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Product Name: Type D Mixture of 2-Diazo-1-Naphthol Sulfonates
Chemical Family: Aromatic sulfonic acid diazo derivatives
CAS Numbers: 825-38-5, 119-80-6 (mixture components may vary)
Synonyms: Diazonaphthol sulfonate blend
Use of Substance: Light-sensitive photoresist and photolithography applications
Supplier Name: Chemical manufacturer or distributor
Contact Details: Emergency telephone, address, email, and non-emergency phone number
Date of Issue: June 2024
GHS Classification: Acute toxicity (oral, dermal, inhalation); Eye irritation; Skin sensitization
Signal Word: Warning
Hazard Statements: Harmful if swallowed; Causes skin and eye irritation; May cause allergic skin reaction
Pictograms: Exclamation mark, health hazard
Precautionary Statements: Avoid skin and eye contact, inhale only in ventilated areas, do not eat or drink during handling
Other Hazards: Dust may cause respiratory discomfort, not classified as combustible, decomposes under heat or UV
Chemical Identity: 2-Diazo-1-naphthol-5-sulfonic acid sodium salt
Concentration: 50–80% by weight
Chemical Identity: 2-Diazo-1-naphthol-4-sulfonic acid sodium salt
Concentration: 20–50% by weight
Impurities: Trace organic byproducts, residual solvents (<1%)
Additional Ingredients: Stabilizers, moisture (not classified as hazardous at present levels)
Inhalation: Remove from exposure; fresh air access; medical attention if symptoms persist
Skin contact: Wash thoroughly with soap and water; strip contaminated clothing; seek medical advice if irritation arises
Eye contact: Rinse thoroughly for 15 minutes; avoid direct hand-eye contact; consult ophthalmologist for persistent redness
Ingestion: Wash out mouth, do not induce vomiting, consult poison control immediately
Symptoms: Eye redness, itching, respiratory discomfort, possible headaches or dizziness with inhalation
Notes for Doctor: Symptomatic measures recommended; avoid gastric lavage; monitor respiratory complaints
Suitable Extinguishing Media: CO2, dry chemical, foam, or water mist
Unsuitable Media: High-pressure water stream disperses material
Specific Hazards: Decomposition releases toxic gases (NOx, SO2)
Protective Equipment: Full protective clothing, self-contained breathing apparatus
Special Procedures: Remove combustibles, cool surrounding surfaces, avoid direct run-off into sewers
Personal Precautions: Use personal protective equipment (PPE) as detailed below, ventilate area, avoid breathing in dusts
Environmental Precautions: Limit spread to drains and surface water, cover with damp-inert material
Spill Cleanup: Scoop mechanically into chemical waste containers, clean residue with water and detergent, avoid creating dust
Safe Handling: Work in well-ventilated areas, avoid direct skin and eye contact, use gloves, keep product tightly sealed
Storage Conditions: Store in original packaging or containers, dry, cool, dark location
Incompatibilities: Strong oxidizers, acids, alkalis, and direct sunlight
Special Considerations: Store away from moisture and sources of ignition; segregate from food or drink
Occupational Exposure Limits: Not established for mixture; personal exposure should remain below 1 mg/m3 particulate matter
Ventilation: Local exhaust, chemical fume hood or vented enclosure
Respiratory Protection: NIOSH-approved dust mask or half-face respirator for powders
Skin Protection: Chemical-resistant gloves, long-sleeve garments
Eye Protection: Tight-fitting safety goggles
Hygiene Measures: Wash hands before breaks, after work, remove contaminated clothing promptly
Appearance: Yellow to brownish powder
Odor: Weak, non-specific chemical scent
pH: 6–9 (aqueous solution)
Melting Point/Freezing Point: Decomposes above 170°C
Boiling Point: Not applicable (decomposes before boiling)
Solubility: Well soluble in water, partly soluble in alcohols
Vapor Pressure: Negligible at ambient temperature
Specific Gravity: 1.3–1.6 g/cm3
Flash Point: Not applicable
Odor Threshold: Data not available
Partition Coefficient: Log Kow estimated at -3.2 to -4.1
Viscosity: Not relevant (solid at room temperature)
Explosive Properties: None known under normal conditions
Chemical Stability: Stable in dark and dry conditions, sensitive to light and humidity
Conditions to Avoid: High temperature, exposure to light, strong oxidants, acids, alkalis
Hazardous Decomposition: Nitrogen oxides, sulfur oxides, aromatic amines
Polymerization Risks: No polymerization observed
Reactivity: Reacts with strong acids, oxidizers; may react with bases producing diazo degradation
Acute Toxicity: Ingestion LD50 oral (rat): 1500–2500 mg/kg
Skin Corrosion/Irritation: May cause reddening and discomfort upon direct contact
Serious Eye Damage/Irritation: Strong irritation expected; transient conjunctivitis
Respiratory Sensitization: Dust inhalation may cause sneezing, coughing, or mild asthma in sensitive users
Skin Sensitization: Documented allergic contact dermatitis in repetitive exposure
Chronic Health Effects: No chronic systemic toxicity reports available; occupational asthma cannot be ruled out
Ecotoxicity: Harmful to aquatic organisms, potential for acute toxicity in fish, daphnia
Persistence and Degradability: Slow decomposition in soil and water, moderate persistence in aquatic environments
Bioaccumulation Potential: Low due to high water solubility and ionization
Mobility in Soil: High mobility due to water solubility; potential leaching to groundwater
Other Effects: Photo-breakdown products may also display toxicity toward algae and daphnia
Precautionary Measures: Prevent discharge of larger quantities into water bodies, wastewater treatment preferred
Disposal Methods: Chemical waste landfill or incineration at licensed facility
Container Handling: Triple rinse containers, render non-reusable, dispose per local, state, and federal regulations
Recycling: Not recommended due to contaminant residues
Special Precautions: Prevent release to surfacewater, follow hazardous waste codes for spent photoresist batches
UN Number: 3077
UN Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains 2-diazo-1-naphthol sulfonates)
Transport Hazard Class: 9 (miscellaneous dangerous substances)
Packing Group: III
Special Transport Precautions: Keep dry during transit, avoid rough handling
Marine Pollutant: Yes (per IMDG guidelines)
Other Information: Label with appropriate hazard statements and pictograms as specified by transport authorities
Inventory Status: Listed under TSCA (USA), EINECS (Europe)
SARA Title III: Not listed as extremely hazardous, reportable under Section 313
REACH Registration: Pre-registered, compliance with downstream safety obligations required
Workplace Regulations: Subject to OSHA, EU-REACH, and GHS labeling and reporting
Health & Safety Codes: Use according to local chemical safety laws
Labeling: GHS-compliant symbols, precaution codes, handling and PPE requirements
