Product Name: 2,5-Diaminobenzenesulphonic Acid
Synonyms: 2,5-Benzenediamine-1-sulfonic acid, Sulfanilic acid derivative
Chemical Formula: C6H8N2O3S
CAS Number: 88-63-1
Intended Use: Dye intermediate, laboratory reagents, colorant manufacturing
Manufacturer Information: Typically listed by chemical suppliers, requires current contact details for emergencies
Emergency Contact: National chemical emergency lines or supplier contact number for immediate response
Recommended Restrictions: Industrial use only, keep away from food preparation or medical applications
Classification: Eye irritation, Category 2; Skin sensitization, Category 1; Acute toxicity, Category 4 (oral and dermal)
Hazard Statements: May cause irritation to eyes and skin, harmful if swallowed, potential respiratory discomfort if dust is inhaled
Pictograms: Exclamation mark for irritation and acute toxicity
Signal Word: Warning
Precautionary Statements: Wear gloves, protective eyewear, avoid breathing dust, wash hands thoroughly after handling
Hazard Routes: Skin contact, inhalation, ingestion, eye exposure
Potential Health Symptoms: Redness, itching, burning sensation on skin and eyes, digestive discomfort if swallowed
Chemical Identity: 2,5-Diaminobenzenesulphonic Acid
Concentration: Pure (typically above 98%); minor impurities vary with production process
Ingredient Disclosure: Contains no major stabilizers, additives, carriers, or hazardous contaminants identified at levels triggering reporting
Molecular Weight: 188.21 g/mol
Other Components: Residual water, trace organic impurities possible due to synthesis or storage
Inhalation: Move person into fresh air, seek medical attention if discomfort persists or breathing becomes difficult
Skin Contact: Wash skin immediately with soap and plenty of water, remove contaminated clothing, seek medical care for persistent irritation
Eye Contact: Rinse cautiously with clean water for several minutes, lift upper and lower eyelids, remove contact lenses if present, seek medical attention for ongoing irritation
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical attention
Note for Physician: No specific antidote known, treat supportively and monitor for allergic response or delayed reaction
Suitable Extinguishing Media: Water spray, dry chemical powder, carbon dioxide
Unsuitable Extinguishing Media: Strong water jets may spread product dust
Fire Hazards: Product is not highly flammable but may burn if exposed to high temperatures; combustion can release nitrogen oxides, sulfur oxides, and ammonia
Protective Equipment for Firefighters: Self-contained breathing apparatus, full protective gear
Specific Methods: Cool containers exposed to fire with water spray, prevent run-off from fire control from entering water sources
Personal Precautions: Wear chemical-resistant gloves, goggles, approved respirator to prevent exposure
Environmental Precautions: Prevent entry into drains, surface water, and soil
Containment Methods: Stop leak if safe to do so, use inert absorbent materials for containment
Cleanup Procedures: Sweep or scoop up spills, place in labeled containers for disposal, wash spill area with water, ventilate enclosed spaces
Disposal: Collect waste material for proper disposal as specified by local regulations
Handling: Use only in well-ventilated areas, avoid creating dust, wear personal protective equipment at all times, avoid unnecessary contact with product
Storage Conditions: Store in cool, dry place away from sunlight and incompatible substances, keep containers tightly closed when not in use
Incompatible Materials: Strong oxidizers, acids, bases; avoid moisture exposure
Special Provisions: Segregate from food, animal feed in storage; ensure labeling and secondary containment
Packaging Materials: Use containers of polyethylene, glass, or metal with chemical resistance, check regularly for leaks or damage
Engineering Controls: Use local exhaust ventilation to minimize airborne exposure, provide eyewash stations and safety showers
Exposure Limits: No specific occupational exposure limits set, use general dust limits (ACGIH TLV for nuisance particulates)
Personal Protection: Chemical-resistant gloves, safety goggles or face shield, laboratory coat, approved respirator for dust
Hygiene Practices: Wash hands and face before breaks and after handling, do not eat or drink in work area
Environmental Exposure Control: Take steps to prevent release to environment, monitor air quality if handling large quantities
Appearance: White to off-white crystalline powder
Odor: Odorless
pH (1% solution): 2.0 – 3.0
Melting Point: 250–270°C (decomposes)
Boiling Point: Not applicable (decomposes before boiling)
Solubility: Soluble in water, sparingly soluble in alcohol
Vapor Pressure: Negligible at room temperature
Density: Approx. 1.4 g/cm³
Partition Coefficient: Log Pow not established
Flash Point: Not flammable under standard conditions
Other Data: Stable in original packaging, avoid strong thermal or chemical stress
Chemical Stability: Stable under standard temperature and pressure, maintains integrity in sealed packaging
Reactivity: Slow reaction rate with most organic materials, reacts with strong acids, bases, and oxidizers
Hazardous Reactions: Decomposition at high temperature produces toxic fumes (SOx, NOx, ammonia)
Conditions to Avoid: Prolonged exposure to heat, open flames, direct sunlight, moisture
Hazardous Decomposition Products: Sulfur oxides, nitrogen oxides, ammonia, carbon monoxide
Acute Toxicity: LD50 oral (rat): approx. 300–2000 mg/kg depending on purity
Skin Corrosion/Irritation: Causes skin irritation at prolonged or repeated contact
Serious Eye Damage/Irritation: Causes moderate eye irritation
Respiratory Sensitization: May cause respiratory discomfort if inhaled, no chronic effects reported
Skin Sensitization: Known skin sensitizer, possible allergic reactions
Long-Term Effects: Not identified as carcinogenic or mutagenic in available animal studies, chronic exposure data limited
Other Data: Handle with caution if individual exhibits previous sensitivity to sulfonic acid derivatives
Aquatic Toxicity: Data suggest possible toxicity to fish and invertebrates at high concentrations
Persistence and Degradability: Moderate persistence in soil and water, not rapidly biodegradable
Bioaccumulation Potential: Low, based on water solubility and predicted log Pow
Soil Mobility: Product shows moderate mobility in moist soil
Additional Environmental Data: Avoid release to environment, significant discharges may pose hazard to aquatic life
Waste Treatment Methods: Dispose through licensed hazardous waste contractor
Product Disposal: Incinerate or landfill in accordance with local, regional, national regulations
Contaminated Packaging: Rinse thoroughly before recycling or disposal, handle as hazardous waste if contaminated
Sewage Disposal: Prohibited, do not allow to enter public waterways
Regulatory Compliance: Obtain local authority guidance to select method in line with chemical waste regulations
UN Number: Not classified as hazardous for transport
Proper Shipping Name: 2,5-Diaminobenzenesulphonic Acid
ADR/RID Class: Non-regulated
IMDG/IATA Class: Not classified under these regulations
Packing Group: Not assigned
Transportation Notes: Secure packaging to prevent leaks and spills, keep away from incompatible substances during transport
Special Precautions: Label containers clearly, provide proper documentation during transit
TSCA Inventory: Listed
REACH Registration: Registered or exempted, check with supplier for current status
OSHA Hazards: Classified as hazardous substance
SARA 313: Not listed as a reportable toxic chemical
DSL/NDSL (Canada): Present
Labeling Requirements: Hazard pictograms, warning statements according to GHS
Other Regulations: Conforms to EU, US, international regulations for chemical substances; confirm local requirements before use
