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Substance Name: Galactose
Chemical Formula: C6H12O6
CAS Number: 59-23-4
Physical State: White crystalline powder, odorless, easily mistaken for other sugars at a glance, and commonly handled in research labs or food ingredient processing.
Synonyms: D-Galactopyranose, Galactopyranose
Common Uses: Used in biochemistry for metabolic studies, as a component in lactose, and for research measuring enzyme activities like galactokinase.
Health Risks: Not classified as hazardous according to most global guidelines, though overexposure can irritate the respiratory tract or eyes due to dust. Workers in small labs sometimes forget airborne powder exposure remains a real risk for sensitive individuals.
Environmental Risks: Degrades in the natural environment; rarely raises red flags except with large spills, which are not typical.
Chronic Exposure: Chronic issues rarely surface with casual contact, though individuals with galactosemia must avoid even small exposures due to enzyme deficiency.
Main Component: D-Galactose, purity often exceeds 98%. Minor impurities typically arise from source material, but routine testing in food or research applications keeps them in check.
No Hazardous Additives: No toxic contaminants are introduced through standard commercial processing, making this sugar far less concerning than synthetic substances.
Inhalation: Move to fresh air. Anyone handling powders knows the discomfort of even mild respiratory irritation, so quick fresh air works best.
Skin Contact: Rinse with water. Prolonged exposure may cause mild irritation, rarely requiring more intervention.
Eye Contact: Irrigate eyes with clean water for several minutes; dust from any refined powder should always be removed this way.
Ingestion: Rinse mouth with water if accidental consumption occurs. Unless the individual has a metabolic disorder like galactosemia, ingesting normal quantities creates little risk.
Suitable Extinguishing Media: Water spray, dry chemical, carbon dioxide, foam. The risk is mainly from combustibility as a dust, a lesson anyone handling large bags of sugars in poorly ventilated rooms learns quickly.
Special Hazards: Dust can form explosive mixtures with air, a property that surprises many handling food-grade materials.
Protective Equipment: Standard fire-fighter protection—gloves, goggles, breathing apparatus—because burning organic powders emit irritating fumes.
Personal Precautions: Avoid creating dust. Laboratory technicians and shop-floor workers train reflexes to gently sweep spills rather than blow them around.
Environmental Precautions: Do not let powder enter drains or watercourses, not due to toxicity but to prevent localized blockages and cleanup headaches.
Methods for Cleanup: Sweep or vacuum up. Small clean-up jobs benefit from damp cloths to keep dust down; industrial settings should deploy HEPA filters.
Safe Handling: Use in well-ventilated areas, avoid inhaling powder. Proper storage means solid containers with tight lids, stored away from moisture.
Storage Conditions: Cool, dry environment. Hygroscopic substances like galactose clump and degrade in humidity, and anyone who's seen a forgotten bag turn into a brick knows why climate control matters.
Incompatibilities: Strong oxidizers and acids. Galactose itself doesn't react rapidly, but storage near aggressive chemicals invites unnecessary risk.
Engineering Controls: Fume hoods or local exhaust help in busy preparation areas with frequent weighing or mixing.
Protective Equipment: Dust masks or N95 respirators for those regularly handling bulk quantities. Goggles and gloves form a basic barrier that prevents eye and skin irritation in most scenarios.
Hygiene Measures: Wash hands after handling and before eating. Labs often display these reminders, and the advice earns its place among everyday best practices.
Appearance: White crystalline powder
Odor: Odorless
Melting Point: About 167°C
Solubility: Freely soluble in water
Boiling Point: Data not readily available—common for sugars
Vapor Pressure: Negligible at room conditions
pH: Neutral in aqueous solution
Chemical Stability: Stable at room temperature; degradation occurs with heat, acid, or over long-term exposure to moisture.
Hazardous Reactions: Combustion can produce carbon oxides.
Materials to Avoid: Strong oxidizing agents; sugars oxidize, sometimes leading to container fires or product spoilage.
Decomposition: Prolonged heating leads to caramelization and breakdown.
Acute Toxicity: Low. Studies confirm oral toxicity in mammals remains negligible unless administered in massive, unrealistic doses.
Chronic Toxicity: Attention needed for individuals with metabolic conditions like galactosemia, as inability to metabolize can result in toxicity.
Skin and Eye Contact: Mild, transient irritant only at high exposure levels. Many in food or research settings manage years with no incidents.
Sensitization: No record of allergic or sensitizing reactions in healthy populations.
Degradability: Readily biodegradable by microorganisms; poses low long-term risk in soil or water.
Bioaccumulation: Low. Natural, rapid breakdown means accumulation in wildlife doesn’t occur.
Aquatic Toxicity: No measurable effects on standard aquatic test organisms, a comfort for wastewater managers working near production plants.
Waste Handling: Small quantities dissolve in water and flow into drains without trouble. Larger-scale disposals join other food or lab waste streams.
Regulation: Ordinary sugar waste protocols apply; incineration produces carbon oxides, but composting or landfill also works.
Packaging: Reuse or recycle wherever possible. Single-use bags stack up, and transitioning to reusable containers benefits both budgets and the planet.
UN Number: Not regulated as a hazardous material.
Transport Regulation: Regular road, rail or sea freight suffices; shipments benefit from dry, sealed containers.
Spillage Risks: Main concern arises with broken packaging and resulting dust. Workers learn to protect respiratory tracts during large transfers.
Hazard Classification: Not classified as hazardous under major international frameworks.
Labeling: Basic ingredient labeling often suffices, with no specific hazard symbols; food and pharmaceutical regulations may demand more detail.
Restrictions: Enforced restrictions target only those with metabolic conditions; occupational exposure limits are not specified for galactose, but standard lab and food safety protocols work well.
