Product Name: Para Amino Azo Benzene 4 Sulfonic Acid
Synonyms: 4-Aminoazobenzene-4'-sulfonic acid, p-Aminoazobenzene p'-sulphonic acid
Chemical Formula: C12H11N3O3S
CAS Number: 97-22-9
Recommended Use: Dye intermediate, chemical synthesis
Supplier: Chemical manufacturer or distributor information (with phone numbers for emergencies)
Emergency Phone: Local emergency services, supplier emergency contact
GHS Classification: Acute toxicity (oral, dermal), Skin sensitization, Eye irritation
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin and eye irritation, suspected carcinogen, possible allergic skin reactions
Precautionary Statements: Avoid inhalation, wear protective clothing, wash thoroughly after handling, do not eat or drink while using, seek medical advice if symptoms occur
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Symptoms: Irritation of skin, eyes, respiratory system, possible allergic reactions, nausea, headache
Chemical Name: Para Amino Azo Benzene 4 Sulfonic Acid
Common Name: Paabsa
CAS Number: 97-22-9
Concentration: Greater than 98% pure
Impurities: Trace amounts of unreacted starting materials, sodium chloride from processing
Molecular Weight: 277.30 g/mol
Inhalation: Move person to fresh air right away. Loosen tight clothing, keep person warm and at rest. Seek medical help if symptoms develop or persist.
Skin Contact: Immediately remove contaminated clothing. Rinse skin with soap and plenty of water for at least 15 minutes. Get medical advice if irritation develops.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. See a medical professional if irritation does not stop.
Ingestion: Rinse mouth thoroughly with water. Never give anything by mouth to an unconscious person. Do not induce vomiting. Call a poison center or doctor.
Other First Aid: Wash contaminated clothing before reuse. Provide symptomatic relief and ongoing observation if effects are delayed.
Suitable Extinguishing Media: Use water spray, dry chemical powder, foam, or carbon dioxide for small fires
Unsuitable Extinguishing Media: High-volume jets of water
Specific Hazards: Thermal decomposition releases toxic fumes including sulfur oxides, nitrogen oxides, and carbon monoxide
Protective Equipment: Firefighters use self-contained breathing apparatus, full protective suit
Special Procedures: Move containers away from fire if safe. Cool exposed drums with water spray. Prevent runoff from entering drains.
Personal Precautions: Wear gloves, chemical splash goggles, dust respirator, protective clothing. Avoid inhalation and contact.
Environmental Precautions: Prevent spillage from entering drains, surface or ground water, or soil
Methods for Containment: Stop leak if it is safe. Dike area with sand or earth for large spills.
Cleaning Up: Sweep or shovel up spilled material and place it in a closed, labeled container for proper disposal. Wash area with plenty of water.
Avoidance: Minimize dust generation and prevent further leakage or spillage.
Handling: Operate with adequate ventilation. Avoid contact with skin, eyes, and clothing. Do not breathe dust. Handle in accordance with good chemical hygiene practices.
Storage Conditions: Store in a tightly closed container in a cool, dry, well-ventilated place
Incompatible Materials: Strong oxidizers, strong acids, reactive metals
Safe Storage Advice: Keep separated from food and drink. Protect from light and excessive heat. Keep away from sources of ignition.
Occupational Exposure Limits: No specific limits established for Paabsa; limit exposure to minimize risk
Engineering Controls: Work in a chemical fume hood, or with local exhaust ventilation
Respiratory Protection: Use NIOSH-approved dust mask or respirator
Skin Protection: Chemical-resistant gloves such as nitrile, long sleeved lab coat, coveralls
Eye Protection: Safety goggles or face shield
Other Protective Measures: Emergency eyewash and safety shower available in immediate work area. Remove contaminated clothing promptly.
Appearance: Orange to brown crystalline powder
Odor: No significant odor
Odor Threshold: Not determined
pH (1% solution): Approximately 4-6
Melting Point: Decomposes above 300°C
Boiling Point: Not applicable (decomposes)
Flash Point: Not flammable
Solubility: Soluble in water
Vapor Pressure: Not determined
Density: 1.45-1.55 g/cm³
Partition Coefficient: Not available
Autoignition Temperature: Not determined
Evaporation Rate: Not applicable
Explosive Properties: Not classified as explosive
Chemical Stability: Stable under recommended storage conditions
Reactivity: Non-reactive under normal handling and use
Possible Hazardous Reactions: May react with strong oxidizing agents, acids
Hazardous Decomposition: Emits sulfur oxides, nitrogen oxides, and carbon oxides under fire or thermal decomposition
Conditions to Avoid: Heat, open flame, direct sunlight, incompatible chemicals
Polymerization: Does not occur
Acute Toxicity: Harmful if swallowed or inhaled, may cause moderate irritation to skin and eyes
Chronic Toxicity: Prolonged or repeated contact can lead to dermatitis and possible sensitization reactions
Carcinogenicity: Some azo compounds have shown carcinogenic potential; Paabsa suspected carcinogen (IARC classification not available)
Mutagenicity: Some related azo dyes show mutagenic effects
Reproductive Toxicity: Not established for this compound
Routes of Exposure: Ingestion, inhalation, skin contact, eye contact
Symptoms: Nausea, vomiting, headache, allergic reactions, rashes, coughing, temporary vision effects
Target Organs: Skin, eyes, respiratory system, liver as reported for related compounds
Ecotoxicity: Harmful to aquatic organisms, potential for long-term effects in aquatic environments
Persistence and Degradability: Moderately persistent, does not rapidly degrade in environment
Bioaccumulation Potential: May accumulate in aquatic organisms
Mobility in Soil: Soluble in water, can migrate in soil and leach into groundwater
Other Adverse Effects: Discoloration of waterways, oxygen depletion risk in water due to microbial degradation
Disposal Procedures: Dispose as hazardous chemical waste, following local, regional, and national regulations. Use licensed chemical waste contractor.
Container Disposal: Completely empty containers before disposal, rinse with water if required. Do not reuse containers.
Environmental Precautions: Prevent material from entering sewers, drains, or watercourses. Do not dispose with general waste.
Additional Advice: Incineration recommended under controlled conditions with proper emission controls
UN Number: Not regulated as dangerous good for transport
Proper Shipping Name: Chemical, n.o.s. (Para Amino Azo Benzene 4 Sulfonic Acid)
Transport Hazard Class: Not classified
Packing Group: Not applicable
Environmental Hazards: Avoid release to the environment, inform transport handlers about precautions
U.S. TSCA Status: Listed on the TSCA inventory
EU Reach Status: Registered or pre-registered under REACH as applicable
SARA Title III: Not listed as an extremely hazardous substance
California Proposition 65: Not specifically listed
Labelling Requirements: Label packages clearly with appropriate hazard symbols and statements. Maintain SDS accessible for users and handlers.
Other Regulations: Subject to chemical control regulations in most regions, compliance with workplace safety laws necessary
