Cobaltous nitrate’s story has ties to the early days of inorganic chemistry, when chemists poked around for new bright pigments and metallurgists sought new alloys. This substance caught attention as scientists unraveled ways to isolate cobalt salts from various minerals. In the late nineteenth century, advances in mining cobalt from ores like erythrite and smaltite gave the world greater access to cobalt compounds. Early uses often leaned towards creating vivid blue hues in glassmaking and ceramics, reflecting the thirst for color during the industrial revolution. Over time, with the birth of analytical chemistry and modern industrial processes, cobaltous nitrate became more accessible, and got pressed into service for fields far beyond coloring pots and tiles.
Cobaltous nitrate, sometimes called cobalt(II) nitrate, shows up most often as a red to reddish-purple solid that’s pretty easy to dissolve in water or alcohol. Its commercial forms range from small, table-salt-like crystals to fine powders, tailored for the scale of use, from small research batches to multi-ton lots. It stands out because its solubility and vivid color make it an easy marker and reactant in labs and manufacturing.
This compound, with the formula Co(NO3)2·6H2O, carries a molar mass close to 291 g/mol in its hydrated form. Those red crystals lose water fast if left in dry air, morphing into a less hydrated state. Throw some heat at it and decomposition kicks in sharply, yielding cobalt oxide, nitrogen oxides, and lots of hissing and fumes—not something to leave unchecked in an open room. Cobaltous nitrate breaks down around 100°C if you push it, and its tendency to pull water from air means storage calls for care. It's also highly soluble in water—stir a few grams in a beaker and the solution runs a deep magenta. Its nature as an oxidizer draws extra scrutiny in industrial settings, since it reacts fast with reducing agents or organic material, potentially causing fires.
Commercial labels emphasize purity, hydration level, lot number, storage info, and hazard markings. Typical material rolls out of factories at about 98–99% purity for laboratory grade, and slightly lower for technical grade. Safety data sheets underline its oxidizing hazard, toxicity, and the importance of keeping it dry and sealed. Transporting cobaltous nitrate lands under hazardous material codes, thanks to its oxidizing and toxic properties, so manufacturers and users have to follow strict rules on documentation and packaging.
Industrial plants pump out cobaltous nitrate mostly by reacting cobalt metal, cobalt oxide, or cobalt carbonate with nitric acid. The process heads off with the raw mineral feed, which reacts briskly with nitric acid, giving off plenty of gas and heat. After the brewing finishes, chemists filter the solution to get rid of leftovers, crank up the concentration by evaporation, and let the hot liquid cool to crystallize the product. Washing and drying shape the final output, making sure no acid or byproducts linger. Lab prep follows the same route, but on scales that fit inside flasks instead of chemical reactors.
Cobaltous nitrate works as both a reactant and a source of nitrate ions in labs, making it useful for making other cobalt compounds like cobalt oxide. Dumping a base like sodium hydroxide into a solution of cobaltous nitrate leads to precipitation of cobalt(II) hydroxide, a pale blue solid. Heat this up and you get cobaltous oxide. It also serves a big role in coordination chemistry experiments, where students and scientists build out metal-ligand complexes for studies in catalysis or electronics. Its oxidizing power creates both opportunities and hazards—direct contact with organic matter or strong reducers sometimes leads to runaway reactions or fires. Chemical firms often use cobaltous nitrate to prep catalysts or dopants for ceramics and glass, tweaking the mixture with additives depending on what needs to be made.
Aside from cobaltous nitrate, labels on the market might read cobalt(II) nitrate, cobalt nitrate hexahydrate, or by its old-school name, cobaltous nitrate hexahydrate. In German-speaking labs, look for "Cobaltnitrat" or sometimes just "Kobaltnitrat". The CAS number (10026-22-9) serves as shorthand on shipping manifests, and academic papers stick to International Union of Pure and Applied Chemistry (IUPAC) conventions for clear identification.
Lab workers and plant technicians wear gloves, goggles, and lab coats when dealing with cobaltous nitrate. Its bright red color might tempt new students to handle it loosely, but skin contact or inhaling dust can spark allergic reactions or worse, bladder toxicity or other chronic health effects. Handling protocols include keeping containers closed, using fume hoods for weighing or pouring, and isolating storage from flammable products. Factories that turn out tons of this salt train their people in emergency procedures, regular medical surveillance, and keep detailed logs to trace any exposure events. Water from cleaning glassware must run through treatment to snatch up stray ions before the wastewater makes it out to municipal drains.
Cobaltous nitrate turns up in places many don’t expect: decorating glass and ceramics with unique colors, prepping catalysts that speed up petrochemical reactions, and surface treatments that improve steel’s resistance to corrosion. For artists, historical studios once used it to tint porcelain and glass with that unmistakable cobalt blue. In tech-heavy industries, companies use it to make magnetic materials, lithium-ion battery cathodes, and metal plating solutions. Environmental engineers tap it for soil and atmospheric studies, marking substances that move through complex chemical cycles. In teaching labs, it’s a go-to for illustrating transition metal reactions—its eye-catching color and reliable solubility win it fans among chemistry instructors. Beyond that, its nanotech applications keep expanding, from making specialty alloys for aerospace to research in hydrogen storage.
Ongoing research explores ways to swap out hazardous chemicals with cobaltous nitrate alternatives where possible, while process engineers design cleaner manufacturing routes. Scientists keep tinkering to lower waste and boost yields, especially since governments impose tighter limits on heavy metal discharge. Materials scientists fiddle with this salt in both bulk and nano form, trying to boost performance in batteries and catalysts. As battery demand keeps climbing, cobaltous nitrate influences the debate about ethical mining and recycling—making every gram count, stretching its reach across more batteries per mine. Analytical methods evolve to pick up traces of cobaltous nitrate in soil and water, driving regulatory enforcement and risk management in areas near mining and manufacturing plants.
Toxicologists track cobaltous nitrate for its effects on kidneys, the respiratory tract, and as a possible human carcinogen. Workers exposed to cobalt compounds over long periods show higher rates of allergic reactions, chronic respiratory conditions, and some organ damage, which makes strict exposure limits a must. Animal tests flag it as harmful even at low doses. The World Health Organization and European Chemicals Agency tag cobaltous nitrate as a substance of concern, and waste from manufacturing must meet strict disposal and treatment protocols. Community health monitors near plants that make or use cobaltous nitrate keep an eye on cobalt concentrations both in the air and groundwater, ensuring they stay under safety thresholds.
With the global surge in demand for lithium-ion batteries, cobaltous nitrate draws more attention as a source material for cathodes. Efforts to recycle batteries aim to grab cobalt from spent cells, which not only stretches supply but trims the need for new mining. Researchers want to perfect closed-loop processes that harvest and reuse cobaltous nitrate with minimal waste and risk. As nanotechnology branches out, this salt gets more play in catalysts and cutting-edge sensor materials. High-performance magnets, aerospace alloys, and environmental remediation projects carve new niches for cobaltous nitrate every year. At the same time, regulatory scrutiny fuels investments in safer handling and alternatives that cut exposure risk, ensuring that advances don’t come at the cost of community or worker health.
Cobaltous nitrate—bearing that signature deep red color—looks almost like it came from a chemistry set you’d find in a high school lab. I remember the first time I saw it; our chemistry teacher used it to show how easy it was to make crystals. What stuck with me is how this compound pops up across a wide range of places.
Cobaltous nitrate features most often in industrial and research settings. The world of battery production wouldn’t look the same without it. It acts as a key ingredient for those powerful lithium-ion batteries in phones, laptops, and electric cars. Finer details like energy density and longer lifespans depend on cobalt chemistry. The compound delivers cobalt ions that get baked into the cathode materials, boosting performance and keeping our devices running longer before needing a charge.
Walk into an art supply store or a porcelain shop, and you might see shades of blue perfected with a dose of cobalt. Before the jar gets to the artist’s hands, cobaltous nitrate often takes center stage in producing those rich, strong pigments seen in ceramics and paints. Think about ancient pottery glazes—many owe their vivid color to cobalt salts like this one. Even today, manufacturers rely on it for creating stable, beautiful blue colors that stand up to heat and time.
Chemical labs keep cobaltous nitrate within reach for experiments and as a reagent. I’ve seen it used to prepare other cobalt compounds or run tests that help determine how much ammonium is present in samples. It offers a useful shortcut for scientists tracking down intricate chemical puzzles.
Refineries and chemical plants look to cobaltous nitrate for catalyst production. Catalysts help chemical reactions move faster or use less energy. Companies producing plastics or breaking down crude oil for gasoline count on these reactions. Cobalt compounds help keep the flow steady and efficient, shaving off costs and getting products out faster. In my own work with labs, I’ve seen the difference a good catalyst makes—a sluggish reaction becomes manageable, schedules stay on track, and equipment doesn’t overload.
With so much value riding on cobaltous nitrate, the push for ethical sourcing grows year by year. Most of the world’s cobalt mines lie in the Democratic Republic of Congo. Stories of unsafe working conditions and exploitation surface often. Any business sourcing cobalt-based chemicals faces scrutiny from watchdogs and consumers alike. They want to know: How did you get your cobalt? I have worked on projects where we had to audit suppliers—not just for quality, but for labor standards and environmental safety. The extra step seemed like a headache at the time, but it helped our company avoid scandals and fines down the road.
Toxicity creates another layer of concern. Cobaltous nitrate can cause skin irritation, respiratory trouble, or worse with prolonged exposure. Shops using it for ceramics or pigments handle it with gloves and masks, and chemical labs stick to rigorous safety checklists. The environmental impact isn’t small either—runoff or improper disposal can pollute water and damage ecosystems.
Companies have turned to digital tracking and detailed supplier audits to make sure their cobaltous nitrate comes from ethical channels. Safe storage and waste treatment have become routine. Automation in handling promises less exposure to workers, and research on recycling old batteries could reduce pressure on new extraction. In my experience, transparency and smart regulation drive the biggest improvements—if everyone can see what goes into making and moving cobaltous nitrate, people push for better methods.
Cobaltous nitrate, often seen in laboratories and some manufacturing processes, raises a real question: how risky is it to health and the environment? My first experience with this compound was during a university chemistry class, where the instructor warned us to wear gloves and handle it in a fume hood. That caution wasn't just a routine reminder. This compound, with its bright reddish color, carries risks that folks working with chemicals shouldn't brush off.
Exposure to cobaltous nitrate doesn’t usually happen by accident. It mainly occurs in labs, battery manufacturing, and sometimes in pigment production. But contact can happen surprisingly easily, especially for workers who don’t have access to the right safety gear. Skin exposure or breathing in dust can cause rashes, asthma-like symptoms, or in some cases, chronic lung problems. Nausea and stomach issues pop up if someone ingests it.
One thing I noticed in occupational health literature—cobaltous nitrate often shows up linked to cancer studies. Agencies including the International Agency for Research on Cancer (IARC) suggest that long-term exposure increases cancer risk, particularly for lung cancer. The body absorbs cobalt compounds quite well through both inhalation and skin contact. Even small doses over years build up, creating serious risks for people working around it.
The story doesn’t end with humans. Cobaltous nitrate leaks can harm aquatic life and cause broader ecosystem trouble. Once in the soil or water, cobalt sticks around, being taken up by plants and fish. California’s environmental health groups flagged this collapse of the food web as a steady concern, pushing industries to find better waste control methods.
Manufacturers who depend on cobaltous nitrate for things like catalysts and ceramics can’t afford to ignore safety. There’s a real need for regular training sessions, up-to-date protective gear, and strong ventilation where the compound gets handled. Safety Data Sheets (SDS) spell things out, but more needs to happen at the ground level. I’ve seen good results in companies that run frequent safety drills and actually listen to feedback from staff who work on the production lines.
The biggest improvement comes from reducing unnecessary exposure. Companies should swap in safer alternatives where possible. Automated handling—robots moving and mixing chemicals instead of people—cuts down injuries. Waste management plays another key part. The less cobaltous nitrate leaks into drains and soil, the better the outcome for local communities. Neighbors and workers both gain when companies go beyond minimum legal rules.
Hospitals and clinics near plants using hazardous chemicals should get real-time information, so medical staff recognize symptoms early if something goes wrong. Bringing local health authorities into the conversation makes for faster and smarter responses.
Experience and studies agree: cobaltous nitrate isn’t a casual hazard. Workers, managers, and community members benefit most when everyone takes the compound’s risks seriously. Ongoing research will likely bring more alternatives and better handling tools, but until then, awareness mixed with personal protective equipment and smart planning stands as the strongest defense.
Cobaltous nitrate shows up in many labs and manufacturing sites because it works well as a catalyst and in pigment production. It comes as a reddish, crystalline solid that dissolves easily in water. The trick with this chemical is that it packs both toxic and oxidizing properties. I remember the first time I worked with the stuff in grad school—the instructor stressed safety to the point where it almost felt over the top, but after a few close calls elsewhere, that caution makes sense. Breathing in the dust or letting it touch your skin can irritate you pretty quickly. Runoff and leaks make their way into groundwater and create environmental headaches for local communities.
Most mistakes happen before anyone notices a missing label or an unlabeled beaker. The best way to store cobaltous nitrate starts with picking a storage room that never goes above room temperature. Humidity boosts the rate at which the chemical loses stability. Moisture from the air turns it clumpy and boosts the risk of accidental leaks and dust clouds, so keeping it tightly sealed is non-negotiable.
Every time I visit a site that stores chemicals, I check for containers and see if they're up to the task. A clear, sealed glass or high-density plastic container with secure lids always wins out over reused bottles. Some places still get this wrong and use metal tins that corrode with the nitrate, leading to even bigger risks. Having a well-maintained label for every bottle—listing the contents, concentration, date received, and hazard warnings—saves time, confusion, and safety drama later.
Cobaltous nitrate, being an oxidizer, works much better far away from any reducers or combustibles. I wouldn’t keep it anywhere close to paper, wood, or solvents. One small mix-up turns a storage shelf into a fire risk in no time. Dedicated shelving can help, with heavy stuff down low and chemicals like this one stored at eye level for quick access. Most seasoned lab workers have a story about incompatible chemicals causing damage—the point is, no one ever forgets those lessons.
Based on OSHA’s rules, every person in a lab or warehouse must know what to do if a spill or a leak happens. Emergency eyewash stations, gloves, and chemical-resistant aprons belong near chemical storage. In many places, regulators now push for annual training, and that helps. Knowing who to call, where the spill kits are, and how to evacuate the area makes all the difference. I’ve seen firsthand that solid emergency education works much better than hoping for the best.
Good chemical storage isn’t just about ticking boxes. It saves businesses from losses and communities from potential contamination. In recent years, accidental releases have led to costly cleanups and lost trust in several industries. The smart labs and factories have moved toward locked storage areas, digital tracking, and frequent site checks. Such habits also keep workplace morale high—everyone wants to go home healthy at the end of the day.
New storage tech—like humidity indicators, tamper-evident seals, and real-time air sensors—can help, but the basics stay the same: choose a dry, cool place, use the right container, store apart from reactive chemicals, and make training matter. My experience tells me that strict routines cut down on accidents and make for smoother audits. Safe storage isn’t rocket science, but it does need everyone to buy in, every day.
The chemical formula for cobaltous nitrate is Co(NO3)2. You’ll spot this compound in labs as red crystals or a powder, and to anyone who’s spent time handling salts and chemicals, its color comes as no surprise. Cobalt, sitting in the +2 oxidation state here, teams up with two nitrate ions.
Cobaltous nitrate doesn’t just sit on a shelf. Industries use it to dye ceramics and glass, produce inks, and prep catalysts. In my time working with specialty metal suppliers, the unique shade cobalt adds to glassware and pottery always grabbed attention—cobalt’s blue shades owe much to compounds like this nitrate. Technicians and artists both prize it for color stability, and it keeps popping up in pigment recipes that date back centuries.
This salt dissolves readily in water, so it blends well into solutions for synthesis. As a precursor to other cobalt salts, it plays a backbone role in research labs. Chemists count on its predictability in reactions—Co(NO3)2 provides a reliable source of cobalt ions, which is key in any process needing tight control over purity and reaction rates. Battery research benefits, too, as cobalt compounds drive advances in rechargeable cells. With electric vehicles and storage tech booming, interest in cobaltous nitrate production has soared.
No one should take its hazards lightly. Exposure to cobaltous nitrate can irritate skin, eyes, and respiratory passages. Chronic exposure raises bigger flags, including potential links to cancer. I’ve watched careful techs in industrial settings suit up—gloves, goggles, lab coats—because regulations demand a serious approach. These rules aren’t red tape. They save people from lasting harm.
The push for cleaner processes grows each year. Companies now look for ways to cut waste and recycle cobalt. Some have switched to closed-loop systems, recapturing and reusing cobalt to reduce environmental impact. Researchers are testing synthetic biology to recover metals from waste, promising less mining and fewer emissions.
Suppliers should provide clear training for anyone using cobaltous nitrate. I learned early that a prepared team means fewer accidents. Sites need emergency eye washes and showers nearby, and up-to-date safety sheets. In the classroom, students learn more than chemical equations; they get lessons in real-world responsibility.
Every time I see Co(NO3)2 on a shipping manifest or a lab shelf, it reminds me how closely chemistry connects to daily life. The product’s deep ties to industry and art, matched with real safety challenges, mean the formula isn’t just textbook knowledge. It shapes plastics, powers batteries, and brings color to everyday objects—all while demanding respect and careful stewardship from those who use it.
Anyone who’s ever opened a jar of Cobaltous Nitrate knows it’s not just another chemical. With its deep red hue and crystalline look, it catches the eye, but the stuff packs serious risks. It’s easy to miss that danger in a well-lit lab or supply closet unless you've read the safety sheets or seen what happens after a spill. Unlike common lab salts or mild chemicals, cobalt salts act as both chemical and health hazards that demand a clear head and a few layers of protection.
Direct contact with Cobaltous Nitrate doesn’t just dry out your skin or stain your clothes. It can trigger itchy rashes or cause chapping if your skin stays exposed. If it lands in your eyes, the pain sends you running for the eyewash in seconds. Good gloves (nitrile works well), goggles that fit, and a decent lab coat form the bare minimum setup. Lab regulars know the feeling: skip a step, and you pay for it by the end of your shift.
Breathing fine dust or fumes from this compound never leads to a better day at work. Once inhaled, cobalt can affect the lungs, sometimes in ways that stick around for months or years. Tossing a scoop of this powder in the air can leave anyone coughing, and chronic exposure has links to long-term lung damage, including asthma. Running fans doesn’t cut it—a fume hood with solid airflow means you’re actually working smarter, not tougher.
Even careful hands slip now and then. Drop a container or knock over a beaker, everything halts. You don’t sweep this stuff into the trash. Small spills need absorbent material and gentle, measured collection—no brushing or violent movements, since the dust drifts fast. All waste—paper towels, gloves, or powder—goes in a sealed, labeled hazardous bin. The moment you treat it lightly, someone else pays for it later. I’ve watched new lab techs panic during a spill; training and steady nerves sort out the mess quicker than bravado ever did.
Lab workers often groan at paperwork, but one missing label or unlogged handoff raises the risk for everyone. Cobalt salts sometimes blend with others or get mistaken when the bottles look alike. Proper labels and access to the safety data sheet make a world of difference. Safety audits and regular check-ins aren’t just busywork—they catch those weak spots before they lead to real harm.
Some folks wash up and still walk around with traces under their nails. Routine handwashing, even when gloves feel sturdy, wipes out any lingering dust or solution. No shortcuts, especially before food or drink. Years ago, I watched a colleague skip this step and spend a night in the ER—one mistake, endless regret.
Most labs that work with Cobaltous Nitrate build a safety culture that runs deeper than a training video. Regular talks about near-misses, updating safety data, and making sure protective gear sits within reach—not locked away—says plenty about workplace values. Management sets the tone, but every person on the floor takes ownership with every small decision. Sometimes it’s not about checking the rules but creating a place where looking out for each other feels as natural as breathing.


| Names | |
| Preferred IUPAC name | Cobalt(II) nitrate |
| Other names |
Nitric acid cobalt(2+) salt
Cobalt(II) nitrate Cobalt dinitrate Cobaltous nitrate Cobaltous dinitrate |
| Pronunciation | /koʊˈbæl.təs ˈnaɪ.treɪt/ |
| Identifiers | |
| CAS Number | 10141-05-6 |
| Beilstein Reference | 358960 |
| ChEBI | CHEBI:78059 |
| ChEMBL | CHEMBL1433269 |
| ChemSpider | 12419 |
| DrugBank | DB11337 |
| ECHA InfoCard | echa.europa.eu/substance-information/-/substanceinfo/100.028.255 |
| EC Number | 231-104-6 |
| Gmelin Reference | 14272 |
| KEGG | C02535 |
| MeSH | D003054 |
| PubChem CID | 101002 |
| RTECS number | GF5820000 |
| UNII | 44F29LR1V5 |
| UN number | UN1477 |
| Properties | |
| Chemical formula | Co(NO3)2 |
| Molar mass | 182.94 g/mol |
| Appearance | Red crystalline solid |
| Odor | Odorless |
| Density | DENSITY: 2.49 g/cm3 |
| Solubility in water | Very soluble |
| log P | -0.5 |
| Vapor pressure | 0.01 mmHg (25°C) |
| Basicity (pKb) | 8.2 |
| Magnetic susceptibility (χ) | +2900e-6 |
| Refractive index (nD) | 1.885 |
| Dipole moment | 4.61 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 165.6 J K⁻¹ mol⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -237.0 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | Std enthalpy of combustion (ΔcH⦵298) of Cobaltous Nitrate: -591.4 kJ/mol |
| Pharmacology | |
| ATC code | V09AX03 |
| Hazards | |
| Main hazards | Oxidizing, harmful if swallowed, causes serious eye irritation, may cause cancer, suspected of causing genetic defects, may cause allergy or asthma symptoms or breathing difficulties if inhaled, toxic to aquatic life. |
| GHS labelling | GHS02, GHS07, GHS08, GHS09 |
| Pictograms | GHS03, GHS07, GHS09 |
| Signal word | Danger |
| Hazard statements | H272, H302, H315, H317, H319, H334, H335, H341, H350, H360, H410 |
| Precautionary statements | P210, P220, P221, P264, P273, P280, P302+P352, P305+P351+P338, P308+P313, P370+P378, P501 |
| NFPA 704 (fire diamond) | 3-0-0-OX |
| Autoignition temperature | 400°C |
| Lethal dose or concentration | LD50 (oral, rat): 691 mg/kg |
| LD50 (median dose) | LD50 (median dose): 691 mg/kg (oral, rat) |
| NIOSH | MW38500 |
| PEL (Permissible) | PEL: 0.1 mg/m3 |
| REL (Recommended) | 300 kg |
| IDLH (Immediate danger) | IDLH: 20 mg/m³ |
| Related compounds | |
| Related compounds |
Cobalt(II) chloride
Cobalt(II) sulfate Nickel(II) nitrate Iron(II) nitrate |