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Chemical Name: 2-Diazo-1-Naphthol-4-Sulfonyl Chloride
Synonyms: DNNSC, Naphthalene-1-diazo-2,4-sulfonyl chloride
Product Use: Photolithography, organic synthesis, chemical research
Manufacturer: Chemical suppliers specializing in diazo compounds
Emergency Contact: Local poison control center, workplace emergency number
CAS Number: 17692-77-2
UN Number: Not classified
Molecular Formula: C10H5ClN2O3S
Molecular Weight: 284.69 g/mol
Classification: Corrosive, harmful, irritant, possible respiratory sensitizer
GHS Label Elements: Danger, corrosive, harmful, health hazard pictograms
Hazard Statements: Causes severe skin burns and eye damage, may cause respiratory irritation, harmful if swallowed or inhaled, may cause allergic skin reaction
Precautionary Statements: Wear chemical-resistant gloves and eye/face protection, avoid breathing dust or fumes, wash hands thoroughly after handling, avoid contact with skin and eyes
Potential Acute Health Effects: Severe irritation or burns to skin, eyes, mucous membranes; irritation to respiratory tract; nausea, vomiting if ingested
Potential Chronic Health Effects: Sensitization, possible long-term respiratory effects, dermatitis
NFPA Rating: Health: 3, Flammability: 1, Instability: 2
Main Ingredient: 2-Diazo-1-Naphthol-4-Sulfonyl Chloride, purity >95%
Impurities: Minor traces of related diazo compounds, possible hydrochloric acid residue, organic solvents from synthesis (usually <1%)
Stabilizers/Additives: None typically added
OSHA PEL: Not established for this compound
ACGIH TLV: Not established
Other Exposure Limits: No data available
Inhalation: Move to fresh air, support breathing as needed, consult physician
Skin Contact: Remove contaminated clothing, flush skin with water for at least 15 minutes, seek medical attention
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, continue rinsing, get immediate medical help
Ingestion: Do not induce vomiting, rinse mouth with water if conscious, call poison control, seek medical attention immediately
Notes to Physician: Treat based on symptoms, monitor respiratory, gastrointestinal, and skin function
Suitable Extinguishing Media: Use water spray, carbon dioxide, foam, or dry chemical powder
Unsuitable Media: Avoid direct water jet on burning material
Fire Hazards: May emit toxic fumes (chlorine, sulfur oxides, nitrogen oxides) during combustion
Special Protective Equipment: Firefighters need self-contained breathing apparatus and full protective clothing
Explosive Properties: Not considered explosive under normal conditions; decomposes at high temperatures to release gases
Personal Precautions: Wear suitable personal protective equipment: gloves, goggles, lab coat, NIOSH-approved respirator
Environmental Precautions: Prevent further leakage or spillage if safe, avoid discharge into drains, surface water, or soil
Cleanup Methods: Absorb spilled product with inert material (sand, earth, vermiculite), collect in suitable chemical waste container, thoroughly ventilate area, decontaminate with dilute sodium bicarbonate solution
Disposal: Dispose of material and contaminated cleanup stuff according to local environmental regulations
Handling: Handle only in well-ventilated areas, avoid dust generation, keep containers closed, avoid contact with skin, eyes, clothing, do not eat, drink, or smoke in working area, use tools and transfer lines that prevent mechanical shock
Storage: Store in a cool, dry, well-ventilated place, away from incompatible materials like water, strong bases, oxidizers; keep container tightly closed and properly labeled; protect from light and direct sunlight
Technical Measures: Use explosion-proof electrical equipment, ensure proper grounding and bonding
Incompatible Materials: Water, bases, oxidizing agents, strong reducing agents
Engineering Controls: Laboratory fume hood or local exhaust ventilation, eyewash stations and safety showers readily available
Respiratory Protection: Use NIOSH-approved respirator if dust or aerosol is formed
Hand Protection: Chemical-resistant gloves (nitrile, neoprene)
Eye Protection: Safety goggles or face shield
Body Protection: Long-sleeved lab coat, chemical-resistant apron
Hygiene Measures: Wash hands thoroughly after handling, remove and wash contaminated clothing before reuse
Appearance: Yellowish to orange crystalline solid, powder
Odor: Faint aromatic, pungent odor
Odor Threshold: No data available
pH: Not applicable (reacts with water)
Melting Point: Decomposes before melting (approx. 150–160°C)
Boiling Point: Not determined
Flash Point: Not flammable under normal conditions
Flammability: Product does not ignite readily
Vapor Pressure: Low (no significant vapor at room temperature)
Vapor Density: Not available
Density: No data available
Water Solubility: Slowly hydrolyzes; not freely soluble in water
Partition Coefficient (log Kow): Not available
Auto-Ignition Temperature: No data available
Decomposition Temperature: Above 140°C
Viscosity: Not applicable (solid)
Chemical Stability: Stable when stored properly below 25°C, protects from moisture and light
Reactivity: Reacts with water to release hydrochloric acid gas, decomposes upon exposure to light and heat
Hazardous Reactions: Violent reaction with strong bases, oxidizers
Conditions to Avoid: Moisture, exposure to light, high temperatures
Incompatible Materials: Water, alcohols, amines, strong oxidizing or reducing agents
Hazardous Decomposition Products: Hydrochloric acid, sulfur dioxide, nitrogen oxides, carbon monoxide
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Harmful if inhaled, ingested, or absorbed through the skin; no specific LD50 data available
Skin Corrosion/Irritation: Causes severe burns
Serious Eye Damage/Irritation: Causes eye burns, may result in permanent damage
Respiratory Sensitization: May cause allergic respiratory reaction
Skin Sensitization: Data limited, but risk of allergic reaction exists
Chronic Effects: Repeated exposure can lead to dermatitis, possible impact on pulmonary system
Carcinogenicity: Not evaluated by NTP, IARC, OSHA; no clear evidence
Reproductive Toxicity: No data available
Mutagenicity: No data available
Ecotoxicity: Harmful to aquatic organisms, may cause long-term adverse effects in aquatic environments
Persistence and Degradability: No significant biodegradation data; expected to hydrolyze in water, but residual components could be harmful
Bioaccumulative Potential: Not studied, possible due to aromatic structure
Mobility in Soil: Low volatile; may leach if spilled in water
Other Adverse Effects: Avoid release to the environment, do not discharge untreated material into natural waters or soil
Waste Disposal Methods: Collect solids in designated containers, incinerate or treat by licensed hazardous waste contractor, neutralize small residues with sodium bicarbonate solution before disposal
Contaminated Packaging: Triple rinse, then dispose of in compliance with local regulations
Precautions: Do not discharge into drains, waterways, or landfill without treatment
UN Number: Not regulated under standard UN classifications for transport
Proper Shipping Name: Chemical not regulated in small quantities, check specific country regulations
Transport Hazard Class: Corrosive solids, packing group II if considered regulated
Special Precautions: Protect from moisture and physical damage, transport in sealed, robust containers
Environmental Hazard: Not classified as marine pollutant but prevent spills
US Federal Regulations: Not specifically listed under SARA Title III, TSCA, or CERCLA
OSHA Hazard Communication: Corrosive, acute toxic hazard
EU Regulation: Listed on REACH preregistration; classification: corrosive, harmful
Labeling Requirements: Chemical name, hazard pictograms, manufacturer details, warning and precautionary statements
Other Regulations: Follow all workplace safety standards set by local, state, and national authorities for hazardous chemicals
