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Common Name: 5-(Hydroxymethyl)furfural
Chemical Formula: C6H6O3
Molecular Weight: 126.11 g/mol
Appearance: Yellow to light brown crystalline solid or viscous liquid, taking on a caramel-like scent that makes it stand out from many other chemicals sitting on the lab shelf.
CAS Number: 67-47-0
Usage: Often found in sugar processing, pharmaceutical research, and as a platform molecule for bio-based chemicals.
People see the name and might not realize they're looking at a compound built from the breakdown of sugars, showing up both in the food industry and in chemical synthesis circles.
Main Hazards: Can trigger irritation if it gets on the skin, eyes, or into the lungs. Known for causing discomfort rather quickly upon exposure.
Signal Word: Warning
Pictograms: Exclamation mark (for irritant and health hazard)
Routes of Exposure: Ingestion, inhalation, skin and eye contact
Affected Organs: Eyes, skin, respiratory tract
Potential Health Effects: Redness, soreness, watering of eyes, coughing, nausea, headaches. Those symptoms should prompt caution in labs or processing plants. It’s a common theme that people handling chemicals underestimate how subtle symptoms build up, serving as a reminder to take basic protections seriously.
Chemical Name: 5-(Hydroxymethyl)furfural (pure or near-pure form in most lab or industrial contexts)
Impurities: May include traces of related furfural derivatives, left over from manufacturing or breakdown.
Concentration: Usually provided as a pure substance without major additives.
Inhalation: Move outside to fresh air quickly, loosen restrictive clothing, and seek medical attention if any difficulty in breathing shows up.
Skin Contact: Wash affected area with plenty of water and soap, remove contaminated clothing, keep the skin clean and dry.
Eye Contact: Flush eyes with lukewarm water for at least 15 minutes, and don’t delay getting medical input if redness or pain sticks around.
Ingestion: Avoid inducing vomiting, rinse mouth, and get medical support so complications don’t set in.
Personal experience in small research labs reveals how often people put off seeking medical input when problems seem minor at first—something that needs changing through better safety culture and immediate attention to exposure.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, and, if nothing else works, water spray in mist form to avoid splashing.
Hazardous Combustion Products: Carbon oxides and irritating fumes ride up into the air if the chemical burns, a reminder to keep up with ventilation even after the flames are out.
Protective Equipment: Full protective gear and self-contained breathing apparatus, this is no place for shortcuts.
Advice for Firefighters: Cool nearby containers with water spray, and avoid direct contact with spilled material. Those who fought small lab fires can attest: You don’t get a warning shot with toxic fumes.
Spill Response: Ventilate the area, wear gloves and protective eyewear, use absorbent material to soak up liquid, and dispose safely in sealed, labeled containers.
Environmental Precautions: Don’t let this run off into drains, soil, or surface water. This chemical’s persistence in the environment is a good reason to install intercept drains and spill kits close to handling areas.
Personal Precautions: Limit exposure by isolating the spill zone and only letting trained personnel respond. My own time managing accidental spills taught me that containment and speed mean fewer headaches later.
Handling: Wear gloves and goggles, keep ventilation strong, and avoid open flames nearby. Build routines around these rules so risky shortcuts never become habits.
Storage Conditions: Tightly seal the container, place in a dry, cool place, and shield from direct sunlight.
Incompatible Materials: Avoid strong acids, bases, or oxidizers—unwanted reactions can run out of control.
Safety audits consistently show better outcomes not from the most expensive gear, but from clear labeling and well-drilled safety practices.
Engineering Controls: Local exhaust ventilation and fume hoods.
Personal Protection: Chemical-resistant gloves (nitrile, neoprene), splash-proof goggles, and lab coats.
Respiratory Protection: Use NIOSH-approved respirator in high concentrations.
Hygiene Measures: Wash hands before breaks, separate contaminated clothing for cleaning, and never eat or drink near workspaces.
Over the years, I saw the biggest barrier to consistent PPE use remains poor access or discomfort—so investing in comfortable, high-quality gear repays itself in reduced incidents.
Appearance: Yellow to amber crystals or viscous liquid
Odor: Caramel-like
Melting Point: Approximately 28 to 34°C
Boiling Point: About 114 to 116°C at reduced pressure
Solubility: Dissolves in water, ethanol, ether
Density: 1.243 g/cm³
Vapor Pressure: Low at room temperature
pH: Neutral to slightly acidic in water
Its sticky nature and low vapor pressure make it less prone to inhalation risks, though contact exposure remains a practical concern.
Chemical Stability: Stable in closed containers under recommended storage.
Reactivity: Reacts with strong oxidizers, risking heat and gas generation.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, and other organic fumes during breakdown.
Based on industry records, keeping stock in proper temperature and humidity prevents unwanted reactions, and it pays to check storage every few months for leaks or crystal formation near the lid.
Acute Toxicity: Moderate—can cause irritation on contact, nausea, and headaches if inhaled or ingested.
Skin and Eye Irritation: Well documented; redness and discomfort are common.
Chronic Effects: Prolonged exposure may stress kidney and liver function, based on animal studies.
Carcinogenicity: Evidence not conclusive in humans, although precaution is still warranted.
In research environments, health surveillance and regular checkups catch problems before they escalate, stressing the importance of ongoing vigilance rather than relying on one-time assessments.
Aquatic Toxicity: Known to impact aquatic organisms if allowed into waterways.
Persistence and Degradability: Moderately biodegradable under environmental conditions.
Bioaccumulative Potential: Low to moderate; not likely to build up extensively in the food chain.
Mobility: Mobile in soil and water, so spills can travel downstream fast.
Field case reports underscore that even small leaks can compound local water quality problems, especially near food or chemical processing sites. Improved secondary containment is critical.
Waste Treatment Methods: Collect spill and contaminated materials in labeled hazardous waste bins, transport to authorized facilities.
Avoid: Draining into sewer systems or releasing into the environment.
Regulatory Guidance: Adhere to local, regional, and national hazardous waste protocols.
Recommended Practice: Regular audits on disposal records and routine training go a long way—something too often overlooked until something goes wrong.
Proper Shipping Name: 5-(Hydroxymethyl)furfural
Hazard Class: Not classified as hazardous for most transportation channels, though certain concentration or volume levels may trigger requirements.
Packing Group: Usually III (low danger) where classified
Precautions: Secure packaging, prevent leakage, label clearly, and keep away from extreme temperatures.
People tasked with shipping should check current regulations at every handoff, because rules shift faster than most realize, and transport teams pay the price for oversight lapses.
Global Regulation: Subject to registration and reporting depending on volume and location.
OSHA (United States): Treated as a hazardous chemical in workplaces above threshold amounts.
REACH (European Union): Registration requirements for manufacturers and importers above certain quantities.
Workplace Labelling: Mandatory hazard communication, including clear signage in storage and handling zones.
Labs that maintain close records and anticipate regulatory changes build stronger reputations for safety and avoid penalties that follow publicized incidents.
