| Name | nitric oxide |
| Synonyms | oxoamino oxoazanide nitric oxide nitrilooxonium nitrogen monoxide |
| CAS | 10102-43-9 |
| EINECS | 233-271-0 |
| InChI | InChI=1/NO/c1-2/q-1 |
| Molecular Formula | N2O |
| Molar Mass | 44.01 |
| Physical and Chemical Properties | Characteristics of colorless, odorless gas. Its liquid is blue. melting point -163.6 ℃ boiling point -151.8 ℃ solubility it has little solubility in water, but its solubility in nitric acid aqueous solution is many times greater than that in water, and increased with the increase of nitric acid concentration. Soluble in sulfuric acid, ethanol, ferrous sulfate and carbon disulfide. |
| Use | Used as an anesthetic, preservative, can also be used for atomic absorption and combustion |
| Raw Materials | Sulfuric acid Ammonium nitrate Sodium nitrite |
| Downstream Products | Sodium nitrate Sodium nitrite |
nitric oxide is a colorless, odorless, highly toxic gas. Its liquid is blue. Melting Point -163.6 °c, boiling point -151.8 °c. It has little solubility in water, but its solubility in nitric acid aqueous solution is many times greater than that in water, and increases with the increase of nitric acid concentration. Soluble in sulfuric acid, ethanol, ferrous sulfate and carbon disulfide. The gas density was 1.3402kg/m3 in the standard state. Liquid density (151. 75 ℃.101. 325kPa)11 300kg/m3. Nitric oxide has a single electron paramagnetic free radical, and its reactivity is low. Relatively stable at room temperature. Nitrogen oxide is generated when nitrogen dioxide is encountered. Nitric oxide and oxidation easily, the formation of brown nitrogen dioxide. Can decompose nitric acid, itself is oxidized to nitrogen dioxide. At high temperatures, nitrate can be reduced to nitrite and ammonia dioxide is evolved. Nitric oxide can combine with certain metal salts, such as ferrous sulfate, to form dark brown iron nitroso sulfate. No reaction with dilute alkali solution. Upon heating to 700 °c, decomposition to nitrogen and oxygen began. The decomposition was intense at 1200 °c. Nitric oxide does not support combustion. Structurally unsaturated, so there is an addition reaction occurs. Nitric oxide and sulfuric acid produce "cyanic acid" (H2SO4 no) under pressure.
This product contains N20 not less than 95.0% (ml/ml).
This product is colorless gas; No significant odor, taste slightly sweet; Heavier than air.
This product at 20°C and pressure 101.3kPa(760mmHg), soluble in water or ethanol, dissolved in ether.
used for oxidation in semiconductor production, chemical vapor deposition process, and used as a standard mixture for atmospheric monitoring. Also used in the manufacture of nitric acid and silicone oxide films and carbonyl nitrosyl. It can also be used as a bleaching agent for rayon and a stabilizer for propylene and dimethyl ether.
hazard code: toxic gas. GB 2.3 class 23009. Highly toxic GA 58. 93A1055. UNN0.1660; IMDG CODE page 2162, Class 2.3. Collateral Hazard Class 6.1. Is a blood poison, the conversion of oxyhemoglobin for denatured hemoglobin and cyanosis, so that the brain is damaged to produce paralysis and spasm. In the case of mild poisoning, the symptoms disappeared after moving to fresh air. Because nitric oxide in the air quickly become nitrogen dioxide, the latter is also toxic to the human body, the lung tissue irritation and corrosion, causing pulmonary edema. Chronic effects are mainly manifested as neurasthenia syndrome and chronic respiratory tract inflammation. Individual pulmonary fibrosis. In addition, dental erosion may also occur. Immediately after contact with the eye and skin, rinse with running water for more than 15 min. After inhalation, you should quickly move to a place with fresh air to keep the respiratory tract clear. Oxygen, artificial respiration, cardiac compression and first aid were given if necessary. Work should wear work clothes, protective glasses and gloves. The production equipment shall be strictly sealed to provide adequate partial and total ventilation. When the concentration in the air exceeds the standard, must wear a gas mask, if necessary, wear positive pressure self-contained breathing apparatus. The maximum allowable concentration in air is 5mg (NO2)/m3. Use pressure cylinder filling. The label of "toxic gas" must be applied. Should be stored in a cool and ventilated warehouse, storage temperature should not exceed 30 ℃. Keep away from fire and heat source. Protection from direct sunlight. It shall be stored and transported separately from oxidants, oxygen, compressed air, flammable and combustible materials, etc. Light load and light load shall be carried in accordance with the prescribed route. Do not stay in residential areas and densely populated areas. Air and rail transport is strictly prohibited. Fire with dry powder, carbon dioxide fire extinguishing.
take 0.3 of Methyl red indicator solution and of bromothymol blue indicator solution respectively, add 400ml of water, boil for 5 minutes, let it cool, separate 100ml of Methyl red indicator solution respectively, put them into 3 Cuvettes of methyl, B and C, B tube plus hydrochloric acid titration solution (O.Olmol/L)0.2, add hydrochloric acid titration solution (0.01mol/L)0.4 in C tube; Then pass the product in B tube 2000ml (speed of 4000ml per hour), the color of tube B should not be darker than the orange-red color of tube C or the yellow-green color of tube A.
take 5000 ~ 10000ml of this product to wash the device through (1) saturated sulfuric acid solution of chromium trioxide,(2) solid potassium hydroxide,(3) phosphorus pentoxide, etc, after passing through a tube storing iodine pentoxide dried at 200°C and keeping the temperature at 120°C, the precipitated iodine vapor is introduced into a conical flask storing potassium iodide test solution, re-introduction of carbon monoxide-free air (which can be passed through a cuprous chloride solution to remove carbon monoxide) 5000ml to drive off residual carbon monoxide in the instrument, after passing through a tube storing iodine pentoxide, titration with sodium thiosulfate titration solution (0.002mol/L), and the result of the titration is corrected by blank test with 5000ml of air without carbon monoxide. Each 1 ml of sodium thiosulfate titration solution (101.3 md/L) corresponds to 0.112ml of CO at 25°C and 0.002 kPa(760mmHg) pressure. This product contains carbon monoxide shall not exceed 0.005% (ml/ml).
The clear barium hydroxide test solution 50ml is placed in the colorimetric tube, and the product is 1000ml. In case of turbidity, the test solution is compared with the control solution (0.10g of sodium bicarbonate is taken and the freshly boiled cold water is added, take out 1.0ml, plus a clear barium hydroxide solution made of 50ml) comparison, not more concentrated.
2 cuvettes A and B were respectively added with 1 ml of silver nitrate solution and 50ml of water. After shaking well, 2000ml of human product was passed through the tube a; The tube a should be clarified as well as the tube B.
take two cuvettes A and B, add 15ml of newly prepared potassium iodide starch indicator solution respectively, add 1 drop of glacial acetic acid to make it acidic, and pass 2000ml of human product through the nail tube; the color of the tube should be the same as that of the B tube.
Take 2 cuvettes A and B, add 50ml of water and 0.02 ml of potassium permanganate titration solution (0.20 mol/L) respectively, and inject of this product into the tube A; the color of the tube should be the same as that of the B tube.
take the device under the arsenic salt test method (General rule 0822 method 1), remove Erlenmeyer flask A, and place A piece of mercuric chloride test paper on the top plane of stopcock D, slowly through the product 2000ml; Mercury chloride test paper shall not generate spots.
take the storage of phosphorus pentoxide absorption tube, through the people of this product, so that the air drive all, weighing; Then through a certain amount of this product, weighing; this product per 1000ml containing water should not exceed 2mg.
determination of dry instrument, inverted, open piston C, close piston B, take a thin rubber tube, from the storage bottle siphon water, rubber tube and pipe E connection, make the piston B above the liquid level of the water bottle, open the piston B, slowly lower the instrument, make the water fill the hole of the piston B, immediately close the piston B, correct the instrument, make the piston B on, the piston B is rotated to communicate the conduit D with the glass tube A. After several minutes, close the piston C quickly, close the piston B again, keep the instrument position below the liquid level of the water bottle, and micro-open the piston B, place a few drops of water, close piston B, shake, then open piston B, put a little water, close piston B, shake. Open the piston C, release most of the water in the glass tube A, close the piston C, do not discharge the water, so as not to enter the air, then open the piston B, put A little water, shake, release water, repeated operation for many times, until the product is completely dissolved, the volume of gas in glass tube A is no longer reduced. At this time, both the piston B and C are closed, and the rubber tube of the water bottle is connected to the conduit F or G, the air in the channel of the piston C is removed with water, the instrument is lifted, and the piston C is turned on, the liquid surface in the glass tube is flat with the liquid surface of the water bottle, so that the pressure in the tube is equal to the atmospheric pressure, the piston C is closed, the scale number is read, and the volume of nitrous oxide is calculated according to the volume of the gas that is not absorbed, that's right.
inhalation of general anesthetic.
It was placed in a pressure-resistant cylinder and stored in a cool dark place.