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Product Name: Yeast Selenium
Synonyms: Selenium-enriched yeast, Selenized yeast
Recommended Use: Nutritional supplement, feed additive
Manufacturer: [Insert Manufacturer Name]
Emergency Contact: [Insert Emergency Contact Number]
Chemical Formula: Not applicable (mixture/product derived from yeast biomass)
CAS Number: 7949-79-5 (yeast), 7782-49-2 (selenium element)
Address: [Insert Address]
Classification: Not classified as hazardous under GHS regulations in most jurisdictions, but selenium content may present health risks
Primary Hazards: Potential for respiratory and skin irritation arising from dust; ingestion of high quantities can cause selenium toxicity
Signal Word: Warning
Hazard Statements: May cause mild eye, skin, or respiratory tract irritation as dust; ingestion of large amounts may cause gastrointestinal upset, liver or nerve effects
Pictograms: Exclamation mark (if applicable due to dust or irritant properties)
Precautionary Statements: Avoid breathing dust; wash exposed skin thoroughly after handling; avoid direct contact with eyes; use only with appropriate ventilation
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Selenium Content (as selenomethionine): Typically 0.1%-0.3% by weight
Other Components: Saccharomyces cerevisiae biomass (yeast, >99%)
Impurities: Trace levels of inorganic selenium compounds may be present
Ingredient Description: Selenium is incorporated into the protein structure of the yeast; not present as free selenium or selenite in quality products
Additional Notes: Product does not contain other hazardous ingredients above regulatory thresholds
Inhalation: Move the affected person to fresh air promptly; seek medical attention for persistent cough or unusual symptoms
Skin Contact: Wash area thoroughly with soap and water; remove contaminated clothing
Eye Contact: Rinse eyes gently with plenty of water for several minutes; remove contact lenses if present and easy to do
Ingestion: Rinse mouth, give water to drink, and contact a medical professional; large or deliberate ingestion requires medical evaluation
Advice for Doctor: Treat symptomatically; selenium overdose may require monitoring for toxicity (gastrointestinal, neurological symptoms)
Suitable Extinguishing Media: Water spray, foam, CO2, dry chemical
Unsuitable Extinguishing Media: Strong water jets may scatter the material
Hazardous Combustion Products: Possible liberation of selenium oxides, sulfur oxides, and carbon monoxide at high temperatures
Protective Equipment: Use standard firefighting protective gear, including self-contained breathing apparatus
Fire/Explosion Hazards: Dust clouds may be capable of combustion under severe conditions, but yeast selenium is not highly flammable
Further Advice: Prevent contaminated runoff from entering sewers and watercourses
Personal Precautions: Wear protective mask, gloves, and eye protection to avoid contact with dust
Environmental Precautions: Prevent product from entering drains or natural water sources
Spill Cleanup Methods: Sweep or shovel solid material into containers for disposal; use vacuum extraction if possible
Disposal: Follow local environmental regulations
Further Actions: Ventilate area to dissipate dust; wash spill site after material is picked up
Handling: Avoid creating airborne dust; handle in well-ventilated environments; use gloves and goggles if handling bulk quantities
Storage Conditions: Store in a cool, dry, and well-ventilated location, away from direct sunlight and incompatible materials (oxidizing agents, acids)
Packing Requirements: Keep container tightly closed and properly labeled
Special Advice: Store away from animal feeds and foods unless for designated use; protect from moisture which can affect stability
Incompatibilities: Strong oxidizing agents or acids can react with selenium
Occupational Exposure Limits (OEL): Selenium compounds (as Se): OSHA PEL 0.2 mg/m3 TWA; ACGIH TLV 0.2 mg/m3 TWA
Engineered Controls: Use local exhaust ventilation in areas of high dust formation
Personal Protection: Protective gloves, dust mask or respirator (for bulk handling), safety glasses or goggles recommended
Hygiene Measures: Wash hands after handling; remove contaminated clothing and wash before reuse
Environmental Protection: Prevent release to natural water systems or drainage
Appearance: Light to medium brown, fine powder
Odor: Mild yeast odor
pH: 4.0 - 7.0 (10% suspension in water at 20°C)
Melting/Freezing Point: Not applicable (biological material)
Boiling Point: Not applicable
Flash Point: Not readily flammable
Flammability: May burn in presence of strong ignition source
Vapor Pressure: Not applicable
Solubility in Water: Insoluble; forms suspension
Bulk Density: Approximately 0.4 – 0.6 g/cm3
Other Data: No strong reactivity under normal environmental conditions
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: May react with oxidizing agents or strong acids to produce hazardous byproducts
Conditions to Avoid: Excessive heat, humidity, and incompatible chemicals
Hazardous Decomposition Products: Selenium oxides, carbon oxides, and sulfur oxides can be produced in a fire
Polymerization Hazard: No risk of hazardous polymerization
Incompatibilities: Contact with strong oxidizers or acids should be avoided
Acute Toxicity: Oral LD50 (rat) for yeast selenium is generally above 5,000 mg/kg; selenium is required in trace amounts, but toxicity appears at higher doses
Chronic Effects: Prolonged excessive exposure or ingestion can result in selenium toxicity (selenosis), characterized by hair and nail loss, gastrointestinal disturbances, neurologic symptoms, garlic breath
Inhalation: Dust inhalation may cause mild respiratory or throat irritation
Skin/Eye Contact: Dust causes slight irritation with repeated or prolonged exposure
Carcinogenicity: Selenium is not classified as a human carcinogen by IARC or EPA at nutritional exposure levels
Mutagenicity and Reproductivity: No evidence of mutagenicity or reproductive toxicity at typical doses
Ecotoxicity: Selenium accumulates in aquatic systems and can be toxic to wildlife at elevated concentrations
Persistence and Degradability: Yeast component biodegrades; selenium persists in environment if released in excess
Bioaccumulation Potential: Selenium can bioaccumulate in aquatic food chains
Mobility in Soil: Selenium compounds can migrate in soil and enter surface or groundwater
Other Adverse Effects: Avoid uncontrolled release to limit risk of environmental impact; small quantities as intended for use present minimal risk
Waste Disposal: Dispose of contents and container according to local, regional, national, and international regulations
Product Disposal: Small quantities may be disposed of with household or commercial waste; large amounts require review of selenium content and potential classification as hazardous
Packaging Disposal: Clean, empty containers may be recycled or disposed with regular waste; contaminated packaging may need special disposal
Waste Codes: Follow applicable codes for selenium-containing waste if exceeded regulatory thresholds
Precautions: Prevent release into water bodies; avoid landfill disposal of bulk quantities
UN Number: Not regulated under most transport requirements
UN Proper Shipping Name: Not classified as dangerous
Transport Hazard Class: Not assigned
Packing Group: Not assigned
Marine Pollutant: Selenium compounds may become hazardous in bulk aquatic release
Special Precautions for User: Secure packaging to avoid spills or dust generation during transport
Regulations: Follow local, national, and international transport guidelines for animal feed products
Labeling: Not subject to hazardous chemical labeling in most countries if selenium content remains within supplemental range
Inventory Listings: Listed or exempt on country-specific inventories such as TSCA (US), EINECS/ELINCS (EU), DSL (Canada)
Workplace Safety Regulation: Occupational exposure limits for selenium apply in most jurisdictions
Food and Feed Registration: Product typically registered for use as a feed ingredient; check local feed and food standards
Environmental Regulation: Disposal and release regulated under national hazardous substance control and waste regulations
Special Restrictions: National and international rules may limit maximum selenium content in feed and supplements; verify compliance before formulation or sale
