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Product Name: Sodium 2-Diazo-1-Naphthol-4-Sulfonate
Chemical Formula: C10H6N2NaO3S
Synonyms: Naphthalenesulfonic acid, 2-diazo-1-naphthol-4-sulfonic acid sodium salt
Recommended Use: Photoresist production, chemical synthesis, photolithography applications
Supplier Details: Refer to SDS for supplier contact information, phone number, and email in case of emergency
Emergency Phone: Emergency response service or local poison center recommended for incidents
Classification: Eye irritation (Category 2), Skin irritation (Category 2), Sensitizer (Category 1), Specific target organ toxicity after single exposure (Category 3)
Label Elements: Exclamation mark pictogram, signal word Warning, hazard statements concerning skin and eye irritation, and respiratory tract irritation
Routes of Exposure: Inhalation, skin contact, eye contact
Potential Hazards: Irritation to eyes, skin, and respiratory system, possible allergic reactions on repeated exposure; decomposition may generate hazardous gases like nitrogen oxides and sulfur oxides
Chemical Name: Sodium 2-Diazo-1-Naphthol-4-Sulfonate
Concentration: >98% by weight (typically technical grade)
Impurities: Trace organic and inorganic process by-products, often minimal, supplier dependent
CAS Number: 6358-69-6
EC Number: 228-755-1
Inhalation: Move the affected person to fresh air; keep at rest in a position comfortable for breathing; seek medical attention for persistent symptoms such as coughing or difficulty breathing.
Skin Contact: Immediately remove contaminated clothing; rinse skin thoroughly with plenty of water and mild soap; seek medical advice if irritation or redness continues.
Eye Contact: Rinse cautiously with water for at least 20 minutes, holding eyelids apart to ensure thorough flushing; remove contact lenses if present and easy to do; consult a medical professional if discomfort persists.
Ingestion: Rinse mouth thoroughly; do not induce vomiting; give water to dilute only if the person is conscious and alert; seek immediate medical help.
Suitable Extinguishing Media: Use water spray, dry chemical powder, foam, or carbon dioxide as appropriate for surrounding materials.
Special Hazards: Toxic gases such as nitrogen oxides, carbon oxides, and sulfur oxides may be produced during combustion; thermal decomposition may liberate irritating vapors.
Protective Equipment: Firefighters should wear full protective clothing, including self-contained breathing apparatus.
Advice for Firefighters: Control run-off water from fire-fighting to prevent environmental contamination; keep containers cool by spraying with water.
Personal Precautions: Wear appropriate personal protective equipment including gloves, chemical-resistant goggles, and suitable respiratory protection; avoid dust formation.
Environmental Precautions: Prevent further leakage or spillage if safe to do so; avoid discharge into sewers, surface water, or soil.
Cleanup Methods: Gather spilled material using suitable absorbent (inert material such as vermiculite or sand), then collect and segregate in tightly sealed containers for disposal; ventilate the area and thoroughly clean contaminated surfaces.
Handling: Minimize dust creation; avoid contact with skin, eyes, and clothing; ensure adequate ventilation or local exhaust at work areas; wash hands thoroughly after handling to remove any residue.
Storage: Store in a cool, dry, and well-ventilated place; containers must be tightly closed and kept away from heat and moisture; segregate from incompatible substances such as strong acids, strong bases, and oxidizing agents.
Other Precautions: Ensure storage conditions minimize any risk of product decomposition or accidental release.
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to prevent airborne exposure above applicable limits.
Occupational Exposure Limits: No specific limits assigned; keep airborne concentrations as low as possible using engineering controls.
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety goggles, laboratory coat or apron, appropriate respiratory protection if dust or aerosols may occur.
Hygiene Measures: Wash hands before breaks and after handling; do not eat, drink, or smoke when using this product; remove and wash contaminated clothing before reuse.
Appearance: Yellow to greenish-yellow crystalline powder
Odor: Slight, characteristic
Odor Threshold: Not determined
pH (1% solution): Approximately 5 - 8
Melting Point/Freezing Point: Decomposes before melting
Boiling Point: Not available (decomposes)
Flash Point: Not applicable
Evaporation Rate: Not applicable
Flammability: Non-flammable under normal conditions
Vapor Pressure: Negligible at room temperature
Vapor Density: Not available
Solubility: Soluble in water; slightly soluble in alcohol
Partition Coefficient (n-octanol/water): Not measured
Auto-Ignition Temperature: No data
Decomposition Temperature: Above approximately 120 °C
Viscosity: Not applicable
Chemical Stability: Stable under standard temperature and pressure when stored and handled properly.
Incompatible Materials: Strong oxidizing agents, strong acids, strong bases; contact with these materials can provoke hazardous decomposition.
Hazardous Decomposition Products: Nitrogen oxides, sulfur oxides, carbon monoxide, carbon dioxide.
Conditions to Avoid: Excessive heat, humidity, sources of ignition; avoid generating dust.
Acute Toxicity: Data on oral, dermal, and inhalation toxicity is limited; dust may be harmful if breathed or swallowed in large amounts.
Skin Corrosion/Irritation: Contact may cause irritation, redness, itching, or rash.
Serious Eye Damage/Irritation: Direct contact causes eye irritation, tearing, redness.
Respiratory Sensitization: Repeated or prolonged inhalation may sensitize respiratory tract or lead to allergy-like symptoms.
Carcinogenicity/Mutagenicity: No conclusive animal or human studies available; not listed as a known carcinogen.
Other Information: No reproductive toxicity or teratogenicity data available.
Aquatic Toxicity: May be hazardous to aquatic life; precise toxicity studies often lacking, but precaution advised due to chemical structure.
Persistence and Degradability: Likely to persist in the environment; degradation may occur slowly by microbial action or photolysis.
Bioaccumulative Potential: Not expected to bioaccumulate based on available physical-chemical properties.
Mobility in Soil: Medium to high water solubility suggests moderate mobility; may migrate through soil to groundwater.
Other Adverse Effects: Discharge to the environment should be minimized and managed as hazardous.
Waste Treatment Methods: Disposal of material and contaminated packaging through authorized chemical waste disposal contractor.
Container Disposal: Empty containers should be cleaned with care and disposed in accordance with local, regional, and national regulations.
Special Precautions: Do not dispose of into public sewage systems, natural watercourses or open environment.
UN Number: Not assigned for this specific compound
UN Proper Shipping Name: Not regulated as a dangerous good by road (ADR), air (IATA), or sea (IMDG) under common shipment conditions
Transport Hazard Class: Not classified
Packing Group: Not classified
Marine Pollutant: No information indicating classification as a marine pollutant
Other Information: Ensure containers are properly labeled and sealed; special precautions during transport only needed if large quantities or special conditions apply.
Labelling Requirements: Conforms to regulations under GHS (Globally Harmonized System), OSHA Hazard Communication Standard in the US, and relevant EU directives (REACH/CLP).
Inventory Status: Listed on national and international chemical inventories where relevant.
Restrictions: Not specifically regulated for restriction; local, federal, and international regulation should be checked for updates.
Other Regulatory Data: Emergency Planning and Community Right-to-Know Act (EPCRA) listings, California Proposition 65 status not specifically applicable; TSCA inventory check advised for US use; consider workplace exposure directives in EU countries.
User Responsibilities: Users must determine suitability of material in their application and comply with all applicable health, safety, and environmental laws and regulations.
