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Product Name: Thallous Carbonate
Synonyms: Thallium(I) carbonate
Chemical Formula: Tl2CO3
Molecular Weight: 468.82 g/mol
CAS Number: 6533-73-9
Recommended Use: Laboratory reagent, specialized chemical synthesis
Supplier: Contact your chemical supplier for detailed manufacturer and emergency contact information
Emergency Number: Refer to supplier or local emergency services
Classification: Acute Toxicity (Oral), Acute Toxicity (Inhalation), Acute Toxicity (Dermal), Specific Target Organ Toxicity (Single and Repeated Exposure)
Signal Word: Danger
Hazard Statements: Fatal if swallowed, in contact with skin, or inhaled. Causes damage to organs, may cause long-term effects. Avoid inhalation, ingestion, and skin contact.
Pictograms: Skull and crossbones, Health hazard
Precautionary Statements: Handle in chemical fume hood, wear full protective equipment, do not eat, drink, or smoke during handling, dispose of contents in accordance with regulations.
Chemical: Thallous Carbonate
CAS Number: 6533-73-9
Concentration: 100%
Impurities: Contains no other components or impurities that can influence the classification of the product.
Inhalation: Move person to fresh air immediately, provide oxygen or artificial respiration if needed, seek medical attention urgently. Symptoms may include headache, dizziness, difficulty breathing, and unconsciousness.
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, seek emergency medical attention, effects may be severe and delayed.
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if easy to do, keep rinsing, call poison control or medical services.
Ingestion: Do not induce vomiting, rinse mouth, never give anything by mouth to an unconscious individual, get immediate medical help. Toxicity risk is extremely high.
Notes to Physician: Monitor cardiac, hepatic, and neurological function. Thallium toxicity requires rapid intervention—consider chelation therapy.
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, or foam. Water spray may be used only to cool containers.
Unsuitable Extinguishing Media: Avoid water directly on substance if possible.
Fire Hazards: Product is not flammable but may release toxic fumes (thallium oxide, carbon monoxide, carbon dioxide) upon heating or during fire.
Protective Equipment: Firefighters need self-contained breathing apparatus, full protective clothing.
Advice for Firefighters: Move containers if safe, avoid exposure to fumes, contain runoff from firefighting to prevent environmental contamination.
Personal Precautions: Evacuate area, restrict access. Wear gloves, respirator, eye and face protection, chemical-resistant clothing.
Environmental Precautions: Avoid entry to waterways and soil, keep as much chemical contained as possible.
Methods for Containment and Cleanup: Do not touch spilled material without adequate protection. Sweep up without creating dust, use HEPA vacuum if possible. Place into secure chemical waste container for proper disposal.
Emergency Procedures: Notify local authorities, follow specific facility protocols for toxic substance release.
Handling: Handle inside properly ventilated fume hood, wear suitable personal protective gear, avoid all direct contact. Keep records of use and worker exposure. Do not allow untrained personnel to handle.
Storage: Store locked, away from food, feed, and water sources. Use corrosion-resistant containers, labeled securely. Keep in cool, dry, well-ventilated area. Avoid heat, flames, and incompatible materials. Store below 25°C. Prevent accidental spills or leaks.
Exposure Limits: OSHA PEL (TWA) for thallium compounds: 0.1 mg/m3 (as Tl); ACGIH TLV: 0.1 mg/m3 (as Tl, Skin)
Engineering Controls: Strong local exhaust ventilation, chemical fume hood. Emergency eyewash stations and showers nearby.
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety goggles, face shield, long-sleeved lab coat or coveralls, impervious footwear. Use suitable respiratory protection (NIOSH-approved full-face respirator with P-100 filter or supplied air) during risk of airborne exposure.
Hygiene Measures: Remove protective gear before leaving work area, wash hands thoroughly after handling, do not eat, drink, or smoke in work area.
Appearance: White, odorless crystalline solid or powder
Odor: Odorless
Melting Point: Decomposes before melting
Boiling Point: Not applicable (decomposes)
Solubility: Soluble in water (19 g/L at 20°C)
Vapor Pressure: Not applicable
Density: 7.11 g/cm3
pH: Alkaline in solution
Flash Point: Not flammable
Other Information: Decomposes on strong heating, releases toxic gases.
Chemical Stability: Stable under recommended storage conditions, sensitive to light and moisture over long periods.
Reactivity: May react with acids to release toxic carbon dioxide and thallium salts.
Hazardous Reactions: Forms toxic decomposition products (thallium oxide, carbon monoxide, carbon dioxide) if heated strongly.
Incompatible Materials: Strong acids, oxidizers, bases, and reducing agents.
Hazardous Decomposition Products: Thallium oxide, carbon monoxide, carbon dioxide.
Acute Toxicity: Extremely toxic by ingestion, inhalation, and skin absorption. LD50 (oral, rat): 21 mg/kg. Symptoms include gastrointestinal upset, nerve damage, hair loss, and multi-organ failure.
Chronic Toxicity: Cumulative poison, repeated exposure damages nervous system, liver, kidneys, and causes reproductive toxicity.
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA, but long-term effects unknown.
Possible Routes of Exposure: Inhalation, skin, eyes, ingestion.
Symptoms: Muscle aches, numbness, confusion, tremor, delirium, kidney and liver impairment, cyanosis, hair loss, possible death.
Ecotoxicity: Very toxic to aquatic life. LC50 (fish): 0.06 mg/L (96hr, thallium ion). Buildup in food chain through aquatic organisms possible.
Persistence and Degradability: Not rapidly degradable, may persist in soil and sediment.
Bioaccumulative Potential: Bioaccumulates in aquatic species and enters terrestrial food chains.
Mobility in Soil: Moderate; leaches through soil, potential for groundwater contamination.
Other Adverse Effects: Do not dispose into environment. Prolonged exposure risks for wildlife and ecosystems.
Waste Disposal Methods: Treat as hazardous waste. Collection and disposal must comply with federal, state, and local regulations. Use licensed hazardous waste contractor, incinerate or landfill only in authorized facilities. Do not flush down drains or release to environment.
Contaminated Packaging: Dispose as hazardous waste. Thoroughly clean or destroy. Follow local policies for hazardous chemical containers.
UN Number: UN1707
UN Proper Shipping Name: Thallium compound, n.o.s. (includes thallous carbonate)
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: I (highest danger)
DOT Label: Poison
Transport Precautions: Secure in locked, clearly labeled, and sealed containers. Ensure compatibility of packaging with substance.
Other Information: Notify authorities immediately if there is a spill during transport.
US Federal Regulations: Subject to TSCA regulations. Regulated by OSHA Hazard Communication Standard. CERCLA hazardous substance (reportable quantity 100 lbs). SARA 313: Thallium compounds listed.
State Regulations: California Proposition 65: Thallium compounds are listed as known to cause developmental harm.
International Regulations: Covered by EU REACH; International transportation regulated under ADR, IMDG, IATA.
Other Information: Users must keep full records of use, storage, and disposal. Facilities must provide safety training on toxic chemicals.
