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Product Name: Lead Selenide
Chemical Formula: PbSe
CAS Number: 12069-00-0
Synonyms: Plumbous selenide
Manufacturer's Details: Refer to supplier or manufacturer documentation for up-to-date contact information and emergency telephone numbers specific to your jurisdiction, as these often dictate regional compliance.
Recommended Use: Used in infrared detectors, photoconductors, and semiconductors in various electronic devices.
Restrictions on Use: Laboratory and industrial applications only; not intended for food, drug, or household use.
Emergency Contact: Point of contact for chemical emergencies available through local hazardous materials response centers or poison control services.
GHS Classification: Acute toxicity (oral, inhalation), Carcinogenicity, Reproductive toxicity, Specific organ toxicity (repeated exposure).
Signal Word: Danger
Hazard Statements: Toxic if swallowed; Toxic if inhaled; May cause cancer; May damage fertility or the unborn child; Causes damage to organs through prolonged or repeated exposure.
Precautionary Statements: Avoid breathing dust or fume; Wear protective gloves and eye/face protection; Use only outdoors or in well-ventilated area; Wash hands thoroughly after handling; Do not eat, drink, or smoke when using this product.
Symptoms of Exposure: May include abdominal pain, nausea, vomiting, convulsions, headache, loss of appetite, weight loss, kidney damage, and symptoms consistent with lead or selenium poisoning such as metallic taste, irritability, and peripheral neuropathy.
Emergency Overview: Dusts present acute and long-term health hazards, especially for pregnant women, young children, and those with underlying health issues.
Substance: Lead Selenide
Chemical Formula: PbSe
CAS Number: 12069-00-0
Percent of Composition: Pb (Lead) 54.59%, Se (Selenium) 45.41%
Impurities: Technical grade material may carry minor contaminants depending on synthesis method, potentially including elemental selenium or lead compounds. Trace impurities may vary.
Molecular Weight: 286.16 g/mol
Inhalation: Remove person to fresh air and keep comfortable for breathing. Seek immediate medical attention if symptoms (such as headache, shortness of breath, coughing, or dizziness) develop.
Eye Contact: Immediately flush with gently flowing water for at least 15 minutes, lifting eyelids occasionally to ensure thorough flushing. Remove contact lenses if present and easy to do. Seek medical help if irritation or pain persists.
Skin Contact: Remove contaminated clothing and wash the affected area thoroughly with soap and water. Seek medical attention if skin irritation develops or persists.
Ingestion: Do not induce vomiting. Rinse mouth with water. Never give anything by mouth to an unconscious person. Get medical attention immediately due to risk of systemic toxicity.
Most Important Symptoms/Effects: Delayed effects may involve severe organ damage, especially with repeated exposure.
Notes for Physician: Provide symptomatic and supportive treatment. Monitor for signs of lead or selenium poisoning including renal, neurologic, and gastrointestinal symptoms.
Suitable Extinguishing Media: Use dry sand, dry chemical, or carbon dioxide. Avoid water or foam as runoff may cause environmental contamination.
Specific Hazards: Non-flammable, but under high temperatures or fire conditions may decompose, producing toxic fumes of lead and selenium oxides.
Protective Equipment for Firefighters: Wear self-contained breathing apparatus with full facepiece and full flame protective clothing in case of major fire.
Firefighting Instructions: Move containers from fire area if safe. Dike runoff to prevent entry into water supplies or sewers. Contain fire water and dispose of contaminated material according to regulations.
Flash Point: Not applicable.
Explosion Hazard: Dust may form explosive mixtures with air if finely divided and dispersed in sufficient concentrations, though this is less prevalent compared to organic dusts.
Personal Precautions: Evacuate unnecessary personnel, ventilate area, and use personal protective equipment including respirators, gloves, and goggles. Avoid creating and inhaling dust.
Environmental Precautions: Prevent material from entering drains, surface water, or soil. Notify authorities as required by local laws about any extensive spills.
Cleanup Methods: Use non-sparking tools and pick up spilled material carefully to avoid dust generation. Sweep up and shovel into appropriate, labeled containers for disposal. Decontaminate affected area with approved cleaning products.
Disposal: Handle as hazardous waste. Use containers that block release into the environment and close securely.
Handling: Handle in a chemical fume hood or with adequate local ventilation. Use only with clean, dry hands and tools. Avoid breathing dust, mist, or vapor. No eating, drinking, or smoking during use.
Storage: Store in tightly sealed containers away from incompatible materials such as strong acids and oxidizers. Maintain temperature and humidity control above freezing and away from direct sunlight or heat sources. Store in a well-ventilated, cool, and dry location.
Specific Requirements: Store in a secure area where access is restricted to trained personnel only. Clearly label storage containers and provide secondary containment. Periodically inspect storage sites for leaks or degradation.
Occupational Exposure Limits: Lead compounds (as Pb): OSHA PEL 0.05 mg/m³ (8-hour TWA); Selenium compounds (as Se): OSHA PEL 0.2 mg/m³ (8-hour TWA). Observe all relevant national and local exposure standards.
Engineering Controls: Always use local exhaust ventilation or laboratory hoods. Install eye wash stations and emergency showers near processing areas.
Personal Protective Equipment (PPE): Wear chemical splash goggles, disposable gloves (such as nitrile or neoprene), impermeable lab coats, and appropriate respiratory equipment (such as NIOSH-approved particulate respirators) during all handling processes.
Hygiene Measures: Wash thoroughly after handling and before eating, drinking, or using the restroom. Remove contaminated clothing and wash it before reuse. Prohibit use or storage of lead selenide anywhere food, beverages, or tobacco are present.
Appearance: Black to dark gray crystalline solid or powder
Odor: Odorless
Boiling Point: Decomposes before boiling
Melting Point: 1078°C (1972°F)
Density: Approximately 8.1 g/cm³
Solubility: Insoluble in water; slightly soluble in strong acids
Vapor Pressure: Not measurable at ambient conditions
Molecular Weight: 286.16 g/mol
pH: Not applicable (insoluble in water)
Partition Coefficient: Not determined
Flash Point: Not flammable
Autoignition Temperature: Not applicable
Chemical Stability: Stable under standard conditions of use and storage.
Possibility of Hazardous Reactions: May react with strong acids to form toxic gases including hydrogen selenide and lead salts.
Conditions to Avoid: Exposure to strong acids, strong oxidizers, excess heat, humidity, and uncontrolled handling can degrade performance and safety.
Incompatible Materials: Strong oxidizing agents, strong acids, or storage with combustible materials.
Hazardous Decomposition Products: Lead oxide, selenium dioxide, hydrogen selenide (all present significant toxic hazards).
Acute Toxicity: Toxic by ingestion, inhalation, or prolonged skin contact. Lead and selenium compounds cause a range of toxic effects in humans and other mammals.
Symptoms of Exposure: Nausea, headache, abdominal pain, vomiting, nervous system effects, muscle weakness, and symptoms associated with lead or selenium poisoning which may include peripheral neuropathy, anemia, cognitive deficits, and gastrointestinal distress.
Carcinogenicity: Classified as probably carcinogenic to humans by IARC and NTP for lead compounds. Long-term exposure to selenium compounds may also increase cancer risk but evidence is less conclusive.
Chronic Effects: Kidney damage, neurological deficits, anemia, tremors, birth defects, reproductive harm.
Routes of Exposure: Inhalation, ingestion, dermal absorption.
Toxicokinetics: Both lead and selenium bioaccumulate in the body, especially in bones and organs. Elimination is slow and incomplete.
Ecotoxicity: Highly toxic to aquatic life and persistent in soil. Both lead and selenium compounds can cause long-term adverse effects in the aquatic environment.
Mobility: Very low in water due to insolubility, but particulate matter may be transported with runoff or dispersed dust.
Persistence and Degradability: Persistent in the environment with no significant breakdown over time; does not degrade easily.
Bioaccumulative Potential: Lead selenide poses a risk for biomagnification in food chains and accumulates in tissues of higher organisms.
Other Adverse Effects: Accumulation in soil can harm soil organisms, possibly reaching crops; environmental levels can affect birds and mammals due to lead and selenium toxicity.
Waste Treatment Methods: Handle all disposal activities through licensed hazardous waste contractors that follow federal, state, and local regulations.
Disposal of Contaminated Packaging: Clean and dispose of containers as hazardous waste. Do not reuse packaging for other materials.
Environmental Disposal: Prevent leaching into the environment. Never discharge lead selenide into municipal sewers, waterways, or open environments. Collect all residues for safe disposal.
Recommended Disposal: Secure landfill or incineration at controlled facilities licensed for handling toxic heavy metals.
UN Number: 3288 (Toxic solid, inorganic, n.o.s. [Lead compound, Selenium compound])
Transport Hazard Classes: Class 6.1 (Toxic substances)
Packing Group: III
Labels Required: Toxic substance, keep dry
Special Provisions: Follow all DOT, ICAO, IATA, and IMDG transport regulations. Ensure packaging is strong, sealed, and labeled appropriately, with emergency contact information provided.
Precautions: Ship in ventilated, closed containers. Avoid physical damage, punctures, or opening. Notify carriers and receivers of toxicity risks and handling requirements.
TSCA: Listed on the U.S. Toxic Substances Control Act inventory.
OSHA: Covered under OSHA's Hazard Communication Standard as a health hazard.
SARA Title III: Reportable under Sections 302, 304, 313 (toxic chemical release inventory for lead and selenium compounds).
RCRA: Classified as hazardous waste under Resource Conservation and Recovery Act due to toxicity.
CERCLA: Both lead and selenium compounds have notification requirements for releases above reportable quantities.
California Proposition 65: Contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
International Regulations: Subject to REACH and other EU chemical safety regulations. Control measures enforced in Canada, Australia, and other OECD jurisdictions.
Label Requirements: Ensure containers carry clear hazard statements, pictograms, and handling instructions in the local language of regulators and users.
