture in high concentration
Hazardous Decomposition Products: Sulfur oxides, nitrogen oxides, hydrogen chloride, organic byproducts
Possibility of Hazardous Reactions: None expected under recommended handling, avoid excessive heat, incompatible materials
Conditions to Avoid: High temperatures, open flames, direct exposure to moisture
Polymerization: Does not occur
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Oral LD50 (Rat): >2000 mg/kg; Dermal LD50: Data not available; Inhalation LC50: Data not available
Potential Effects: Irritation to eyes, skin, mucous membranes, respiratory tract, potential skin sensitizer
Chronic Toxicity: Not classified as carcinogenic, mutagenic, or teratogenic by international agencies
Symptoms: Redness, itching, rash on skin, eye discomfort, coughing, sore throat if inhaled
Other Data: No evidence of systemic toxicity from short-term exposure, potential long-term effects not fully documented
Aquatic Toxicity: Harmful to fish and aquatic invertebrates at moderate concentrations, low potential for bioaccumulation
Persistence: Limited biodegradability in aquatic and soil environments, may persist in sediments
Mobility: Low due to strong absorption to organic matter and limited water solubility
Environmental Fate: Breakdown products may be more toxic, avoid uncontrolled release to environment
Other Effects: Not known to cause significant effects in birds, mammals, or plants at environmental concentrations
Waste Disposal: Handle as hazardous chemical waste, collect residue in suitable labeled container, dispose via licensed chemical disposal contractor
Method: Incineration or chemical treatment compatible with local and international regulations, do not dump in drains or public water bodies
Container Disposal: Triple rinse then send for local recycling or landfill depending on regulations
Precautions: Use certified personnel for all waste handling, keep detailed records of waste volumes and routes
UN Number: Not classified as a dangerous good for transport by most agencies
Transport Hazard Class: None for ground, sea, or air
Packing Group: Not regulated
Proper Shipping Name: Not specifically listed, refer to product description
Transport Precautions: Protect from moisture, excessive heat, and direct sunlight, use sealed packaging, secure loads to prevent movement, label with product and hazard information
Regulatory Listing: C-Acid not specifically listed on major hazardous substance inventories (TSCA, EINECS, DSL), check local, national inventories
Labeling Requirements: Comply with OSHA HCS, GHS, REACH obligations as appropriate
Workplace Standards: Follow applicable country and industrial guidelines for use, storage, worker training, worker protection
Restriction Status: Not subject to specific restrictions, but enforce risk management according to occupational exposure and environmental protection laws
Other Regulatory Data: Safety assessment and hazard classification subject to continuous regulatory review, review SDS updates routinely
