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Product Name: Cadmium Selenide
Chemical Formula: CdSe
CAS Number: 1306-24-7
EC Number: 215-146-2
Synonyms: Cadmium selenide, Cadmium red
Recommended Use: Semiconductor applications, photovoltaic cells, pigments
Supplier Information: Manufacturer and distributor contact information should be kept accessible at the workplace
Emergency Phone Number: Local emergency numbers or supplier’s emergency contact should be clearly posted
Classification (GHS): Acute toxicity (oral, dermal, inhalation), Carcinogen (Category 1B), Reproductive toxicity (Category 1B), Specific Target Organ Toxicity (repeated exposure)
Hazard Statements: Toxic if swallowed, inhaled, or absorbed through skin. Suspected of causing genetic defects and cancer. Causes damage to organs through prolonged or repeated exposure.
Signal Word: Danger
Pictograms: Skull and crossbones, health hazard
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Chronic Effects: Cancer risk, may impact kidney, liver, lungs, reproductive system
Precautionary Statements: Avoid breathing dust or fumes, use only with proper protection, keep away from eat/drink/smoke areas, wash hands after handling
Substance: Cadmium Selenide
Chemical Formula: CdSe
CAS Number: 1306-24-7
Content: 97-100% (technical grade)
Impurities: May contain trace amounts of cadmium oxide or other cadmium/selenium compounds, consult supplier for trace contaminants information
Eye Contact: Rinse cautiously with water for at least 15 minutes, remove contact lenses, seek immediate medical advice
Skin Contact: Take off contaminated clothing, wash skin thoroughly with soap and water, seek medical attention if irritation develops
Inhalation: Move to fresh air, keep warm and at rest, seek immediate medical attention, administer artificial respiration if breathing stops
Ingestion: Do not induce vomiting, rinse mouth, call poison control center or physician immediately
Symptoms: Headache, nausea, vomiting, abdominal pain, respiratory distress, convulsions in severe exposure
Advice for Physicians: Treat symptomatically and monitor for delayed effects, consider chelation therapy in severe exposure
Suitable Extinguishing Media: Use foam, dry chemical, carbon dioxide; do not use water jet on larger fires as material may react
Specific Hazards: Material may emit toxic cadmium and selenium fumes upon heating, releasing cadmium oxides and selenium compounds
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear
Special Procedures: Cool exposed containers with water spray from a safe distance, prevent runoff from entering drains or waterways
Explosion Hazard: Though not readily combustible, finely divided dust can pose explosion risk in air under certain conditions
Personal Precautions: Evacuate non-essential personnel, ventilate area, wear protective clothing, gloves, and respirator rated for particulates
Environmental Precautions: Prevent entry into sewers, drains, watercourses, and soil to avoid ecosystem contamination
Cleanup Methods: Avoid raising dust, use damp methods or HEPA-filtered vacuum, collect in secure, labeled containers for disposal
Decontamination: Wash spill site thoroughly after material removal, monitor for cadmium/selenium residuals
Waste Disposal: Treat as hazardous waste under local, state, and federal regulations
Handling: Use only in controlled, well-ventilated areas with exhaust systems and dust controls, avoid spillage and minimize dust
Storage Conditions: Store in tightly closed containers in cool, dry, well-ventilated areas marked for toxic materials, away from acids and oxidizers
Engineering Controls: Use local exhaust ventilation or other engineering controls to keep airborne levels below recommended limits
Hygiene: Prohibit eating, drinking, and smoking in storage and work areas, wash thoroughly before breaks and after handling
Special Requirements: Clearly label storage areas, restrict access to trained personnel
Exposure Limits: OSHA PEL for cadmium compounds (as Cd): 0.005 mg/m3 (TWA), NIOSH REL: 0.002 mg/m3
Engineering Controls: Use fume hoods, glove boxes, and local exhaust systems; monitor air concentrations regularly
Respiratory Protection: NIOSH/MSHA approved respirators for dust/mist/fume if proper ventilation can't be assured
Protective Clothing: Chemical-resistant gloves, long-sleeve lab coats, protective shoes, face shield or safety goggles
Environmental Exposure: Control runoff and prevent release to the environment; procedures for accidental release must be established
Appearance: Dark red to black crystalline solid
Odor: Odorless
Melting Point: 1268°C
Boiling Point: Decomposes before boiling
Density: Approximately 5.82 g/cm3
Solubility: Insoluble in water; soluble in concentrated acids
Vapor Pressure: Negligible at room temperature
Flash Point: Not applicable
Auto-Ignition Temperature: Data not available
Molecular Weight: 191.38 g/mol
Partition Coefficient (n-octanol/water): Not established
pH: Not applicable
Chemical Stability: Stable under recommended storage conditions and in the absence of strong acids or oxidizers
Reactivity: Reacts with acids, forming toxic hydrogen selenide gas
Incompatible Materials: Strong acids, strong oxidizing agents, chlorine, hydrogen peroxide
Hazardous Decomposition Products: Cadmium oxides, selenium oxides, hydrogen selenide
Polymerization: Does not occur under normal conditions
Acute Toxicity: Oral LD50 (rat): ~25 mg/kg (as cadmium compounds)
Chronic Toxicity: Inhalation or ingestion may cause kidney and liver damage, respiratory illness, bone demineralization
Carcinogenicity: Classified as carcinogenic to humans (IARC Group 1, NTP, OSHA)
Mutagenicity: Evidence from animal studies suggests possible genetic toxicity
Reproductive Toxicity: Known to impair fertility and cause developmental toxicity
Routes of Exposure: Dust inhalation, ingestion, skin and eye absorption
Medical Conditions Aggravated: Pre-existing lung, kidney, or liver disorders
Symptoms of Overexposure: Chronic cough, chest pain, weight loss, nausea, anemia
Aquatic Toxicity: Very toxic to aquatic life, can accumulate in aquatic organisms and food chains
Environmental Persistence: Cadmium compounds resist natural decomposition, remain in soils and sediments
Bioaccumulation: Known to bioaccumulate in fish and shellfish, may impair ecosystem health
Mobility in Soil: Tends to bind tightly to soil particles, though leaching is possible under acidic conditions
Avoid Release: Prevent discharges into the environment, monitor wastewater and process effluents for cadmium/selenium
Hazardous Waste Status: Treat as hazardous waste (US EPA hazardous waste number D006 [Cadmium])
Disposal Methods: Dispose of material and contaminated packaging at licensed hazardous waste facility
Recommended Procedures: Use sealed, labeled containers; do not discharge into drains or surface water
Recycling Options: Recovery and recycling may be possible for industrial users with appropriate facilities
Waste Regulations: Follow all national, state, and local environmental control regulations
UN Number: UN2570
UN Proper Shipping Name: Cadmium compound, n.o.s.
Transport Hazard Class: Class 6.1 (Toxic substances)
Packing Group: III
Labeling: Toxic
Transport Precautions: Secure containers, prevent leaks, transport only by trained staff
Special Provisions: Notify carrier of hazard, emergency response information accompanies shipment
Regulatory Requirements: Comply with ADR, IMDG, IATA, DOT–hazard communication and segregation rules apply
OSHA: Covered under process safety management and hazardous communication standards
EPA: Listed as hazardous substance under CERCLA and RCRA, subject to release reporting, waste management requirements
TSCA: Listed in the Toxic Substances Control Act Inventory
EU REACH: Registration and restrictions required for use in Europe
IARC: Group 1 carcinogen (carcinogenic to humans)
Other Regulations: Subject to local and state workplace, environmental, and safety laws concerned with cadmium and selenium compounds
