Product Name: 4-(p-Nitrophenylazo)resorcinol
Synonyms: p-Nitrophenylazoresorcinol, 4-(4-Nitrophenylazo)benzene-1,3-diol
CAS Number: 1798-92-1
Recommended Use: Laboratory chemicals, research and analytical reagent
Supplier: [Company-specific information required]
Emergency Phone Number: [Company-specific information required]
Classification: Acute toxicity (Oral, Dermal), Eye irritation, Skin irritant, Specific target organ toxicity
Signal Word: Warning
Hazard Statements: Harmful if swallowed; causes skin irritation; causes serious eye irritation; may cause respiratory irritation; suspected of causing genetic defects
Pictograms: Exclamation mark, health hazard
Precautionary Statements: Avoid breathing dust; wear protective gloves/eye protection; wash thoroughly after handling; do not eat, drink or smoke when using product
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Chemical Name: 4-(p-Nitrophenylazo)resorcinol
Synonyms: p-Nitrophenylazoresorcinol
Molecular Formula: C12H9N3O4
Molecular Weight: 259.22 g/mol
Concentration: ≥98% (research-grade purity)
Impurities: May contain trace impurities from synthesis (manufacturer data)
CAS Number: 1798-92-1
Inhalation: Move to fresh air; keep airway clear; consult a doctor if symptoms persist (coughing, shortness of breath)
Skin Contact: Remove contaminated clothing; wash affected area with soap and water for at least 15 minutes; seek medical help if skin irritation develops or persists
Eye Contact: Rinse cautiously with plenty of water for at least 15 minutes; remove contact lenses if present; continue rinsing; get immediate medical attention
Ingestion: Rinse mouth; do not induce vomiting unless instructed by medical professionals; seek immediate medical attention
Most Important Effects/Symptoms: Irritation, potential for allergic reactions, gastrointestinal disturbance, possible central nervous system effects
Suitable Extinguishing Media: Dry chemical, water spray, foam, carbon dioxide
Unsuitable Extinguishing Media: Avoid using direct water jets to prevent chemical dispersal
Hazardous Combustion Products: Carbon monoxide; nitrogen oxides; phenolic compounds; toxic fumes
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective gear
Specific Hazards: Dust explosion risk; product may form hazardous decomposition products under fire conditions
Firefighting Instructions: Contain runoff from firefighting to prevent contamination of water supplies and drains
Personal Precautions: Evacuate unnecessary personnel; wear appropriate PPE (gloves, goggles, respirator); avoid inhaling dust or contact with skin and eyes
Environmental Precautions: Prevent spillage from entering drains or watercourses; ventilate affected area
Containment: Sweep up without generating dust; collect in appropriate containers for disposal; avoid dry sweeping; use wet methods or approved vacuum equipment
Clean-Up Methods: Dispose of collected material in accordance with local regulations; wash spill area with soap and water; ventilate contaminated area
Handling: Use in a chemical fume hood; minimize dust generation; avoid contact with skin, eyes, and clothing; keep container tightly closed; use tools and equipment designed for chemical handling
Storage: Store in a cool, dry, well-ventilated area; keep away from heat, sparks, and open flames; keep container tightly sealed when not in use; store away from incompatible substances (strong oxidizers, reducing agents)
Special Conditions: Maintain separation from foodstuffs and beverages; label containers clearly and accurately; check regularly for leaks or damage
Occupational Exposure Limits: Not established for this compound; observe general dust limits (OSHA PEL: 15 mg/m3 for total dust)
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits
Personal Protective Equipment:
- Respiratory Protection: Wear approved respirator if exposure limits are exceeded or dust is generated
- Eye/Face Protection: Chemical safety goggles or face shield
- Skin Protection: Wear chemical-resistant gloves and lab coat
- Hygiene Measures: Wash hands before breaks and at the end of the workday; remove contaminated clothing and wash before reuse
Environmental Exposure Controls: Avoid release into the environment; cycle spills through appropriate waste management systems
Appearance: Red to orange powder
Odor: Odorless
Odor Threshold: Not applicable
pH: Not determined
Melting Point/Range: 236-240°C (lit.)
Boiling Point/Range: Not determined
Flash Point: Not available
Evaporation Rate: Not applicable
Flammability (solid, gas): May support combustion at high temperatures
Upper/Lower Explosive Limits: Not determined
Vapor Pressure: Negligible at ambient temperature
Vapor Density: Not available
Relative Density: Not established
Solubility: Slightly soluble in water; soluble in organic solvents (ethanol, acetone)
Partition Coefficient (n-octanol/water): Not available
Auto-ignition Temperature: Not determined
Decomposition Temperature: May decompose at elevated temperatures
Chemical Stability: Stable under recommended storage conditions
Possibility of Hazardous Reactions: No known hazardous polymerization
Conditions to Avoid: Exposure to heat, open flame, sources of ignition, strong sunlight
Incompatible Materials: Strong acids, strong bases, oxidizing agents, reducing agents
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, nitrogen oxides, toxic phenolic vapors
Other Information: Avoid prolonged exposure to moisture and air; keep containers tightly sealed
Routes of Exposure: Ingestion, inhalation, skin contact, eye contact
Acute Toxicity: Data not available for this specific compound, but aromatic azo compounds often show moderate oral and dermal toxicity
Skin Corrosion/Irritation: Causes irritation; may cause allergic sensitization in susceptible individuals
Serious Eye Damage/Irritation: Causes serious eye irritation
Respiratory/Skin Sensitization: May cause allergy or asthma symptoms or breathing difficulties
Germ Cell Mutagenicity: Some azo compounds have shown mutagenic potential in laboratory tests
Carcinogenicity: Not listed by IARC, NTP, or OSHA; long-term exposure to some azo dyes has been linked to cancer in animal studies
Reproductive Toxicity: No data available
Specific Target Organ Toxicity: May cause respiratory tract irritation; high doses may affect liver, kidneys, or central nervous system
Symptoms: Nausea, headache, vomiting, respiratory distress, dermatitis
Ecotoxicity: Potentially toxic to aquatic organisms based on chemical class
Persistence and Degradability: Likely to exhibit persistence as azo dyes often degrade slowly in the environment
Bioaccumulative Potential: No specific data; structurally, azo compounds can bioaccumulate
Mobility in Soil: Limited mobility due to low solubility and high molecular weight
Other Adverse Effects: Azo dyes can produce aromatic amines during breakdown, which can be persistent and toxic to aquatic life
Precautions: Avoid release to the environment whenever possible; contain spillage and dispose of according to regulations
Waste Treatment Methods: Collect and contain chemical waste in compatible, labeled containers
Disposal of Waste: Incinerate in a permitted facility or landfill according to local, regional, and national regulations
Contaminated Packaging: Dispose of as unused product; rinse containers thoroughly before recycling or disposal
Precautions for Disposal: Do not dispose into environment; consult appropriate regulatory agencies
Other Information: Waste codes may vary locally; ensure all procedures align with responsible waste management policies
UN Number: Not regulated for transport in most jurisdictions
UN Proper Shipping Name: Not applicable
Transport Hazard Class: Not classified as dangerous goods
Packing Group: Not applicable
Environmental Hazards: Not classified as environmentally hazardous for transport, but avoid accidental environmental release
Special Precautions: Secure containers to prevent tumbling or damage; keep away from food and feedstuffs during transit
OSHA: Not specifically listed; general chemical handling precautions apply
TSCA: Listed or exempt
SARA Title III: Not listed as a reportable hazardous substance
REACH: Covered under general azo dye regulations in Europe; check exact registration status
WHMIS (Canada): Not classified; general laboratory precautions apply
EU Classification: Eye irritation, skin irritation, possible mutagenicity classification may apply
Other Regulations: All handling, use, and disposal must comply with jurisdictional safety, health, and environmental regulations; review latest data sheets and regional laws for updates
