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Product Name: Acid Yellow 99
Chemical Formula: C16H12N4Na2O7S2
Synonyms: C.I. 13065, Aizen Yellow, C.I. Acid Yellow 99
CAS Number: 103430-45-1
Manufacturer: Information varies—consult local supplier
Recommended Use: Textile dyeing, paper coloring, research laboratories
Contact Information: Refer to supplier or manufacturer for up-to-date emergency contact numbers
Classification: Eye irritant, skin sensitize
GHS Label Elements: Warning, exclamation mark pictogram
Acute Effects: Eye and skin irritation, potential respiratory discomfort on inhalation
Chronic Effects: Repeated exposure may lead to dermatitis or allergic reaction
Potential Health Hazards: Irritation to eyes, nose, and throat, risk of staining skin and clothes, possible allergic reactions with prolonged skin contact
Chemical Name: Acid Yellow 99
Concentration: >90%
Impurities/ Additives: Trace organic salts, sodium sulfate (may be present as byproduct)
Hazardous Components: No components classified as acute toxins at current concentration
Other Ingredients: None known that change hazard classification at this concentration
Inhalation: Move affected individual to fresh air, offer support for breathing if needed
Eye Contact: Rinse thoroughly with lukewarm water for at least 15 minutes, seek medical help for lingering irritation
Skin Contact: Wash area with soap and plenty of water, remove contaminated clothing, monitor for persistent irritation
Ingestion: Rinse mouth, drink water to dilute, do not induce vomiting, get medical attention if feeling unwell
Notes for Medical Professionals: Treat symptomatically, monitor for signs of allergic reaction or respiratory distress
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Unsuitable Media: Avoid direct water jets on undiluted powder
Hazards from Combustion: Toxic fumes may result, including oxides of nitrogen and sulfur
Advice for Firefighters: Wear full protective clothing with self-contained breathing apparatus, prevent run-off entering drains
Specific Methods: Remove undamaged product from danger if safe, cool sealed containers with water mist
Personal Precautions: Use gloves, safety goggles, dust mask; limit exposure
Environmental Precautions: Prevent dye from entering waterways, sewers, or soil
Spill Cleanup Methods: Collect powder using damp cloth or vacuum with HEPA filter, store in sealable waste containers
Disposal: Avoid creating dust, ventilate area, launder contaminated clothing before reuse
Emergency Procedures: Restrict unnecessary entry, notify environmental authorities if large spill runs off-site
Safe Handling: Work in well-ventilated areas, use protective clothing, avoid eating or drinking during use
Hygiene Recommendations: Remove and wash contaminated clothing before reuse, wash hands after handling
Storage Conditions: Store in tightly closed containers, keep out of direct sunlight, away from incompatible substances like strong oxidizers
Storage Temperature: Keep product in a cool, dry, well-ventilated place, away from heat sources
Incompatibilities: Avoid storage with acids, strong bases, combustible materials
Engineering Controls: Use local exhaust or general ventilation to control exposure below recommended limits
Personal Protective Equipment: Wear chemical-resistant gloves, safety goggles or face shield, lab coat or apron
Respiratory Protection: Use dust mask or respirator if exposure limits are likely to be exceeded
Hygiene Measures: Avoid contact with skin and eyes, do not inhale dust or aerosol mists, wash hands thoroughly
Occupational Exposure Limits: Not established – follow prudent industrial hygiene practices
Appearance: Bright yellow powder
Odor: Mild, characteristic of organic dyes
pH (1% solution): About 5.0 to 7.5
Melting Point: Decomposes above 200°C
Solubility: Soluble in water, little to no solubility in common organic solvents
Boiling Point: Not applicable (solid dye)
Vapor Pressure: Not measurable at ambient temperature
Density: Approx. 1.2 g/cm³
Partition Coefficient n-octanol/water: Not determined
Flash Point: Not flammable under normal conditions
Auto-ignition Temperature: Data not available
Evaporation Rate: Not applicable
Viscosity: Not applicable for solid dye
Chemical Stability: Stable under normal storage and handling conditions
Possible Hazardous Reactions: None known under safe storage
Conditions to Avoid: Exposure to moisture, strong acids and bases, high temperatures
Incompatible Materials: Strong oxidizing agents, strong acids, strong alkalis
Hazardous Decomposition Products: Oxides of nitrogen, sulfur oxides, carbon oxides under fire conditions
Polymerization: Not expected to occur
Acute Toxicity: Low oral and dermal toxicity as reported, but ingestion of large quantities may irritate digestive tract
Skin Sensitization: Prolonged contact may cause allergic skin response in sensitive individuals
Eye Effects: Direct exposure causes irritation
Respiratory Effects: May cause mild nasal or throat irritation with dust exposure
Long-Term Exposure: Limited studies; not classified as a carcinogen, mutagen, or reproductive toxin by IARC, NTP, or OSHA
Ecotoxicity: Dyes such as Acid Yellow 99 can affect aquatic organisms by reducing oxygen in water, affecting algae growth, and staining surfaces
Mobility in Soil: Tends to bind to soil and organic matter, limiting mobility
Persistence and Degradability: Dyes resist biodegradation; may persist in environment
Bioaccumulation: No significant potential expected
Aquatic Toxicity: Harmful to aquatic life if large quantities enter water systems
Other Effects: Product can contribute to color pollution in water bodies
Waste Disposal: Dispose of dye waste according to local, regional, and national regulations
Preferred Method: Incineration in chemical incinerator with afterburner and scrubber
Alternative Method: Offer surplus and non-reusable solutions to licensed hazardous waste disposal company
Container Disposal: Triple rinse empty containers, offer for recycling or dispose of as hazardous waste
Do Not: Discharge to surface water, sewer, or open environment
UN Number: Not classified as a dangerous good for transport
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Labeling: Not required for most ground, air, or sea transport
Special Precautions: Protect containers against physical damage and moisture, secure properly during transport
Other Information: Consult national and carrier regulations before shipping large quantities
OSHA Status: Not considered hazardous under OSHA standards
SARA Section 313: Not listed
TSCA Inventory: Components are on the inventory (verify with supplier if regulatory status is critical)
EINECS Status: Dye is either registered or exempt (details depend on region)
Labeling Requirements: Use appropriate workplace hazard warning labels for skin/eye irritants
Other Regulations: Follow local environmental, health, and chemical safety regulations; employer must provide training on safe use and handling
