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Substance Name: Hydroxocobalamin
Chemical Formula: C62H89CoN13O15P
Description: Deep red to red-orange crystalline powder, this form of vitamin B12 stands out both for its unique pigment and its lifesaving applications, whether that means treating B12 deficiency or counteracting cyanide poisoning.
Synonyms: Vitamin B12a, Cyanokit antidote ingredient
Main Hazards: Hydroxocobalamin won’t catch fire easily or explode, but powder can irritate eyes and skin on contact. Breathing in dust may cause mild irritation. Unlikely to cause chronic issues when used as medically intended, but the red-orange stain will latch onto anything it touches—surfaces, clothing, and skin.
GHS Classification: Not classified as hazardous according to most global hazard standards, but carelessness can cause significant clean-up headaches.
Chemical Name: Hydroxocobalamin, typically exceeds 97% purity in pharmaceutical settings.
CAS Number: 13422-51-0
Active Ingredient: Hydroxocobalamin
Impurities: Only trace levels in regulated settings; composition monitored and controlled in drug-grade materials.
Inhalation: If someone breathes in hydroxocobalamin powder, move them to fresh air. Persistent discomfort needs a doctor’s visit.
Skin Contact: Wash well with soap and water—staining can be dramatic, but real toxic effects are rare. Sensitive folks might see light irritation.
Eye Contact: Flush eyes several minutes with plenty of clean water. Get medical help if the irritation sticks around.
Ingestion: Swallowing by accident usually doesn’t cause harm, since it’s used by mouth as a supplement, but medical attention never hurts if there’s any doubt, especially for large or unexpected amounts.
Suitable Extinguishing Media: Use anything appropriate for the surrounding fire—water spray, CO₂, foam, dry chemical all work.
Specific Hazards: Hydroxocobalamin won’t act as an accelerant, but decomposition by intense heating can churn out smoke, carbon monoxide, and other unpleasant byproducts.
Protective Equipment: Wear standard gear—goggles, gloves, and, for large fires, breathing apparatus.
Special Precautions: Red pigment in foam and water run-off can stain floors and drains, so watch out for environmental contamination on the clean-up end.
Spills: Ventilate and sweep up powder gently to avoid raising dust. Wet down large spills for easier clean-up. Wipe up with damp materials.
Personal Protection: Gloves and goggles protect you from stains and mild irritation. Wear a mask if dust clouds up.
Cleaning: Red dye lingers on any porous material; quick action with soap, water, and patience is best. Dispose of contaminated adsorbants according to local waste rules.
Environmental Caution: Unlike heavy metals, hydroxocobalamin breaks down, but don’t let it run into streams or sewers—big spills can inflame environmental worries and catch people off guard with red coloring.
Handling: Open containers carefully. Avoid generating dust or exposing to unnecessary heat or sun. Wash up after handling; even trace amounts stain.
Storage: Keep in a cool, dry, well-ventilated area. Tightly seal original container. Protect from moisture and light—both can degrade quality and color.
Incompatibilities: Avoid mixing with strong oxidizers and reducing agents.
Engineering Controls: Good ventilation makes a big difference in keeping inhalation risks low, especially in production and compounding spaces.
Personal Protection: Lab coat or apron, safety glasses, and gloves are the uniform. If you see visible dust, use a dust mask or respirator. Wash skin promptly.
Occupational Limits: No set OSHA or ACGIH exposure limits, but just because no regulation exists doesn’t mean you should work carelessly. Use basic common sense and keep spaces clean.
Appearance: Red to dark red crystalline powder. The saturated color is intense and unmistakable.
Odor: Odorless
Solubility: Water soluble, breaks into a vibrant red solution within seconds.
Melting Point: Decomposes rather than melts easily; exact figure depends on purity.
pH: Neutral to slightly acidic in water.
Stability: Sensitive to light; maintain dark storage to hold potency and avoid bleaching.
Stability Under Storage: Years of shelf life in sealed, dry, dark containers.
Reactivity: Not explosive, non-flammable, no violent reactions under normal conditions.
Decomposition: Strong light and heat break down the molecule and cause fading or loss of function.
Incompatibilities: Strong acids, bases, and oxidizing agents can degrade hydroxocobalamin rapidly.
Acute Effects: High medical doses show good safety margin. High oral amounts rarely produce side effects beyond mild GI upset.
Chronic Effects: No evidence of sustained harm from repeated exposures in vitamin supplementation. Allergic responses, while uncommon, may include rash or itching.
Eye/Skin Irritation: Staining is troublesome but not hazardous. Mild irritation may show up on sensitive skin.
Other Facts: Cyanokit (hydroxocobalamin for cyanide poisoning) uses much bigger doses than supplement users ever see, with short-lived side effects mostly tied to dye staining of skin, urine, and sometimes eyes.
Persistence: Hydroxocobalamin breaks down in soil and water over time, so it won’t linger for ages.
Mobility: Moves easily in water, meaning spills can reach further than you expect.
Bioaccumulation: Not expected to build up in wildlife or humans.
Aquatic Effects: Large amounts might briefly tint local waters, but environmental toxicity remains low.
Waste Management: Hydroxocobalamin shouldn’t hit the drain in bulk. Small, diluted amounts can go with compatible wastewater, but larger loads call for hazardous waste channels.
Contaminated Material: Treat absorbents, rags, and gloves soaked with hydroxocobalamin as chemical waste. Follow specific local rules and try to avoid landfilling stained debris.
Tips: Rinse spills down with lots of water only if permitted, avoiding impacts on local water bodies or wastewater systems.
Regulatory Status: Not considered a dangerous good for most shipping by land, air, or sea.
Packing: Pack in tough, sealed containers—spills stain cargo and trucks, sometimes leaving permanent marks.
Labeling: Shipping paperwork includes full chemical identification; staining hazard deserves mention, even if not a “transport danger” under law.
Pharmaceutical Use: Strictly governed by health agencies like FDA and EMA for purity, dosage, and labeling.
Environmental Regulation: Not a listed hazardous substance, but disposal in volume faces review under local chemical safety laws.
Worker Protection: Regulations focus more on worker skin and eye protection rather than inhalation dangers due to low volatility and toxicity.
