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Chemical Name: Sodium Acetate Buffer Solution
Common Uses: Many research labs and industry settings rely on this buffer to stabilize pH in biochemical applications, DNA precipitation, and some cleaning formulas.
Main Components: Made by mixing sodium acetate, acetic acid, and distilled water.
Appearance: Clear, colorless liquid without a strong smell.
Typical Concentration Ranges: Solutions range from 0.1 to 1 M depending on application.
Main Hazards: Sodium acetate buffer scores low on physical and health risk in diluted form. Direct skin or eye contact may cause irritation. Inhaling the mist could cause mild respiratory discomfort. Swallowing large volumes leads to gastrointestinal disturbance.
Symbol: Not classified as hazardous by most major agencies in typical lab concentrations.
Long-term Hazards: No evidence links regular exposure in normal laboratory conditions to chronic health effects.
Sodium Acetate: CAS No. 127-09-3, usually about 5-10% by volume.
Acetic Acid: CAS No. 64-19-7, forms part of the buffer, present in very small amount for pH adjustment.
Water: Used as the solvent, typically deionized.
Ingestion: Rinse mouth and drink water—seek help if a large amount gets swallowed or symptoms show up.
Inhalation: Breathe fresh air, move to well-ventilated place.
Skin Contact: Rinse skin under running water, remove contaminated clothing if discomfort or irritation occurs.
Eye Contact: Wash eyes thoroughly under running water for several minutes, seek help if irritation remains.
Flammability: Sodium acetate solution does not catch fire easily. Highly dilute; water content suppresses ignition.
Suitable Extinguishing Media: Water spray, carbon dioxide, foam, or dry chemical.
Protective Gear: Standard protective equipment for structural fire fights—no unique hazards.
Hazardous Combustion Products: If burnt, forms carbon oxides and sodium oxides in trace amounts.
Personal Protection: Wear gloves, goggles, and a lab coat.
Environmental Precautions: Small spills dilute readily and rarely pose a major risk, but avoid large unauthorized releases to drains.
Clean-up Practices: Soak up with absorbent material like paper towels, wash area with water.
Handling: Use in areas with ventilation. Don’t eat or drink while working and avoid unnecessary contact.
Storage: Store in tightly sealed bottles, away from heat sources and acids. Keep out of direct sunlight and label containers clearly.
Incompatibles: Strong acids, oxidizers.
Ventilation: Normal lab ventilation is usually enough.
Eye Protection: Safety goggles help protect eyes from accidental splashes.
Hand Protection: Nitrile gloves work well.
Other Gear: Standard lab coats keep clothing and skin safe.
Exposure Limits: No established limits for routine lab use.
Appearance: Clear, odorless liquid.
Odor: Faint vinegar odor if any acetic acid remains.
pH Range: Usually between 3.5 and 6.0, depending on formulation.
Boiling Point: Close to water.
Solubility: Fully dissolves in water.
Viscosity: Similar to water.
Stability: Shows good shelf life under recommended storage.
Reactivity: Does not react with glass, common lab plastics, or steel. May react with strong acids or oxidizers.
Hazardous Decomposition: At high temperatures, can form small amounts of irritating gases (acetic acid vapor, carbon oxides).
Acute Toxicity: Low in typical lab concentrations. Large doses can lead to stomach pain or burning sensation.
Chronic Effects: With normal and brief exposures, typical use does not bring long-term health impacts.
Route of Exposure: Can enter the body by swallowing, touching skin, or breathing aerosol.
Eye and Skin Contact: Direct, concentrated contact could irritate eyes or sensitive skin.
Toxicity to Aquatic Life: Sodium acetate in buffer strength poses minimal ecological risk if diluted and released in small quantities. In high concentration, can alter pH of water and harm small aquatic life.
Mobility: Moves easily in water.
Persistence and Degradation: Rapid breakdown in environment; both sodium and acetate show low toxicity after dilution.
Disposal: In many countries, dilute sodium acetate buffer can go down regular drains with plenty of water, following local rules. High-volume users or those near sensitive areas funnel old or unused buffer to chemical waste for proper treatment.
Avoid: Dumping into streams, lakes, or areas with delicate plants.
Classification: Considered non-hazardous in small containers for road, rail, and air transport.
Packing Group: Not regulated for most shipping circumstances.
Precautions: Double-check with your shipper if moving large containers or unusually concentrated solutions—rarely an issue for research use.
Global Harmonization: Most regulatory frameworks do not designate sodium acetate buffer as a hazardous material.
Workplace Safety: Labs and workplaces set their own best practices based on practical experience and guidelines drawn from studies on acetic acid and sodium compounds.
General Regulatory Status: Common buffer ingredients see use in food and pharmaceutical industries, owed to their demonstrable history of safe use.
