Is phenol toxicity physical or chemical 5

It is a physical property, and the color, character, smell, toxicity, volatility, etc. of general objects are all physical properties.

Low concentrations of phenols can denature proteins, and high concentrations can precipitate proteins. It has a strong corrosive effect on the mucous membrane, and can also inhibit the central nervous system or damage liver and kidney function. Aqueous solutions are easier to absorb than pure phenols, while emulsions are more easily absorbed.

Most of the inhaled phenol remains in the lungs and is quickly excreted after cessation of contact. Most of the absorbed phenols are excreted in the urine in their original form or in combination with sulfuric acid, glucuronic acid or other acids, and some of them are oxidized to catechol and hydroquinone are excreted in the urine, making the urine brownish-black (phenol urine). Oral lethality has been reported as mixed, with LD of 2 15 g or MLD of 140 mg kg to 14 g kg.

It has been reported that the area of phenol liquid contamination ** is 25%, and the death is 10 minutes, and the blood phenol is. Clinical manifestations Acute poisoning: inhalation of high-concentration vapors can cause headache, dizziness, fatigue, blurred vision, pulmonary edema and other manifestations.

Accidental ingestion can cause burns of the digestive tract, burning pain, phenol odor of exhaled air, blood in vomit or stool, gastrointestinal perforation, shock, pulmonary edema, and liver or kidney damage.

Chemical properties. Hope.

All are toxic chemical properties.

The physical properties of phenol are heat of combustion (kj mol): , critical temperature ( ) critical pressure (mpa): etc.

1. Phenol was discovered in coal tar by the German chemist Rungef in 1834, so it is also known as carbolic acid.

2. Relative vapor density of phenol (air = 1): , refractive index, saturated vapor pressure (kpa): , heat of combustion (kj mol): , critical temperature ( ).

3. Critical pressure of phenol (mpa): logarithm of octanol water partition coefficient: ,**upper %(v v):,ignition temperature ( )715,**lower limit %(percolation v v):.

4. Solubility of phenol: dusty is miscible in ether, chloroform, glycerol, carbon sulfide, petroleum jelly, volatile oil, and strong alkali aqueous solution.

5. Phenol is soluble in organic solvents such as ethanol, glycerol, chloroform, ether at room temperature, slightly soluble in water at room temperature, and can be liquefied when mixed with about 8% water, and more than 65 can be miscible with water, almost insoluble in petroleum ether.

Chemical Properties of Phenol:

1. Phenol can absorb moisture in the air and liquefy. It has a special odor, and the extremely dilute solution has a sweet taste. Extremely corrosive. Strong chemical reaction ability. reacts with aldehydes and ketones to form phenolic resin, bisphenol A, and acetic anhydride; Salicylic acid reacts to form phenyl acetate and salicylate.

2. Phenol can be halogenated, hydrogenated, oxidized, alkylated, carboxylated, esterified, etherified and other reactions. Phenol is solid at normal temperature and does not react smoothly with sodium.

3. If the method of heating and melting phenol and then adding sodium metal is used for the experiment, the phenol is easy to be reduced, and the color of phenol changes when heated and the experimental effect is affected.

4. Some people have done experiments in teaching, the operation is simple, and satisfactory experimental results have been obtained. The principle of the experiment is that phenol is dissolved in ether, so that the reaction of phenol and sodium can be carried out smoothly.

1. Phenol is a colorless needle-like crystal with a special odor, which is toxic and is an important raw material for the production of certain resins, fungicides, preservatives and drugs (such as aspirin).

2. It can also be used for the treatment of sterilized surgical instruments and excrement, **sterilization, itching and otitis media. Melting point 43, slightly soluble in water at room temperature, soluble in organic solvents; When the temperature is higher than 65, it can be miscible with water in any proportion. Phenol is corrosive, and after contact, it will denature the local protein, and its solution can be washed with alcohol when it touches the **.

A small fraction of phenol is exposed to air and is oxidized by oxygen to quinone and has a pink color. When ferric ions turn purple, this method is usually used to test phenol.

Chemical properties. It can absorb moisture in the air and liquefy, has a special odor, and the extremely dilute solution has a sweet taste, is extremely corrosive, and has strong chemical reaction ability. Phenol is solid at normal temperature, and sodium can not react smoothly, if the method of heating and melting phenol and then adding metal sodium is used for experiments, phenol is easy to be reduced, and the color of phenol changes when heated and affects the experimental effect.

It reacts with aldehydes and ketones to form phenolic resin, bisphenol A, and acetic anhydride and salicylic acid to form phenyl acetate and salicylate. It can also carry out halogenation, hydrogenation, oxidation, alkylation, carboxylation, esterification, etherification and other reactions.

Physical; Solubility, miscible in ether, chloroform, glycerol, carbon disulfide, petrolatum, volatile oil, strong alkaline aqueous solution. Soluble in ethanol, glycerol, chloroform, ether and other organic solvents at room temperature, slightly soluble in water at room temperature, can be liquefied when mixed with about 8% water, more than 65 can be miscible with water, almost insoluble in petroleum ether.

Phenol is corrosive, slightly soluble in water at room temperature, soluble in organic solution, when the temperature is higher than 65, it can be miscible with water in any proportion. Its solution can be washed with alcohol when it is stained with **, and phenol is pink when exposed to air. Phenol, also known as carbolic acid and hydroxybenzene, is the simplest phenolic organic matter, a weak acid, a colorless crystal at room temperature, and toxic.

Phenol can be used to disinfect surgical instruments and the treatment of excrement, **sterilization, itching and otitis media. A small fraction of phenol is exposed to air and is oxidized by oxygen to quinone and has a pink color. When ferric ions turn purple, this method is usually used to test phenol.

Benzene is a colorless, sweet-smelling transparent liquid at room temperature, which is less dense than water and has a strong aromatic odor. The boiling point of benzene is, and the melting point is. Benzene is less dense than water, with a density of , but its molecular mass is heavier than water.

Benzene is insoluble in water, and the maximum amount of benzene dissolved in 1 liter of water is dissolved; But benzene is a good organic solvent with a strong ability to dissolve organic molecules and some non-polar inorganic molecules. Celebrations.

Extracted from coal tar.

The light tar produced during the coal coking process contains large amounts of benzene. This is the original method of producing benzene. The resulting coal tar and gas are passed together through a washing and absorption equipment, and the coal tar with a high boiling point is used as a washing and absorbent **Coal tar in the gas.

After distillation, crude benzene and other high boiling point fractions are obtained. Crude benzene is refined to obtain industrial-grade benzene. The purity of benzene obtained by this method is relatively low, and the environmental pollution is serious, and the reputation disturbance process is relatively backward.