Calcium nitrite is an inorganic compound with the chemical formula Ca (NOtwo)twoIt is widely used in reinforced concrete engineering, mainly as cement hardening accelerator and antifreeze and rust inhibitor.
Chinese name
Calcium nitrite[1]
Foreign name
Calcium dinitrite[1]
chemical formula
Ca(NOtwo)two
molecular weight
one hundred and thirty-two point zero eight nine[1]
Appearance: colorless to yellowish crystalline powder
Solubility: easily soluble in water, slightly soluble in ethanol[1]
Calculate chemical data
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Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 0[1]
Number of hydrogen bond receptors: 6[1]
Number of rotatable chemical bonds: 0[1]
Number of tautomers: 0
Topological molecular polar surface area: 105[1]
Number of heavy atoms: 7[1]
Surface charge: 0[1]
Complexity: 7.5[1]
Number of isotope atoms: 0[1]
Determine the number of atomic structure centers: 0[1]
Number of uncertain atomic structure centers: 0[1]
Determine the number of chemical bond structure centers: 0[1]
Number of uncertain chemical bond structure centers: 0[1]
Number of covalent bond units: 3[1]
purpose
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It is widely used in reinforced concrete engineering, mainly as cement hardening accelerator and antifreeze and rust inhibitor.
First aid measures
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Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water.
Eye contact: Lift the eyelid and flush with flowing water or physiological saline.Get medical attention.
Inhalation: quickly leave the site to a place with fresh air.Keep the respiratory tract unobstructed.If breathing is difficult, give oxygen.If breathing stops, perform artificial respiration immediately.Get medical attention.
Ingestion: drink enough warm water to induce vomiting.Get medical attention.
Protective measures
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Respiratory protection: When the concentration in the air is high, you should wear a self-priming filter type dust mask.Wear self-contained breathing apparatus when necessary.
Eye protection: wear chemical safety goggles.
Body protection: wear polyethylene gas protective clothing.
Hand protection: wear rubber gloves.
Others: After work, take a shower and change clothes.Keep good hygiene habits.
Leakage emergency treatment
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Isolate the leakage contaminated area and restrict access.It is recommended that emergency personnel wear dust masks (full face masks) and gas suits.Do not allow the leakage to come into contact with reducing agent, organic matter, inflammables or metal powder.
Small amount of leakage: wash with a large amount of water, and put the diluted washing water into the waste water system.
Large amount of leakage: collect and recycle or transport to waste disposal site for disposal.
Handling and storage
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Precautions for operation: close operation and strengthen ventilation.Operators must be specially trained and strictly abide by the operating procedures.It is recommended that operators wear self-priming filter type dust masks, chemical safety goggles, polyethylene gas suits and rubber gloves.Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace.Avoid dust generation.Avoid contact with reducing agents, acids and active metal powders.Load and unload gently during transportation to prevent damage to packaging and containers.Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided.Empty containers may leave harmful substances.
Precautions for storage: store in a cool and ventilated warehouse.Keep away from kindling and heat sources.The package shall be sealed and shall not contact with air.It shall be stored separately from reducing agent, acid and active metal powder, and mixed storage is strictly prohibited.The storage area shall be equipped with appropriate materials to contain leakage.
Packaging method: two layers of plastic bags or one layer of plastic bags outside gunny bags, plastic woven bags, latex cloth bags;Composite plastic woven bag outside the plastic bag (polypropylene three in one bag, polyethylene three in one bag, polypropylene two in one bag, polyethylene two in one bag);Screw mouth glass bottles, iron cap pressure mouth glass bottles, plastic bottles or ordinary wooden boxes outside metal barrels (cans);The threaded glass bottle, plastic bottle or tinned sheet steel barrel (can) is covered with a full floor lattice box, fiberboard box or plywood box.
Precautions for transportation: during railway transportation, the dangerous goods shall be loaded in strict accordance with the dangerous goods loading table in the Dangerous Goods Transportation Rules of the Ministry of Railways.It shall be transported separately, and the container shall not leak, collapse, fall or be damaged during transportation.The transport vehicles shall be equipped with corresponding types and quantities of fire-fighting equipment.It is strictly prohibited to transport together with acids, inflammables, organics, reducing agents, spontaneous combustion materials, inflammables in wet conditions, etc.During transportation, the speed should not be too fast, and forced overtaking is not allowed.Transport vehicles shall be thoroughly cleaned before and after loading and unloading. It is strictly prohibited to mix with organic substances, combustibles and other impurities.
