© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Name: Pararosaniline Hydrochloride Chemical Family: Triarylmethane dyes Chemical Formula: C19H18ClN3 Common Uses: Laboratory reagent, dye for microscopy, histological staining agent Physical State: Deep red-violet crystalline powder Odor: Almost odorless Solubility: Highly soluble in water and ethanol Synonyms: C.I. 42500, Basic Red 9 CAS Number: 569-61-9
Main Hazards: Harmful if swallowed, may cause skin irritation, eye damage, and respiratory tract irritation Signal Word: Warning Routes of Exposure: Inhalation, skin contact, ingestion, eye contact Symptoms of Exposure: Coughing, sore throat, redness or burning sensation in eyes and on skin Long-term Concerns: Possible risk of cancer based on animal studies; mutagenicity observed in some lab conditions OSHA Classification: Hazardous chemical
Main Ingredient: Pararosaniline Hydrochloride Concentration: Approximately 99% Impurities: Trace moisture, minor related dye compounds, inorganic salts Other Ingredients: Not identified in significant amounts
Inhalation: Remove individual from exposure area, move to fresh air, seek medical attention if breathing is difficult Skin Contact: Wash skin thoroughly with soap and plenty of water, remove contaminated clothing Eye Contact: Rinse cautiously with water for several minutes, seek medical attention if pain or irritation persists Ingestion: Rinse mouth with water (do not induce vomiting), seek immediate medical advice Notes for Medical Personnel: Treat symptoms and provide supportive care
Suitable Extinguishing Media: Water spray, dry chemical powder, foam, carbon dioxide Fire Hazards: Thermal decomposition can produce toxic gases including nitrogen oxides and hydrochloric acid Protective Actions: Use self-contained breathing apparatus, wear chemical resistant protective clothing Special Precautions: Keep away from direct flames, avoid inhalation of smoke or combustion byproducts
Personal Precautions: Wear appropriate protective equipment such as gloves, goggles, dust mask Environmental Precautions: Avoid discharge into drains, waterways, or soil Clean Up Procedures: Use a HEPA-filter vacuum or damp sweeping to minimize dust formation; collect in sealed containers for disposal Disposal: Dispose of waste according to local environmental regulations
Handling: Work in a well-ventilated area, use appropriate personal protective equipment, minimize dust generation Storage Conditions: Keep in tightly closed containers, store in a cool, dry, and well-ventilated place, protect from light and moisture Incompatibilities: Strong oxidizers, acids, alkalis Hygiene Measures: Wash hands thoroughly after use, do not eat or drink near the material, clean work surfaces regularly
Engineering Controls: Use fume hoods or local exhaust ventilation Respiratory Protection: Wear a dust mask or respirator if airborne concentration increases Skin Protection: Lab coats, nitrile or neoprene gloves Eye Protection: Chemical safety goggles Additional Measures: Eyewash stations and safety showers recommended in work areas Occupational Exposure Limits: No established OSHA PEL or ACGIH TLV for this compound, though good industrial hygiene practices apply
Appearance: Fine, lustrous crystalline powder, dark red-violet color Melting Point: Approximately 300°C, decomposes Boiling Point: Not applicable (decomposes before boiling) Solubility: Easily dissolves in water or alcohol, staining solutions produced at low concentrations Vapor Pressure: Negligible at room temperature Odor Threshold: Not defined pH (in solution): Slightly acidic Other Properties: Stable in standard laboratory conditions; moisture sensitivity can cause caking
Chemical Stability: Stable under recommended storage and handling conditions Incompatible Materials: Strong oxidizers increase fire risk, strong acids or bases break down dye structure Hazardous Decomposition Products: Upon heating, releases irritating or toxic fumes such as nitrogen oxides and hydrochloric acid Reactivity: Will not polymerize or react violently under normal conditions
Acute Toxicity: Harmful if swallowed or inhaled; produces irritation to skin, eyes, and respiratory tract Chronic Toxicity: Repeated or prolonged exposure can affect liver and kidneys in high-dose animal studies, possible links to carcinogenicity Symptoms: Nausea, abdominal pain after ingestion; persistent cough, headaches after inhalation Carcinogenicity: Classified by some agencies as possibly carcinogenic based on evidence from animal research; not enough human data Mutagenicity: DNA mutations observed in some laboratory cell lines Teratogenicity: Not well-described in literature
Ecotoxicity: Known to be toxic to aquatic organisms at high concentrations Persistence: Dyes often resist biodegradation; risk of long-term accumulation in water systems Bioaccumulation: Limited data, but similar compounds can accumulate in aquatic plants and small organisms Mobility: Highly soluble in water, can spread rapidly Advice: Keep out of lakes, streams, and public water systems
Waste Disposal Methods: Send material to licensed chemical waste facility or hazardous waste incineration Packaging Disposal: Decontaminate packaging or dispose of as hazardous waste Avoid: Discharging solution down drains, releasing dust into the air, uncontrolled burning Regulatory Advice: Follow local environmental and safety rules strictly; use a registered waste carrier
UN Number: Not classified under common hazardous goods shipping lists Transport Hazard Class: Treat as nonhazardous at small scale but still package securely to prevent dust formation and breach Safety in Transport: Ensure container integrity, keep away from incompatible materials, label as laboratory chemical Spill Protocol in Transit: Contain, avoid inhalation, contact hazardous materials team if significant spill occurs
Regulations: Controlled under workplace safety standards for chemical handling and hazardous substances Labeling: Must carry hazard warnings for skin, eye, respiratory risks Workplace Controls: Employer must provide training, hygiene facilities, and monitoring for laboratory staff Environmental Protection: Incineration and chemical waste regulations apply Global Restrictions: Many countries limit use in products that contact food or consumer skin
