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Name: Dulbecco’s Modified Eagle’s Medium, High Glucose
Main Use: Cell culture work, widely seen in research labs where growing, maintaining, and experimenting on animal or human cells is on the agenda
Core Components: Water, high-level glucose, amino acids such as L-glutamine, sodium chloride, potassium chloride, sodium bicarbonate, calcium chloride, magnesium sulfate, phenol red (a pH indicator), vitamins, and sometimes antibiotics
Overall Risk Level: Most lab staff consider it to have low health and environmental hazards; it doesn't fall under hazardous chemical labels for most handling situations
Health Alert: Eyes or skin can get irritated with repeated or prolonged contact, especially when the product is not handled with gloves; accidental swallowing could irritate the digestive tract
Environmental Awareness: Nutrient-rich content encourages microbial growth outside sterile environments, so accidental spills can be a risk for workspace contamination
Main Solvent: Water
Key Ingredients: D-glucose (high concentration around 4.5 g/L), various inorganic salts (NaCl, KCl, CaCl2, MgSO4, Na2HPO4), amino acids, vitamins (including biotin, riboflavin, pyridoxine, nicotinamide, and folic acid), sodium bicarbonate for buffering
Notable Additives: Phenol red for pH indicating, sometimes antibiotics and antimycotics for contamination control
Eye Contact: Flush eyes gently and steadily with water; keep eyelids open for best rinsing; seek medical support if redness persists
Skin Exposure: Wash area with mild soap and running water; remove any contaminated clothing
Ingestion: Rinse mouth; seek medical attention for ongoing discomfort or large-volume ingestion
Inhalation: Unlikely to be a risk due to liquid state and low volatility; support fresh air if splashing or mist generation has occurred
Flammability: Water-based formulation does not burn itself, but may support combustion of other substances due to organic ingredients
Recommended Extinguishing Tools: For surrounding fires, use water spray, foam, or dry chemical extinguishers
Hazardous Byproducts: Burning of dried residues may generate carbon monoxide, carbon dioxide, or nitrogen oxides; fire fighters should wear self-contained gear
Containment: Use absorbent material such as paper towels or cloths to soak up spills; prevent spreading onto desk equipment, culture materials, or drains
Clean Up: Disinfect surfaces after absorption, adopting standard lab decontamination practices
PPE Recommendations: Gloves and eye protection should reduce contact risks; spilled medium should be handled with care in areas with sterile work underway
Best Storage Environment: Refrigerators set between 2-8°C, out of direct sunlight, keeps the medium fresh and discourages bacterial growth
Handling Tips: Always handle in clean conditions, keeping containers sealed tightly; avoid pipetting by mouth and minimize splashing and aerosol generation
Dealing with Expiry: Check expiration dates; dispose of any old or clouded medium, as it loses effectiveness and may become contaminated
Recommended PPE: Laboratory coat, disposable gloves, and protective eyewear
Engineering Controls: Work in well-ventilated spaces or biosafety cabinets if sterility is crucial
Hygiene Rules: Wash hands after handling, avoid touching face, and keep food, drink, and unrelated items away from work area
Appearance: Reddish or pink clear liquid, shows color change with varying pH due to phenol red
Odor: Nearly odorless; some might notice a faint, sweet scent if paying close attention
Boiling/Melting Point: Close to water, given its high water content
pH: Usually buffered to range between 7.0 and 7.4
Solubility: Fully water soluble and mixes easily with other cell culture reagents
Chemical Stability: Remains stable in cool, dark storage and sealed bottles; loses stability with exposure to heat, light, or contaminants
Reactivity Risks: Moderate risk of chemical breakdown if mixed with strong acids, strong bases, or oxidizing agents
Decomposition: Spoilage possible with contamination—usually visible as cloudiness or pH change
Acute Effects: Typical exposures do not cause lasting harm; splashes or spilled droplets might lead to mild skin or eye irritation
Chronic Effects: Prolonged contact without PPE could dry skin or cause local irritation
Reporting: No evidence links Dulbecco’s medium to more serious toxicological risks or carcinogenic effects in humans
Environmental Persistence: Nutrient richness promotes microbial growth in sewers or watercourses, potentially affecting aquatic life
Bioaccumulation: Ingredients are expected to break down in the environment; no significant risk for bioaccumulation
Ecosystem Impact: Disposing of medium in moderate to large quantities without treatment may disrupt microbial balances in local waste systems
Lab Waste Handling: Decontaminate or autoclave spent or unused medium; discard as laboratory liquid waste according to institutional biosafety procedures
Environmental Care: Avoid pouring down regular drains, especially if mixed with cell materials, antibiotics, or hazardous additives
Packaging: Seal tightly in sturdy, leak-proof containers; label with appropriate identifiers
Shipping Status: Not classified as hazardous for road or air; take measures to keep cool during transit
Spillage During Transit: Clean up using absorbent material, disinfect affected surfaces, and follow local rules for safe handling
Workplace Rules: Standard chemical safety laws still apply for labeling, PPE, storage, and disposal
Hazard Listings: No major global chemical classification systems label Dulbecco’s as hazardous
Best Practice Suggestions: Review workplace policies on chemical hygiene, and stay updated on any changes to regulatory approaches on laboratory chemicals
