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Product Name: Potassium Selenite
Chemical Formula: K2SeO3
CAS Number: 10102-18-8
Synonyms: Dipotassium selenite, Selenous acid dipotassium salt
Recommended Use: Laboratory reagent, nutritional additive
Manufacturer Details: Supplier information with address, phone, and emergency contact
Emergency Telephone: Provided by supplier for chemical emergencies
Product Code: Assigned by manufacturer or distributor
Classification: Acute toxicity (Oral, Inhalation, Dermal), Eye damage/irritation, Skin irritation
Hazard Statements: Harmful if swallowed, Toxic in contact with skin, Causes serious eye damage
Signal Word: Danger
Pictograms: Skull and crossbones, exclamation mark, corrosion
Precautionary Statements: Do not breathe dust or fumes, Wash skin thoroughly after handling, Wear protective gloves, eye and face protection
Other Hazards: May cause long term adverse effects in the aquatic environment
Chemical Name: Potassium Selenite
Synonyms: Dipotassium selenite
CAS Number: 10102-18-8
EC Number: 233-276-1
Concentration: 100% by weight for pure material or specify range for mixtures
Impurities: Contains no stabilizing additives, manufactured to reagent specifications
Inhalation: Move person to fresh air, keep at rest, give artificial respiration if not breathing, seek medical attention
Ingestion: Rinse mouth with water, do not induce vomiting, immediately contact a poison control center, provide medical assistance
Skin Contact: Remove contaminated clothing, wash affected area with soap and water, seek medical attention for persistent irritation
Eye Contact: Rinse gently with plenty of water for at least 15 minutes, seek immediate medical attention
Most important symptoms: Sore throat, nausea, vomiting, abdominal pain, skin redness, eye pain, severe irritation
Notes for doctor: Provide symptomatic treatment; selenium compounds can be highly toxic
Suitable Extinguishing Media: Dry chemical, CO2, water spray, or alcohol-resistant foam
Unsuitable Extinguishing Media: Avoid direct streams of water that may spread contamination
Hazards from Combustion: Releases selenium oxides, potassium oxides under fire conditions
Protective Equipment: Wear self-contained breathing apparatus and full protective gear
Firefighting Instructions: Move containers from fire area if safe, prevent runoff to water bodies, isolate hazard area
Flash Point: Not applicable due to salt nature
Personal Precautions: Evacuate area, restrict access, avoid dust, ventilate affected area, use personal protective equipment
Environmental Measures: Prevent spillage into drains, soil, surface water, and groundwater
Clean-Up Methods: Sweep up into suitable, labeled containers for disposal, avoid creating airborne dust
Containment: Cover with dry sand or absorbent material, collect spill promptly, dispose by licensed contractor
Handling: Avoid contact with skin, eyes, and clothing, use in well-ventilated areas, handle with care, avoid generating dust, seek training for safe handling of hazardous chemicals
Storage: Store in tightly sealed containers, in a cool, dry, well-ventilated location away from incompatible materials such as acids, strong oxidizers, and reducing agents, segregate from food and feedstuffs
Other Precautions: Keep away from heat, sources of ignition, out of reach of children and unauthorized personnel
Occupational Exposure Limits: OSHA PEL for selenium compounds: 0.2 mg/m³ (as Se), ACGIH TLV: 0.2 mg/m³ (as Se)
Engineering Controls: Use local exhaust or chemical fume hood, process enclosures for dust control
Personal Protective Equipment: Chemical-resistant gloves, safety goggles with side shields, long-sleeved clothing, laboratory coat, proper respiratory protection if ventilation is inadequate
Hygiene Measures: Wash hands before eating, drinking, or smoking; shower and change contaminated clothing after work
Appearance: White crystalline powder or granules
Odor: Odorless
Odor Threshold: Not determined
Melting Point: Decomposes before melting
Boiling Point: Not applicable
Solubility: Soluble in water
Density: Around 2.6 g/cm³ at 20°C
pH: Basic in aqueous solution
Vapor Pressure: Negligible at room temperature
Flash Point: Not flammable
Explosion Limits: Not explosive
Other: Hygroscopic, non-volatile
Chemical Stability: Stable under recommended storage conditions
Reactivity: Reacts with acids to release toxic hydrogen selenide gas
Conditions to Avoid: Exposure to moisture, heat, incompatibles such as oxidizers and reductants
Incompatible Materials: Strong acids, oxidizing agents, reducing agents
Hazardous Decomposition Products: Selenium oxides, potassium oxides, hydrogen selenide gas on reaction with acids
Polymerization: Does not polymerize
Acute Toxicity: Causes severe symptoms even at low doses (LD50 oral rat: 5 mg/kg)
Chronic Toxicity: Repeated exposure can affect liver, kidneys, and nervous system
Skin Irritation: Causes irritation, redness
Eye Irritation: Causes severe damage
Inhalation: Toxic by inhalation, can cause respiratory tract irritation, headache, nausea
Sensitization: No reports of skin sensitization
Carcinogenicity: Not listed as human carcinogen by IARC, NTP, OSHA
Mutagenicity: Suspected mutagenic effects in animal studies
Reproductive Toxicity: High doses affect reproductive organs in animal studies
Ecotoxicity: Highly toxic to aquatic organisms, low concentrations disrupt aquatic life cycles
Persistence and Degradability: Not readily biodegradable, selenium persists in soil and water
Bioaccumulation: Can bioaccumulate in aquatic and terrestrial food chains
Mobility: Soluble, migrates in water systems
Other Adverse Effects: Selenium buildup in ecosystems linked to deformities in fish and birds
Disposal Methods: Treat as hazardous waste, use a licensed hazardous waste disposal contractor, follow local, regional, and national regulations
Packaging Disposal: Containers must be triple-rinsed, punctured, and properly labeled before disposal
Contaminated Waste: Collect in clearly labeled, sealed containers for disposal
Do Not: Discharge into drains, watercourses, or the environment
UN Number: 3283
UN Proper Shipping Name: SELENITES, INORGANIC, N.O.S. (Potassium Selenite)
Transport Hazard Class: 6.1 Toxic substances
Packing Group: II (substances presenting medium danger)
Marine Pollutant: Yes
Labels: Toxic
Special Precautions: Ensure packaging is secure and correctly labeled, keep away from incompatible materials, emergency procedures in place during transit
DOT Regulations: Follows United States Department of Transportation rules for toxic substances
IATA / IMDG: Classified as toxic, special procedures for air and sea transport required
United States Regulations: Substance listed in TSCA Inventory, RCRA hazardous waste (toxicity characteristic), SARA Title III - Section 313 (Toxic chemical), OSHA hazardous chemical as defined by the Hazard Communication Standard
EU Regulations: Classified as hazardous, subject to REACH registration and reporting, included in Annex VI of EU CLP Regulation
Canada: Listed on the DSL and NDSL, WHMIS classification: D1A (very toxic material), D2A (very toxic), D2B (toxic)
Other Countries: Controlled under national environmental and chemical safety legislations
Labeling: GHS-compliant with hazard pictograms, signal word, hazard, and precautionary statements
Workplace Control: Employers must implement exposure controls, safety training, record-keeping, and provide ready access to MSDS for each chemical in use
