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Substance Name: Dextran Standard 270000 delivers a high molecular weight polysaccharide derived from natural sources such as sucrose, shaped through fermentation processes by certain bacterial strains.
Common Uses: Analytical calibration, biochemical research, molecular sizing, and some pharmaceutical contexts, this compound steps into environments where precision and reproducibility are expected.
Appearance: White to off-white powder or lyophilized cake; odorless; dissolves in water to form a clear to slightly opalescent solution.
Chemical Formula: (C6H10O5)n, where n reflects its high polymerization degree.
Physical State: Solid, non-flammable under standard ambient conditions.
Hazard Class: Considered non-hazardous for common handling, but dust inhalation calls for precautions in poorly ventilated places.
Main Risks: May cause temporary eye or respiratory irritation if exposed to high concentrations of airborne dust; individuals with known sensitivities to polysaccharides might show mild reactions after contact.
Long-term Health Data: No established evidence links Dextran Standard 270000 to chronic human health concerns on regular laboratory exposure levels.
Main Component: Pure dextran, with a nominal molecular weight of 270,000 Daltons, built from glucose monomers linked mostly by α-(1→6) bonds and some α-(1→3) branching.
Impurities: Small fractions of lower or higher molecular weight dextrans and trace residual fermentation byproducts, typically accounted for in analytical grade specifications.
No Hazardous Additives: No toxic fillers, flavoring agents, or chemical stabilizers are known to be blended into research-grade supplies.
Eye Contact: Flush continuously with water if dust or solution accidentally enters the eyes. In my lab days, nobody enjoyed getting powders in their eyes, so goggles took care of most problems.
Skin Exposure: Wash hands with soap and water after any handling; most people report no issues, but washing off is good hygiene.
Inhalation: Move to a space with fresh air if powdered dextran gets inhaled and clean work areas thoroughly. Dry cough or mild irritation might follow, but symptoms fade quickly.
Swallowing: Rinse mouth with water; accidental small ingestion is unlikely to cause harm, since dextran has a long record of medical and food-related use in controlled forms.
Extinguishing Methods: Water spray, CO2, dry chemical powder, or foam squelches burning organic solids.
Combustion Hazards: Airborne dust from dextran could feed a flash fire under extreme conditions, rare in lab situations. The smoke carries standard combustion products: carbon oxides and water vapor.
Protective Gear: Firefighters use breathing apparatus and eye protection against heavy smoke or dust. For anyone storing kilos, decent ventilation and sealed containers cut way down on risk.
Personal Safety: Handle spill clean-up with gloves and avoid creating billowing clouds of dust.
Spill Response: Sweep or vacuum up powders gently, never dry-brush in closed rooms, as airborne starches can stay suspended.
Environmental Precautions: Dextran is biodegradable, so small amounts entering drains usually break down fast, though labs shouldn’t ignore local waste rules.
Safe Use: Work under fume hoods or ventilated benches when dispensing large quantities.
Storage Conditions: Store sealed in a cool, dry, and dark place; moisture and cross-contamination ruin test accuracy.
Personal Habits: Change gloves after handling and keep food and drinks out of work areas—common sense cuts down on a lot of unwanted surprises.
Containers: Use heavy-duty containers with tight lids; powder can clump if it absorbs water from air.
Engineering Controls: Fume extraction and dust containment in weighing or mixing stations drop exposure to practical zero.
Personal Protective Equipment: Standard work requires a lab coat, goggles, and lightweight chemical-resistant gloves.
Respiratory Protection: Dust masks or N95 respirators block powder inhalation during bulk handling.
Hygiene Practices: Hand-washing before leaving the lab and keeping dextran out of open food containers matter far more than most students expect.
Appearance: White or very pale yellow powder; sometimes a clear-to-opaque gel in water.
Solubility: Fully dissolves in water given time and moderate swirling.
Odor: Essentially odorless; no chemical smell or taste.
Melting Point: No clear melting; thermal breakdown or charring appears over 200°C.
Density: Bulk density runs between 0.5 to 0.8 g/cm3 as a powder.
Stability: Stable at room temperature in sealed, dry conditions.
Other Properties: Slightly sweet taste; pH in aqueous solution stays close to neutral.
Chemical Stability: Dextran keeps well in sealed, desiccated containers.
Conditions to Avoid: Moisture, persistent heat, and daylight degrade quality over time.
Material Incompatibilities: Strong oxidizers and some acids can cleave or burn the polymer, though few lab settings see these interactions.
Hazardous Outcomes: Under harsh heat or acid, dextran breaks down to smaller sugars and then chars, producing simple combustion gases.
Acute Effects: Lab-grade dextran rarely causes skin or respiratory problems unless a person is allergic or mishandles large, dry quantities.
Sensitization: Practically no reports of sensitization in normal research use, though the immune system always finds exceptions.
Dose Response: Animal studies and food packaging research show low toxicity at any realistic exposure; medical-grade forms have a long clinical record.
Chronic Health Data: No known cancer links or accumulative organ effects; years of lab life back this up.
Degradation: Dextran breaks down swiftly in water and soil as common bacteria use it as food.
Bioaccumulation: No evidence exists that dextran builds up in living things beyond basic sugar cycling.
Toxicity to Wildlife: Most environmental sources consider dextran benign to aquatic life at diluted concentrations.
Lab Waste Disposal: Small quantities enter regular laboratory solid waste streams; follow local university or state waste disposal codes.
Environmental Steps: Diluted aqueous solutions may be approved for drain disposal, provided water regulations are respected.
Bulk Quantities: Contact certified waste services for larger or contaminated batches—don’t just wash away dense or mixed waste.
Shipping Hazards: Non-hazardous according to most global transportation guidelines; no flammable, corrosive, or toxic hazard classifications.
Packing: Secure, moisture-proof containers defend against clumping and accidental spill.
Labeling: Keep labeling clear to avoid confusion with other white powders, especially in customs or school shared spaces.
International Standards: Dextran Standard 270000 does not appear on hazardous substance lists for major chemical regulatory bodies such as OSHA, REACH, or GHS.
Workplace Guidance: Standard chemical hygiene plans and PPE rules apply.
Usage Restrictions: Research-grade forms have broad approval in non-clinical work; special paperwork only comes into play if you’re moving shipping containers across borders.
SDS Compliance: Updating local procedures and keeping reference sheets on hand support transparency and safe work culture.
