Product Name: Nitrogen

Cas: 7727-37-9

Molecular Formula: N2

Molecular Weight: 28.01

Einecs Number: 231-783-9

Introduction

Nitrogen: symbol N. A colorless gas element belonging to group 15 (main group VB) of the periodic table. It occurs in the air (about 78% by volume) and is an important component of proteins and nucleic acids in living organisms. Nitrogen has 19 isotopes, two of which are stable. Stable nitrogen and its ratio to the abundance of natural nitrogen on Earth are: N-14 = 99.634%, N-15 = 0.366%. The other 17 isotopes are radioactive and are artificially produced in nuclear reactors, with half-lives ranging from a few nanoseconds to 9.965 minutes. In its natural state, nitrogen is a relatively inert diatomic molecule (N2), colorless, odorless and tasteless, but it is responsible for hundreds of active compounds. It accounts for about 78% of the air we breathe. We constantly breathe it into our lungs without irritation or feeling. Therefore, we do not really detect its presence. After liquefaction, it is still colorless and odorless, and its density is similar to that of water

Product Description

N2 is a colorless, tasteless, odorless, non-toxic gas under normal conditions, and nitrogen is generally less dense than air. Nitrogen accounts for 78.08% (volume fraction) of the total atmosphere and is one of the main components of air. Under standard atmospheric pressure, nitrogen turns into a colorless liquid when cooled to -195.8℃, and turns into a snow-like solid when cooled to -209.8℃. Nitrogen is chemically inactive and is almost completely inert gas. It can cause suffocation at high concentrations.

Physicochemical Properties

There are about 4,000 trillion tons of gases in the atmosphere, of which nitrogen makes up 78%. Nitrogen is slightly soluble in water and alcohol. It is non-flammable and is considered an asphyxiant (i.e., breathing pure nitrogen deprives the body of oxygen). Although nitrogen is considered an inert element, it forms some very reactive compounds. It is used as a diluent and controls natural combustion and respiration rates, which are faster at higher oxygen concentrations. Nitrogen is soluble in water and alcohol, but is essentially insoluble in most other liquids. It is essential to life, and its compounds are used as food or fertilizer. Nitrogen is used to make ammonia and nitric acid. Nitrogen is essentially an inert gas at ambient and moderate temperatures. Therefore, most metals can handle it easily. At elevated temperatures, nitrogen can be aggressive to metals and alloys.

Chemical properties

Colorless, odorless, tasteless, gas that can be compressed to high pressure. Soluble in water, slightly soluble in alcohol.

Uses

1. Nitrogen can be used in the chemical industry to produce synthetic ammonia, nitric acid, calcium cyanamide, cyanide, hydrogen peroxide, etc. Pure nitrogen is used as a protective gas to prevent oxidation, volatility, and flammable substances, and as a bulb filling gas. Liquid nitrogen is mainly used as a cold source for deep freezing of instruments or parts and quick freezing of food. It is also used for low-temperature micro-grinding and the electronics industry.

2. Used in metal smelting, chemical industry, mechanical processing and other industries

3. Used in fertilizers, medicine, animal husbandry, refrigeration and electronics industries, etc.

4. Used in the production of nitric acid, synthetic ammonia, calcium cyanamide, explosives, etc.

5. Used in electrical appliances, food packaging filling gas, thermal oxidation, epitaxial diffusion, chemical vapor deposition in the preparation process of semiconductor devices, and can also be used in gas chromatographs

6. Used for extraction and freezing of rare gases, deep freezing of instruments or parts, etc.

7. Can be used as an air and oxygen dispersant.

8. Nitrogen can also be used as a refrigerant, as a direct refrigerant for rapid freezing of food; packaging gas (used to replace residual air in packaging containers to extend the shelf life).

Applications

Nitrogen is often called an inert gas and is used in some inert atmospheres for metal treatments and in light bulbs to prevent arcing, but it is not chemically inert. It is an essential element for plant and animal life and is a component of many useful compounds. Nitrogen combines with many metals to form hard nitrides, which can be used as wear-resistant metals. Small amounts of nitrogen in steel inhibit grain growth at high temperatures and also increase the strength of some steels. It is also used to produce hard surfaces on steel. Nitrogen can be used to make ammonia, nitric acid, nitrates, cyanides, etc.; in the manufacture of explosives; to fill high-temperature thermometers, incandescent bulbs; to form an inert material to preserve materials, used in dry boxes or glove bags. Liquid nitrogen in food freezing processes; in laboratories as a coolant.

Production method

The air separation method uses a full low-pressure process. First, dust and mechanical impurities in the air are removed, then compressed in a compressor, carbon dioxide in the compressed air is removed, the compressed air is dried, and separated into oxygen and nitrogen through liquefaction and distillation. Nitrogen is stored in a nitrogen cabinet; liquid nitrogen is sent to a storage tank, and compressed nitrogen is filled in a nitrogen cylinder.