Trimethylamine (Class VI Hazardous Chemicals)
The simplest tertiary amine, colorless gas at room temperature, (aqueous solution is a colorless liquid) has a fishy odor, soluble in water, ethanol, ether, flammable, toxic, relative density (water = 1) 0.66 (-5 ℃)
Mix methanol and ammonia in a certain proportion, at a certain temperature and pressure, with activated alumina as a catalyst, synthesized to one, two, three methylamine
Ethylamine (Class VI Hazardous Chemicals)
Colorless and extremely volatile liquid (or gas), with the odor of ammonia, alkaline. This product is highly toxic. Strongly irritating. Unstable to light, decompose to form hydrogen, chlorine, ammonia, methane and ethane by UV irradiation at 140~200°C. Pyrolyze at 490~555°C under low pressure to form hydrogen, chlorine, methane, etc. Melting point (℃): -80.9, boiling point (℃): 16.6, density (water = 1): 0.70, soluble in water, ethanol, ether and so on.
Monoethylamine (Class VIII Hazardous Chemicals)
Colorless and transparent extremely volatile liquid, with the odor of ammonia, alkaline. Melting point -81℃, boiling point 16.6℃, density 0.6828 (20/20℃.). Miscible with water, ethanol, ether.
Diethylamine (eight kinds of dangerous chemicals)
Colorless liquid, ammonia odor, strong alkaline, corrosive, volatile, flammable. Can be mixed with water or ethanol at will. Strong irritation, melting point (℃): -50, boiling point (℃): 55, density (water = 1): 0.71.
Ethylenediamine (Class VIII Hazardous Chemicals)
Colorless or slightly yellow viscous liquid, with an odor similar to ammonia. Melting point (℃): 8.5, boiling point (℃): 117.2, density (water = 1): 0.90, soluble in water, alcohol, insoluble in benzene, slightly soluble in ether.
Triethylamine (Class VIII Hazardous Chemicals)
Colorless to light yellow transparent liquid, with strong ammonia odor, slightly fuming in the air. -115 °C, Boiling Point:89.5 °C, Relative Density(Water=1):0.70, Relative Density(Air=1):3.48, Slightly soluble in water, soluble in ethanol, ether. Aqueous solution is alkaline. Flammable, its vapor can form explosive mixtures with air.
Cyclohexylamine (Class VIII Hazardous Chemicals)
Colorless to yellow liquid, strongly alkaline, with strong ammonia odor. Melting point (℃): -17.7, boiling point (℃): 134.5, density (water = 1): 0.86. Soluble in water, miscible in most organic solvents.
Sulfuric acid (eight types of hazardous chemicals)
(Chemical formula: H₂SO₄), sulfur’s most important oxygen-containing acid. Anhydrous sulfuric acid is a colorless oily liquid that crystallizes at 10.36°C. Usually used are aqueous solutions of it in various concentrations, obtained by the tower method and the contact method. The former results in crude dilute sulfuric acid, the mass fraction is generally about 75%; the latter can be obtained as pure concentrated sulfuric acid with a mass fraction of 98.3%, a boiling point of 338 ° C, relative density 1.84.
Sulfuric acid is one of the most active binary inorganic strong acid, can react with many metals. High concentration of sulfuric acid has strong water absorption, can be used as a dehydrating agent, carbonization of wood, paper, cotton and linen fabrics and biological flesh and other carbohydrate-containing substances. When mixed with water, it also releases a lot of heat energy. It has strong corrosive and oxidizing properties, so it should be used with caution. It is an important industrial raw material, which can be used in the manufacture of fertilizers, drugs, explosives, pigments, detergents, storage batteries, etc. It is also widely used in the purification of petroleum, metal smelting and dyestuffs and other industries. It is often used as chemical reagent, and can be used as dehydrating agent and sulfonation agent in organic synthesis.
Hydrochloric Acid (Class VIII Hazardous Chemicals)
Hydrochloric acid is the common name for the aqueous solution of hydrogen chloride (HCl) gas, which is a colorless and transparent one element strong acid. Hydrochloric acid has a strong volatility, so after opening the container containing concentrated hydrochloric acid, you can see a white mist above it, which is actually a small droplet of hydrochloric acid produced by combining hydrogen chloride volatilization with water vapor in the air.
Hydrochloric acid (Hydrochloric acid) molecular formula HCl, relative molecular mass of 36.46. Hydrochloric acid for different concentrations of hydrogen chloride aqueous solution, transparent colorless or yellow, with an irritating odor and strong corrosive. It is soluble in water, ethanol, ether and oil. Concentrated hydrochloric acid is an aqueous solution containing 38% hydrogen chloride, relative density 1.19, melting point -112 ℃ boiling point -83.7 ℃. 3.6% hydrochloric acid, pH 0.1.
Nitric acid (eight types of hazardous chemicals)
A strong oxidizing, corrosive strong acid. Nitric acid is soluble in water, and its solution is colorless and transparent at room temperature. Its different concentrations of aqueous solution of different properties, commercially available concentrated nitric acid for the constant boiling mixture, the mass fraction of 69.2% (about 16mol / L), the mass fraction is large enough (commercially available concentration of 95% or more), known as fuming nitric acid. Nitric acid is easily decomposed in the presence of light, should be stored in brown bottles in a dark place protected from light, can also be stored in frosted outer plastic bottles (less recommended), is strictly prohibited from contact with reducing agents. Nitric acid is mainly produced by ammonia oxidation in industry for the manufacture of fertilizers, explosives, nitrates, etc. In organic chemistry, the mixture of concentrated nitric acid and concentrated sulfuric acid is an important nitrification reagent. Chemical formula is HNO3, concentrated nitric acid and concentrated hydrochloric acid according to the volume ratio of 1:3 mixture can be made of strong corrosive aqua regia.
n-Butylamine (Class VI Hazardous Chemicals)
Colorless, transparent, volatile liquid with irritating ammonia odor. Strong reaction with oxidizer. Easy to explode, corrosive. Melting point -50 ℃ Boiling point: 77 ℃, density (water = 1) 0.74 ~ 0.76 miscible with water, miscible in alcohol, ether.
Dimethylaniline (Class VI Hazardous Chemicals)
Colorless to light yellow oily liquid, with irritating odor, easy to oxidize in the air or under the sunlight and darken with luster. Relative density (20℃/4℃) 0.9555, melting point 2.0℃, boiling point 193℃, soluble in ethanol, ether, chloroform, benzene and other organic solvents. Can dissolve a variety of organic compounds. Slightly soluble in water.
