Aniline (Class VI Hazardous Chemicals)

Aniline (Class VI Hazardous Chemicals)
Colorless oily liquid, will gradually change to dark brown in air and brownish black if left for a long time. Unpleasant odor (toxic). Slightly soluble in water, soluble in ethanol, ether, benzene. Melting point: -6.2℃, boiling point: 184.4℃. Density: 1.0217.
Ethylenediamine (Class VI Hazardous Chemicals)
Colorless clarified viscous liquid (yellow when there are impurities), with ammonia odor, strongly alkaline, can be volatile with water vapor. Can absorb moisture and carbon dioxide in the air to generate non-volatile carbonate (therefore should be avoided for a long time in the air, such as the transportation process is not closed tightly can make the product deterioration, corrosive corrosion of copper and its alloys, strong irritation, can lead to human burns). Reacts violently with acetic acid, acetic anhydride, carbon disulfide, chloroiodic acid, hydrochloric acid, fuming sulfuric acid, silver peroxide. Easily soluble in water, generate hydrated ethylenediamine, soluble in ethanol and methanol, slightly soluble in ether, insoluble in benzene

Propylene (Class II Hazardous Chemicals)
Propylene (propylene, CH2=CHCH3) is a colorless, slightly sweet gas at room temperature. Molecular weight 42.08, density 0.5139g/cm3(20/4℃), freezing point -185.3℃, boiling point -47.4℃. It is slightly anesthetic, all decomposed at 815℃, 101.325kpa. Flammable, explosion limit is 2%~11%. Insoluble in water, soluble in organic solvents, is a kind of low toxicity class substances. Propylene is the basic raw material of three major synthetic materials, mainly used in the production of polypropylene, acrylonitrile, isopropyl alcohol, acetone and propylene oxide. It is a simple asphyxiant and mild anesthetic. Acute poisoning: human inhalation of propylene can cause loss of consciousness, when the concentration of 15%, it takes 30 minutes; 24%, it takes 3 minutes; 35% to 40%, it takes 20 seconds; more than 40%, it takes only 6 seconds and causes vomiting. Chronic effects: Long-term exposure can cause dizziness, fatigue, general malaise, and lack of concentration. Individuals experience disturbances in gastrointestinal function. Hazardous to the environment, can cause pollution to water, soil and atmosphere. This product is flammable.
Methylamine (Class II Hazardous Chemicals)
Methylamine is also known as monomethylamine; aminomethane; methane amine; amine methane (cylinders) are colorless liquefied gas with a special odor. (Liquids are generally 40% aqueous solutions)
Easily soluble in water, soluble in ethanol, ether, etc.
Methylamine aqueous solution: a methylamine aqueous solution is a colorless transparent liquid with the odor of ammonia; relative density (-11 ℃) 0.699, melting point -93.5 ℃, boiling point -6.3 ℃; soluble in water, soluble in ethanol, ethyl ether; easily combustible, and air to form explosive mixtures; have a weak alkaline base, with the generation of inorganic acid salts that are easily soluble in water.

Liquid Chlorine (Class II Hazardous Chemicals) (Class VI Hazardous Chemicals)
Chemical name liquid chlorine, yellow-green liquid, boiling point -34.6 ℃, melting point -103 ℃, at atmospheric pressure that is vaporized into a gas, inhalation of the body can be seriously poisoned, there is a strong irritation and corrosive, and other flammable gases mixed with the combustion and explosion in the daylight, chlorine is a very active substance, and most elements (or compounds) to react. Liquid chlorine is yellowish green oily liquid, toxic, specific gravity is 1.4256 at 15℃, boiling point is -34.6℃ and freezing point is -101.5℃ under standard condition. It is strongly corrosive to steel in the presence of moisture. Liquid chlorine is a basic chemical raw material, can be used in metallurgy, textile, paper and other industries, and is the raw material for synthesizing hydrochloric acid, PVC, plastics, pesticides. It is packed in high-pressure cylinders with net weight of 500kg, 1000kg; tanker trucks with net weight of about 25 tons/tank. Store in cool, dry and ventilated place, fireproof, sunproof and heatproof. Liquid chlorine will not burn, but can be combustible. Most of the general combustible materials can be burned in chlorine gas, general flammable gases or vapors can also form explosive mixtures with chlorine gas. Chlorine can react violently with many chemicals such as acetylene, turpentine, ether, ammonia, fuel gas, hydrocarbons, hydrogen, metal powder, etc. to explode or generate explosive substances. It is corrosive to almost all metals and non-metals.
Liquefied petroleum gas (Class II hazardous chemicals)
Colorless gas or yellowish brown oily liquid with special odor. It is a by-product of the catalytic cracking and thermal cracking of crude oil in oil refineries. The main components of catalytic cracking gas are as follows (%): hydrogen 5-6, methane 10, ethane 3-5, ethylene 3, propane 16-20, propylene 6-11, butane 42-46, butene 5-6, containing more than 5 carbon atoms of hydrocarbons 5-12. It is used for the production of synthetic plastics, synthetic rubber, synthetic fibers and the production of pharmaceuticals, explosives, dyes and other products. With liquefied petroleum gas as fuel, due to its high calorific value, no soot, no carbon residue, easy to operate and use, has been widely into the field of people’s lives. In addition.

Liquefied petroleum gas (Class II hazardous chemicals)
Colorless gas or yellowish brown oily liquid with special odor. It is a by-product of the catalytic cracking and thermal cracking of crude oil in oil refineries. The main components of catalytic cracking gas are as follows (%): hydrogen 5-6, methane 10, ethane 3-5, ethylene 3, propane 16-20, propylene 6-11, butane 42-46, butene 5-6, containing more than 5 carbon atoms of hydrocarbons 5-12. It is used for the production of synthetic plastics, synthetic rubber, synthetic fibers and the production of pharmaceuticals, explosives, dyes and other products. With liquefied petroleum gas as fuel, due to its high calorific value, no soot, no carbon residue, easy to operate and use, has been widely into the field of people’s lives. In addition, LPG is also used for cutting metals, for baking of agricultural products and for roasting in industrial kilns. The main components of LPG are propane and butane.
Propane has a boiling point of -42 degrees Celsius, making it a particularly useful lightweight fuel. This means that even at very low temperatures, propane vaporizes immediately after it is released from a high-pressure container. It is therefore a clean fuel and does not require a lot of equipment to vaporize it and mix it with air. A simple nozzle is all that is needed.
Butane has a boiling point of about -0.6 degrees Celsius and does not vaporize at very low temperatures. Therefore, butane has limited use and needs to be mixed with propane rather than used alone.

Natural Gas (Class II Hazardous Chemical)
Natural gas is a mixture of hydrocarbons in underground rock reservoirs, with a specific gravity of about 0.65, lighter than air, colorless, odorless, and non-toxic.
Natural gas is mainly composed of alkanes, of which methane accounts for the vast majority, and a small amount of ethane, propane and butane, in addition to hydrogen sulfide, carbon dioxide, nitrogen and water, and a small amount of carbon monoxide and trace amounts of rare gases, such as helium and argon. Before the natural gas is delivered to the end user, in order to help leak detection, mercaptan, tetrahydrothiophene, etc. are also used to add odor to the natural gas. The main use of natural gas is as a fuel for the manufacture of carbon black, chemicals and liquefied petroleum gas (LPG). Propane and butane produced from natural gas are important raw materials for modern industry. Natural gas consists mainly of a mixture of gaseous low molecular hydrocarbons and non-hydrocarbon gases.
Dimethylamine (aqueous solution) (Class VI Hazardous Chemicals)
Colorless flammable gas or liquid, with a strong unpleasant ammonia odor in high concentration or compressed liquefaction, and the bad odor of fish oil in very low concentration. Soluble in water, soluble in ethanol and ether. Melting point: -92.2℃, Boiling point: 6.9℃, Density (water=1): 0.68.