© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical Name: 4-Dimethylaminoazobenzene-4'-Arsonic Acid
Other Names: Butter Yellow Arsonic Acid
Molecular Formula: C14H16AsN3O2
General Appearance: Powder or crystalline solid, bold yellow to orange color
Intended Use: Historically referenced in research and dye manufacture; modern use restricted due to toxicity concerns
Acute Toxicity: Known for significant acute toxicity, particularly through ingestion and inhalation
Chronic Health Risks: Carcinogenic potential documented in early animal studies; listed as a substance of concern
Warning Signs: Irritation to eyes, respiratory tract, and skin; risk of organ damage after prolonged or repeated exposure
Environmental Hazard: Arsenic-based compounds present ongoing risks for water sources and ecosystems
Physical Hazards: Does not easily ignite, though dust may present a combustion risk under specific conditions
Main Ingredient: 4-Dimethylaminoazobenzene-4'-Arsonic Acid (100% by weight reported in pure samples)
Impurities: Trace solvents or side-products possible if synthesized in non-industrial settings; avoid contact with unknown contaminants
Toxic Elements: Presence of arsenic introduces high toxicity relative to other organic substances
Inhalation: Remove to fresh air, rest, seek medical attention for breathing difficulty
Skin Contact: Wash with soap and large amounts of water; remove contaminated clothing
Eye Contact: Flush eyes with running water for at least 15 minutes; medical attention may be required
Ingestion: Rinse mouth thoroughly, never induce vomiting unless instructed by medical personnel; urgent medical care highly recommended
General Note: Symptoms may escalate over time; medical supervision necessary for exposures
Suitable Extinguishing Media: Water spray, dry chemical, foam, or carbon dioxide for small fires
Hazardous Combustion Products: Toxic fumes can evolve, including nitrogen oxides, carbon oxides, and arsenic compounds
Personal Protective Equipment: Full firefighting gear, self-contained breathing apparatus required in dangerous atmospheres
Fire Response Tips: Limit runoff; treat all residues and firewater as highly contaminated waste
Personal Protection: Gloves, safety goggles, respirators needed; minimize dust generation
Environmental Precautions: Prevent entry into waterways and sewers due to high arsenic toxicity
Spill Response: Use absorbent materials; collect waste in sealed containers for disposal; ventilate area
Decontamination: Wash contact surfaces thoroughly; avoid sweeping or actions that create airborne particles
Safe Handling: Work in fume hood or well-ventilated lab; avoid inhalation and skin contact; do not eat or drink near area
Storage Conditions: Store in tightly closed containers, away from incompatible substances such as strong oxidizers; keep in dry, cool environment
Special Restrictions: Highly regulated under chemical safety programs; only trained personnel should handle
Engineering Controls: Use local exhaust ventilation or fume hoods; avoid open bench work
Personal Equipment: Lab coats, chemical-resistant gloves, safety goggles, NIOSH-approved respirators for dust or vapors
Sanitation: Wash hands and face after handling; no food, drinks, or open containers in workspace
Exposure Limits: No safe threshold for arsenic-based organics; minimize exposure as much as possible
Physical State: Solid, powder or crystalline
Color: Yellow to orange
Odor: Odorless or faint aromatic odor
Solubility: Difficult to dissolve in water; more soluble in organic solvents
Melting Point: Data may vary depending on purity; typically decomposes rather than melts
Stability Under Normal Conditions: Stable under standard lab temperatures; avoid high heat and strong light
Chemical Stability: Generally stable in storage; decomposes with heat or strong acids
Incompatible Materials: Strong oxidizing agents, bases, acids
Hazardous Decomposition Products: Arsenic oxides, nitrogen oxides, potentially carcinogenic intermediates
Reactivity Note: Care needed during disposal or thermal processing to avoid uncontrolled reactions
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Acute Effects: Nausea, vomiting, headache, shortness of breath, skin or eye irritation
Chronic Effects: Carcinogenic in long-term studies; potential for kidney and liver damage
Organ Toxicity: Exposure can impact liver, kidneys, and nervous system
Additional Risks: Mutagenic or teratogenic effects cannot be ruled out
Persistence: Organic arsenic compounds tend to degrade slowly in environmental conditions
Bioaccumulation: Arsenic compounds can accumulate in aquatic organisms, resulting in long-term toxicity
Aquatic Toxicity: High hazard for fish and invertebrates; runoff threatens entire water systems
Soil Mobility: Likely to bind to soil; slow movement but persistent contamination
Waste Handling: Treat as hazardous waste; use sealed, labeled containers; avoid landfill and sewer disposal
Incineration: Only in chemical waste incinerators with control on emissions for arsenic and organics
Legal Disposal: Follow all local and national hazardous waste regulations
Reuse or Recovery: Not advisable; destruction or strict containment ensures safety
UN Classification: Classified as hazardous material due to arsenic content
Packing Requirements: Sealed, robust chemical-resistant containers; labeled as toxic and environmentally hazardous
Transportation Risks: Spillage or breakage presents serious risk; emergency procedures necessary for all transport
Special Precautions: Not recommended for general commercial carriage; exceptions only for licensed institutions
International Controls: Subject to control under various chemical conventions due to carcinogenicity and toxicity
Permitting: Institutional registration and reporting required for acquisition and use
Worker Rights: Strict workplace hazard communication, medical surveillance for regular handlers
Environmental Release: Notification to authorities required for release or accidental discharge
Banned or Restricted: Many regions ban manufacture, sale, or use without special exemption
