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Common Name: 2,6-Pyridinedicarboxylic Acid
Chemical Formula: C7H5NO4
Synonyms: Dipicolinic acid, Pyridine-2,6-dicarboxylic acid
Appearance: Fine white to pale yellow crystalline powder
Odor: No distinct odor
Molecular Weight: 167.12 g/mol
Hazard Statements: Sticking your hands in a jar of this powder isn’t something that brings immediate doom, but you don’t want it in eyes, lungs, or on skin repeatedly. Non-combustible by nature, but dust can irritate mucous membranes, and some people find their skin reacting over time. No wild fire risk here, but if too much dust swirls, inhalation could be unpleasant and might lead to short-term coughing or discomfort.
Health Hazards: Mildly irritating to skin, eyes, and respiratory tract on prolonged, repeated, or high-concentration exposure.
Symbol: Irritant (not toxic or corrosive at reasonable quantities)
Environmental Hazards: Not directly aquatic toxic or bioaccumulative, but runoff never benefits a nearby pond.
Main Ingredient: 2,6-Pyridinedicarboxylic Acid, over 99% purity in lab settings.
Impurities: Typical traces include other pyridine derivatives, usually less than 0.5% and rarely pose added risk.
Eye Contact: Rinse with clean water for up to 15 minutes and try not to rub. Medical attention only if irritation hangs around.
Skin Contact: Wash skin with soap and water. Take off any contaminated clothing and wash hands after handling.
Inhalation: Get to fresh air, sit down, and drink water if cough or trouble breathing continues; seek medical advice for prolonged issues.
Ingestion: Rinse mouth with water. A sip or two rarely produces dramatic effects, but large amounts mean a call to a professional is in order.
Suitable Extinguishers: Use standard foam, carbon dioxide, or dry chemical for the surrounding fire—not for the chemical itself.
Special Hazards: Decomposes into carbon oxides and nitrogen oxides if caught in a blaze above 250°C. Fumes don’t spell catastrophe, but breathing protection makes sense in a smoky room.
Protective Equipment: Firefighters working around stored powder need gloves, goggles, and breathing protection if smoke or fumes become an issue.
Personal Protection: Gloves and protective eyewear prevent most problems. Dust masks help for large spills.
Spill Response: Scoop up dry material—no wild vacuuming unless using HEPA filters. Damp cloth keeps dust down, then dispose in line with chemical waste rules.
Environmental Steps: Prevent from washing down drains or into sewers. Gather and dispose of waste to avoid roaming particulates.
Handling: Wear safety glasses and gloves every time—especially if working with open containers. Work in a ventilated space, avoid clouding the air, and keep food or drinks well away.
Storage: Store in sealed, labeled containers. Keep dry and out of direct sunlight. Ordinary room temperature preserves stability, but high humidity or extreme heat shortens shelf life by encouraging clumping or breakdown.
Incompatibility: Avoid mixing with strong bases or oxidizers to steer clear of unwanted side reactions.
Engineering Controls: Fume hood or well-ventilated space holds down dust levels. Work surfaces clean up with a damp cloth more easily than with broom or air blowers.
Personal Protective Equipment: Chemical-resistant gloves stand between you and skin irritation. Lab coats catch any unexpected spatter. Safety goggles keep powder clear of eyes, with face shields in the mix for bulk transfers.
Hygiene: Hand washing after work is not negotiable, and storing personal items far from the action keeps lunch edible.
Physical State: Solid powder
Color: White or off-white
Odor: Odorless
Melting Point: Between 237°C and 242°C
Boiling Point: Decomposes before boiling
Solubility: Moderately soluble in water, much more so in hot water; soluble in ethanol, poorly soluble in ether
pH (aqueous solution): Slightly acidic
Vapor Pressure: Negligible at room temperature
Density: About 1.5 g/cm³
Chemical Stability: Stable under most normal laboratory or warehouse conditions. Extended high heat or acid-base exposure leads to breakdown.
Reactivity: Reacts with strong oxidizers or bases, slowly anyway, but no spontaneous fireworks.
Hazardous Reactions: No dangerous polymerization expected. Decomposes to benign gases and acidic vapors at high enough temperatures.
Acute Toxicity: Swallowing even a small quantity tastes bitter and may upset your stomach, but requires much larger doses for worse effects.
Skin and Eye Effects: Prolonged or repeated contact can dry or irritate sensitive skin. Eyes react with tears and stinging, but not permanent injury.
Chronic Exposure: Prolonged dust inhalation can irritate the lungs, especially in dusty work environments.
Carcinogenicity, Mutagenicity, Reproductive Effects: No clear evidence links this compound to cancer or genetic damage in standard animal tests.
Sensitization: Allergic skin responses rarely appear in workers or lab users.
Ecotoxicity: Evidence shows limited direct aquatic toxicity at moderate concentration, but best practice keeps it out of waterways locally.
Persistence and Degradability: Breaks down slowly in soil and water, but doesn’t build up in living things.
Bioaccumulation: Not a significant risk in the broader food chain.
Mobility: Will move in water if spilled or washed away; controlling drainage from labs and warehouses leaves waterways cleaner.
Waste Treatment: Collect waste in clearly labeled, sealed containers. Follow local rules for hazardous waste pickup; landfill or incineration routes both work but usually require coordination.
Avoid Drain Disposal: Even with low toxicity, dumping down sinks or drains breaks the golden rule for any specialty chemical.
Cleanup: Scrub work areas thoroughly, avoiding dry sweepers that toss dust into the air or clog vacuums.
UN and DOT Status: Not flagged as dangerous goods in transit for most national or regional guidelines.
Packaging Standards: Keep sealed in sturdy, moisture-proof packaging for bulk or small-scale shipping. Label clearly.
Spill Control in Transit: Pad containers to prevent breakage and have cleanup kits on hand in case of jar or bag rupture along the way.
Labeling Rules: Basic hazard and safety labeling—eye and skin irritant warnings, general safety icons—meet the duty of care in most countries.
Global Inventories: Chemical appears on most major inventories such as the US TSCA, EU REACH, and Canadian DSL, so no secret risk or international restrictions on handling.
Workplace Safety: Provide access to safety data and training for any workers or students using the material; maintain records in accordance with national and local rules.
Community Right to Know: Facilities handling more than kilogram quantities often need to track and report storage levels for emergency planning in some regions.
