What is diphenyl toluene What is commonly known as 20

I suggest that you do not use benzene and xylene, just use Tianna water, banana water, and thinner. But you have to be careful, that thing is poisonous,,, of course not as highly toxic as mentioned above,,, but the way of invasion: inhalation, ingestion, and transdermal absorption.

Health hazards: high concentrations of benzene have an anesthetic effect on the central nervous system, causing acute poisoning; Long-term exposure to benzene damages the hematopoietic system and causes chronic poisoning.

Acute poisoning: mild cases include headache, dizziness, nausea, vomiting, mild excitement, staggering gait and other drunken states; In severe cases, coma, convulsions, and a drop in blood pressure may occur, resulting in respiratory and circulatory failure.

Chronic poisoning: the main manifestations are neurasthenic syndrome; Changes in the hematopoietic system: leukocytes, thrombocytopenia, aplastic anemia in severe cases; In a few cases, leukemia can develop after chronic poisoning (acute myeloid is common).

**Lesions include degreasing, dryness, chapping, and dermatitis. It can cause heavy menstrual bleeding and prolonged menstrual periods.

Never wash with benzene or xylene, as both substances are highly toxic.

Don't be so troublesome, just wipe the wind oil essence with toilet paper a few times, you can wipe it off, and wash it with water after cleaning.

It is toluene and xylene, and it is best to wash it with sodium p-toluenesulfonate.

thinner, which dissolves paint.

Dibenzene, there is this thing??

Toluene is highly toxic, and a small amount is fine. Do it yourself.

Xylene is the product of the substitution of the hydrogen atom on the benzene structure by two methyl groups, and this is the difference between them in structure.

Xylene is a Class 3 dangerous good, or a liquid with a high flash point.

According to China's "List of Hazardous Chemicals", xylene and toluene are both hazardous chemicals and toxic substances. Among them, toluene belongs to the flash point flammable liquid in Category 3, item 2, while xylene is a high flash point liquid in category 3, item 3.

Xylene needs special attention in transportation.

To engage in the transportation of toluene and xylene, it is necessary to guess the use of special transport vehicles for dangerous goods, and it is necessary to comply with the relevant laws and regulations of the country.

Common precautions for the transportation of dangerous goods

Dangerous goods transportation is a kind of special transportation, which refers to the transportation of unconventional goods by special vehicles by specially organized or technical personnel.

Generally, only after strict review by the relevant functional departments of the state, and have the corresponding facilities and equipment to ensure the safe transportation of dangerous goods, can we be qualified to transport dangerous goods.

Dangerous goods are flammable, explosive and highly corrosive goods, the transportation of dangerous goods is a huge danger, a little attention may cause material loss or personnel.

According to the two national standards of GB13690-92 "Classification and Marking of Commonly Used Hazardous Chemicals" and GB6944-86 "Classification and Name Number of Dangerous Goods", chemicals are divided into 8 categories according to their hazards

1. ** product.

2. Compressed gas and liquefied gas.

3. Flammable liquids.

4. Flammable solids, spontaneously combustible items and flammable materials that are wet and rotten in case of omen.

5. Oxidants and organic peroxides.

6. Poisonous and infectious substances.

7. Radioactive materials.

8. Corrosive products. <>

Xylene belongs to the third class of flammable liquids in dangerous goods, xylene is a colorless and transparent liquid, with a special smell of aromatic hydrocarbons; It is the product of two hydrogen substitutions by methyl groups on the benzene ring, and there are three isomers of o-, inter and p-, and in industry, xylene refers to the mixture of the above isomers.

Xylene is a colorless liquid mixed with a variety of benzene substances, which can cause intense vomiting and bloody pneumonia when ingested. The volatile vapor of xylene also has a great effect on the eyes and respiratory tract, and can anesthetize everyone's central nervous system. Moreover, xylene vapor burns when heated and fired** after being mixed with air, and xylene itself is also very flammable.

Therefore, xylene should pay special attention in the process of transportation, and those engaged in the operation of this material must apply for a hazardous chemicals business license (Class B).

Xylene vapor is flammable and flammable when heated, so when storing, the warehouse should be cool and ventilated, and it needs to be equipped with ventilation equipment, away from heat sources and fire sources.

Xylene is an important chemical raw material, which is widely used as a solvent in coatings, resins, dyes, inks and other industries; It is used in medicine, explosives, pesticides and other industries to make synthetic monomers or solvents; It can also be used as a component of high-octane gasoline and is an important raw material for organic chemicals. It can also be used to remove asphalt from car bodies. The pathology department of the hospital is mainly used for the transparency and deparaffinization of tissues and sections.

The differences between toluene and xylene are as follows:

1. Toluene. Industrial toluene is a colorless, transparent liquid with a benzene-like odor and may sometimes contain a small proportion of aliphatic hydrocarbons of the same boiling range in the same boiling range. Similar to benzene, toluene is insoluble in water and can be miscible with various organic solvents such as methanol, ethanol, chloroform, acetone, glacial acetic acid and benzene.

Toluene can soluble tung hydrolysis dry oil and other vinyl resins and alkyd resins except vinyl chloride. The addition of methanol and ethanol to toluene increases the solubility of cellulose acetate.

Because toluene volatilizes quickly (about 3 times that of xylene), it is rarely used as a solvent, and is currently mainly used as one of the components in the mixed solvent of ethylene coatings and chlorinated rubber coatings. It is used as a thinner in nitrocellulose coatings.

2. Xylene.

The xylene is a mixture of three isomers of o-, m-and paraxylene, and any of the three isomers is not suitable for use as a solvent in the paint alone.

Industrial mixed xylene is a colorless, transparent liquid with the characteristic odor of aromatic hydrocarbons, sometimes emitting a faint fluorescence. Due to the difference in **, it is divided into petroleum mixed xylene and coking xylene. The former is divided into 3° mixed xylene and 5° mixed xylene according to different distillation ranges; The latter can be divided into ° and 10° xylene, and other parameters are basically the same.

According to the ** and different processing routes, the content of the three isomers in the mixed xylene is also different, and the following table lists the composition of the petroleum mixed xylene prepared by the three routes. At the same time, mixed xylene often contains ethylbenzene, small amounts of toluene, trimethylbenzene, aliphatic hydrocarbons and sulfides.