| Molecular Formula | BaH5NO3 |
| Molar Mass | 204.37 |
| Density | 3.180 |
| Melting Point | decomposes at 217℃ [HAW93] |
| Water Solubility | g Ba(NO2)2/100g H2O: 54.8 (0°C), 319 (100°C) [KIR78]; soluble alcohol [HAW93] |
| Physical and Chemical Properties | Chemical properties yellow-white hexagonal crystal. The relative density is 3.173. Soluble in water, solubility in water: 54.8g/100 gH2O at 0 ℃ and 319g/100 Gh2o at 100 ℃. Insoluble in alcohol, insoluble in acetone, and decomposes into anhydrous when heated to 115 ℃. |
| Use | It is mainly used as a reducing agent. Added in the reinforced cement can be used to protect the steel bar rust inhibitor. It can also be used as a diazotization agent for organic chemical reactions. |
| Risk Codes | R8 - Contact with combustible material may cause fire R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R20/22 - Harmful by inhalation and if swallowed. R50 - Very Toxic to aquatic organisms R25 - Toxic if swallowed R20 - Harmful by inhalation |
| Safety Description | S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S28 - After contact with skin, wash immediately with plenty of soap-suds. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2627 5.1/PG 2 |
| Raw Materials | Barium hydroxide Barium carbonate Barium chloride NITRIC OXIDE Barium nitrate Heating furnace BARIUM NITRITE |
| melting point | decomposes at 217℃ [HAW93] |
| density | 3.180 |
| morphology | yellow-white hexagonal crystals |
| water solubility | g Ba(NO2)2/100g H2O: 54.8 (0°C), 319 (100°C) [KIR78]; soluble alcohol [HAW93] |
barium nitrite dust enters the body due to breathing or ingestion, which can cause poisoning, leading to liver, stomach, esophagus, brain, lung, bronchus and other diseases. Operators should wear work clothes, work shoes and other protective equipment that meet the specified standards. Attention should be paid to dust prevention and dust removal in the production process. The operating room shall be equipped with air supply and exhaust equipment. The equipment used should be sealed, and the production process should be mechanized and automated.
The thermal decomposition method heats and decomposes barium nitrate. It is best to introduce nitric oxide gas into the heating furnace to obtain barium nitrite.
The metathesis method reacts equimolar sodium nitrite and barium chloride solution in an enamel reactor, and its
2NaNO2 BaCl2→Ba(NO2)2 NaCl
After the reaction is completed, it is evaporated, crystallized, and dried to obtain barium nitrite.
At high temperature, nitrogen oxide is passed into barium hydroxide solution or barium carbonate suspension for reaction to obtain barium nitrite.
| dangerous goods mark | O,Xn,N,T |
| hazard category code | 8-20/21/22-36/37/38-20/22-50-25-20 |
| safety instructions | 17-26-36/37/39-28-61-45 |
| dangerous goods transport number | UN 2627 5.1/PG 2 |
| WGK Germany | 3 |
| RTECS number | CQ9625000 |