© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Selenium Tetrachloride
Chemical Formula: SeCl4
CAS Number: 10026-03-6
Synonyms: Tetrachlorosilane, Selencarbonyl tetrachloride
Recommended Uses: Chemical synthesis, laboratory reagent
Manufacturer: Supply company and address details
Emergency Contact: Emergency phone number for hazardous exposure or spill situations
UN Number: 3283
EC Number: 233-059-8
Hazard Classification: Acute Toxicity (oral, inhalation, dermal), Skin Corrosion/Irritation, Serious Eye Damage/Eye Irritation
Signal Word: Danger
Hazard Statements: Toxic if swallowed, inhaled, or absorbed through skin; causes severe skin burns and eye damage; may cause respiratory irritation
Pictograms: Skull and crossbones; Corrosive
Precautionary Statements: Avoid contact with skin, eyes, and clothing; wash exposed skin thoroughly after handling; do not eat, drink, or smoke during use; wear protective gloves, eye protection, and face protection
Routes of Exposure: Inhalation, ingestion, dermal, ocular
Target Organs: Eyes, skin, respiratory tract, gastrointestinal tract
Chemical Name: Selenium Tetrachloride
Concentration: 99% or higher
CAS Number: 10026-03-6
Impurities: Trace mineral chlorides, less than 1% by weight
Molecular Weight: 220.77 g/mol
Inhalation: Move person to fresh air; provide oxygen if breathing is difficult; seek immediate medical attention
Skin Contact: Remove contaminated clothing and rinse skin thoroughly with water for at least 15 minutes; seek immediate medical help
Eye Contact: Rinse cautiously with water for at least 15 minutes, lifting eyelids; seek immediate eye specialist care
Ingestion: Rinse mouth and do not induce vomiting; seek immediate medical advice
Important Symptoms: Severe irritation, redness, pain, burns, coughing, shortness of breath
Advice for Doctors: Treat symptomatically, monitor for delayed effects on respiratory tract or organ function
Suitable Extinguishing Media: Dry sand, carbon dioxide, dry chemical powder; never use water directly
Fire/Explosion Hazards: Decomposes at high temperatures releasing toxic chlorine and selenium oxides; reacts violently with water
Protective Equipment: Full protective gear including self-contained breathing apparatus
Special Procedures: Evacuate area, prevent water contact, use non-combustible barriers for containment
Hazardous Combustion Products: Hydrogen chloride, selenium fumes, selenium oxides
Additional Advice: Cool adjacent containers with water spray from maximum distance
Personal Precautions: Avoid dust formation; ensure adequate ventilation; evacuate unnecessary personnel; wear chemical splash goggles, gloves, and impervious clothing
Environmental Precautions: Prevent further leakage or spillage; avoid release to environment; do not allow to enter drains or watercourses
Spill Response: Neutralize spill with sodium bicarbonate or lime; absorb onto inert material such as dry sand; sweep up, contain, and dispose in approved chemical waste containers
Clean-Up Methods: Shovel up and transfer to a dry, sealed, labeled container for safe disposal; ventilate area and wash spill site after material pickup is complete
Decontamination: Use specific neutralizing solutions; avoid use of water or moist cleaning agents
Safe Handling: Handle in chemical fume hood; avoid breathing vapors or contact with skin and eyes; do not handle near food or drink
Storage Requirements: Store in tightly closed, corrosion-resistant containers under dry, inert atmosphere; keep separate from water, alcohols, and oxidizing agents
Incompatibilities: Moisture, strong alkalis, oxidizing materials, alcohols, metals
Specific Design: Keep storage containers labeled clearly; use secondary containment to prevent accidental release
General Hygiene: Wash hands thoroughly after handling; do not reuse contaminated clothing
Occupational Exposure Limits: No OSHA PEL, ACGIH TLV 0.2 mg/m3 for selenium compounds
Engineering Controls: Adequate local exhaust ventilation; mechanical exhaust strongly recommended; emergency eyewash and safety shower stations nearby
Personal Protection: Splash-proof safety goggles; chemical-resistant gloves (nitrile or neoprene); lab coat or impervious coverall; face shield for large volumes
Respiratory Protection: NIOSH-approved full-face respirator with acid gas/particulate cartridge in absence of adequate ventilation
Appearance: Colorless to yellowish-white crystalline solid
Odor: Sharp, acrid, chlorine-like odor
Melting Point: 192°C
Boiling Point: 346°C
Solubility: Reacts violently with water, soluble in carbon disulfide, chloroform
Vapor Pressure: 0.13 kPa at 25°C
Density: 2.56 g/cm3 at 20°C
pH: Not applicable (hydrolyzes in water)
Partition coefficient (n-octanol/water): Not available
Evaporation Rate: Not rapid; volatile under heat and dry air
Chemical Stability: Stable in dry, sealed containers at room temperature
Incompatible Materials: Water, strong bases, alcohols, oxidizing agents
Hazardous Reactions: Violent reaction with water producing hydrochloric acid and selenium dioxide; reacts with metals and organic materials
Hazardous Decomposition Products: Hydrogen chloride gas, selenium oxides
Conditions to Avoid: Exposure to air, humidity, high temperature, open flame
Routes of Entry: Inhalation, ingestion, eye and skin contact
Acute Effects: Corrosive to tissues, severe eye and skin burns, pulmonary edema, gastrointestinal distress
Chronic Effects: Chronic selenium toxicity may cause hair loss, nail changes, neurological effects
LD50 (oral, rat): 300 mg/kg
Carcinogenic Status: Not classified as carcinogenic by IARC, NTP, ACGIH
Sensitization: Not established
Additional Information: High vapor concentrations cause delayed lung injury and systemic effects with cumulative exposure
Environmental Fate: Hydrolyzes to oxide and acid in moist environments; persistent in soil as elemental selenium
Aquatic Toxicity: Highly toxic to aquatic organisms; produces selenium compounds that bioaccumulate and cause long-term effects
Mobility in Soil: Chlorinated selenium migrates in moist soil, risk of leaching into water table
Ecotoxicological Data: Selenium (VI) compounds known for high ecotoxicity
Degradation Products: Selenium dioxide, hydrochloric acid
Precaution: Prevent discharge to sewage, natural waters, or soil
Waste Nature: Toxic, corrosive chemical waste, regulated under hazardous waste laws
Disposal Methods: Collect residues and solutions in sealed containers clearly labeled for hazardous waste incineration or specialized chemical landfill
Container Disposal: Triple rinse with suitable neutralizer, puncture and dispose as hazardous material
Additional Requirements: Consult federal, state, and local environmental control regulations before disposal; do not attempt dilution or neutralization except by trained professionals
UN Number: UN 3283
Proper Shipping Name: Selenium tetrachloride
Hazard Class: 6.1 (Toxic substances)
Packing Group: II
Marine Pollutant: Yes
Special Precautions: Transport only in certified, tightly sealed containers with proper hazard labeling; avoid incompatible cargo, segregate from food and feedstuffs
Transport Regulations: Follow ADR, IMDG, and IATA guidelines for international and domestic shipments
TSCA Status: Listed on inventory
SARA Title III (Sections 302, 313): Reportable under extremely hazardous substances (EHS), listed as toxic release inventory (TRI) chemical
RCRA Status: Classified hazardous waste (D006, D010)
OSHA Status: Regulated hazardous chemical requiring hazardous communication standards
EPA Status: Subject to CERCLA reporting; minimum reportable quantity applies
Labeling Requirements: Corrosive, toxic, environmental hazard symbols mandated; clear hazard and precautionary statements
Other International Regulations: Subject to REACH and GHS in Europe and similar standards globally
