What are the hazards of tar in cigarettes and what is the tar content in cigarettes?

The tar in cigarettes is the main substance that endangers human health and causes human cancer.

The carcinogens and carcinogens of smoke tar are polycyclic aromatic hydrocarbons (PAHs) and porphyry, which can be deposited in the lungs and may become carcinogenic after years of accumulation. The smoke produced by cigarette ignition, especially the tar it contains, is a carcinogen – that is, it can cause cancer in the tissues it touches, so it can develop cancer anywhere in the smoker's airway, including the mouth and throat.

Tar will cover your lungs, and smoking for a long time, covering faster than your metabolism, will cause lung cancer. So it's better to smoke less.

1.to the teeth. Damage to the oral mucosa, causing the formation of smoke spots in the lungs.

2.The concentration of carbon monoxide is increased by 3 to 5 times, and the dust particles produced become the first to spread diseases by the bacteria that are prone to it.

3.It is difficult to eliminate after inhalation, accumulating in the kidneys, liver, lungs, etc"Bone pain"and other symptoms.

4.It can cause vasospasm, vascular endothelial cell damage, and make ** dry.

5.Poisoning of the optic nerve and loss of vision.

Smoke tar refers to a layer of brown greasy matter accumulated in the cigarette holder used by smokers, and the incomplete combustion of tar can produce many carcinogens. Tobacco tar content refers to the content of tar in cigarettes, expressed in milligrams, is one of the important indicators used to evaluate the safety of cigarettes, and it is generally recognized internationally that the tar content is less than 15 milligrams for safe cigarettes.

Tobacco tar content refers to the amount of tar in cigarettes, expressed in milligrams. Tar is the product of thermal decomposition of cigarettes in the process of inoction, which is a complex compound composed of a variety of hydrocarbons and hydrocarbon oxides, sulfides and nitrides, etc., which together with nicotine and water constitute the total inhalable particulate phase in the flue gas, that is to say, in addition to nicotine and water, the rest of the components in the flue gas are collectively referred to as tar.

It is generally believed that the harmful components in cigarette smoke are mainly concentrated in tar. According to the research of Dr. Zuo Tianjue, a Chinese-American tobacco expert, the substances in smoke tar are harmless, only harmful, which are cancer-inducing substances and cancer-promoting substances.

Therefore, the tar contained in cigarettes has become a key harmful substance of general concern, and reducing the tar content in cigarette smoke has become one of the internationally recognized tobacco control measures.

Tobacco itself contains only trace amounts of polycyclic aromatic hydrocarbons, whereas the tar in tobacco produces large amounts of polycyclic aromatic hydrocarbons during smoking. Its generation, enrichment, value-added and the local ignition temperature of the cigarette is closely related, when smoking, the local temperature of the paper cigarette can reach 600-900, at the time of smoking, the temperature of the red-hot part can reach 980-1050, and in the interval between two smoking, the temperature drops by about 100-150.

In the process of smoking, except for the outer part of the cigarette, it is basically burned under the condition of insufficient oxygen supply, which not only produces a large amount of carbon monoxide, but also increases the types of polycyclic aromatic hydrocarbons with the increase of coking temperature, such as benzene, tu, pyrene, phenol and other carcinogens, which are mostly generated at 700-900, while carcinogenic substances such as phenol and fumaric acid are generated at 500-700 low temperature. Therefore, the content of polycyclic aromatic hydrocarbons in tobacco tar is much higher than that of tobacco itself, both in type and quantity.

In a general sense, decoking refers to reducing the content of tar in cigarette smoke to improve the safety of smoking. Since the 70s of the 20th century, more and more countries have adopted strict laws regulating the amount of tar and nicotine in cigarettes.

Content division. According to the international general regulations, cigarette tar content less than 14 mg is low tar content, 15 to 21 mg count is medium tar content, and more than 22 mg count is high tar content.

The national standards implemented in China are: tar content less than or equal to 10 mg is low tar content, 11 to 15 mg is medium tar content, and more than 15 mg is high tar content.

The tar tolerance range is less than or equal to milligrams for cigarettes less than or equal to 4 mg, the tar tolerance range is less than or equal to milligrams for cigarettes from 5 to 9 mg, and the tar tolerance range is less than or equal to milligrams for cigarettes greater than or equal to 11 mg.

Tar content refers to the amount of tar in cigarettes, expressed in milligrams. "Coke reduction" is the world trend Industry insiders pointed out that low tar hybrid is the world trend of cigarette products, and China's cigarettes are precisely high tar content, flue-cured cigarettes account for a large proportion, which is a huge obstacle for domestic cigarettes to participate in international competition. At present, foreign cigarettes have an absolute advantage in the market competition of mixed cigarettes.

If China does not make substantial progress in the research and development of low-tar mixed cigarettes, then under the dual pressure of the WTO and the WHO, China has to give up most of the domestic market to foreign cigarettes. Therefore, improving the scientific and technological content of cigarette products, reducing the harmful components of tobacco, and reducing coke and harm have become an inevitable choice and top priority for Chinese tobacco companies to resist the entry of multinational tobacco giants. Since the 70s of the 20th century, more and more countries have adopted stricter laws on the permissible amount of tar and nicotine.

In the United States, the average amount of tar in cigarettes fell to 12.5 mg in 1990; In the European Union, the maximum allowable tar allowance was reduced to 10 mg in 2004. In the Japanese market, the average amount of tar in cigarettes has dropped to about 8 milligrams. On November 10 last year, China, the world's largest tobacco consumer market and the world's largest tobacco producer, joined the Framework Convention on Tobacco Control (FCTC) and committed to increasing the average tar content of cigarettes produced in China by 2005.

Tar content refers to the amount of tar in cigarettes, expressed in milligrams. Tar is a product of thermal decomposition of cigarettes during the inflection process, and is a complex compound composed of a variety of hydrocarbons and hydrocarbon oxides, sulfides and nitrides.

Tar content refers to the amount of tar in cigarettes, expressed in milligrams.

The remaining part of the cigarette smoke particles except for water and nicotine is called tar. Tar is a complex compound composed of a variety of hydrocarbons and hydrocarbon oxides, sulfides and nitrides produced by incomplete combustion of organic substances in cigarette tobacco under anoxic conditions. It is generally believed that the harmful components in cigarette smoke are mainly concentrated in tar.

What is the tar content in cigarettes? It is necessary to return twice the amount of tar and nicotine.

Cigarette tar refers to a layer of brown greasy matter accumulated in the cigarette holder used by smokers, commonly known as cigarette oil. It is the product of incomplete combustion of organic matter under anoxic conditions. It is an extremely complex mixture of many hydrocarbons and hydrocarbon oxides, sulfides and nitrides, including benzopyrene, cadmium, arsenic, amines, nitrosamines and radioactive isotopes, etc., a variety of carcinogens and phenols, fumaric acid and other carcinogenic substances The characteristics of the action of carcinogenic substances, although the amount is very small, but it has a regular, repeated and long-term accumulation effect.

Ingredients: Tobacco itself contains only trace amounts of polycyclic aromatic hydrocarbons, while the vast majority of the polycyclic aromatic hydrocarbons in tar are produced during smoking. Its generation, enrichment, value-added and the local ignition temperature of the cigarette is closely related, when smoking, the local temperature of the paper cigarette can reach 600-900, at the time of smoking, the temperature of the red-hot part can reach 980-1050, and in the interval between two smoking, the temperature drops by about 100-150.

In the process of smoking, except for the outer part of the cigarette, it is basically burned under the condition of insufficient oxygen supply, which not only produces a large amount of carbon monoxide, but also increases the types of polycyclic aromatic hydrocarbons with the increase of coking temperature, such as benzene, tu, pyrene, phenol and other carcinogens, which are mostly generated at 700-900, while carcinogenic substances such as phenol and fumaric acid are generated at 500-700 low temperature. Therefore, the content of polycyclic aromatic hydrocarbons in tobacco tar is much higher than that of tobacco itself, both in variety and quantity.

Amount of cigarette generated: The cigarette tar generated during smoking is about 1 6 of the weight of the original tobacco, and the yield of cigarette tar has a certain relationship with the frequency of smoking. The more times you smoke per unit of time, the more tar is generated.

3 puffs of cigarettes per minute produce almost 1 times more tar than 1 puff of cigarettes per minute. The amount of tar produced is also related to the length of the cigarette, which is conceivable, because the smoke tar smoke generated at the place where the tobacco is ignited is adsorbed by the tobacco when it passes through the unburned part of the cigarette. As the ignition gets closer to the end, almost most of the tar produced enters the smoker's respiratory tract, and the ratio of the amount of tar produced by the first half of a cigarette to the second half of a cigarette is about 1, and the amount of tar produced by cigars, pipe cigarettes and hookahs is less than that of paper cigarettes.

The amount of smoke tar produced during smoking enters the smoker's respiratory tract with the smoke flow, and the amount absorbed by the respiratory tract is closely related to smoking habits. In a single deep smoking (inhalation), about 90% or more of the aerosol particles are carried to the lungs; For example, during 5 seconds of breath-holding after smoking, 82% of the particles can be trapped in the lungs; Hold your breath for 30 seconds, and the retention rate can be as high as 93%.

Hazards: According to scientific analysis, cigarette smoke contains more than 30 kinds of direct carcinogenic chemicals, of which the content of coal tar is the highest, and each cigarette contains about 25mg (labeled content: medium).

Coal tar is produced after the incomplete combustion of sugars in tobacco leaves, which is both a cause of cancer and a carrier of other compounds. These compounds include triphenylpropion, carbon monoxide, various aromatic compounds, and of course, nicotine, which everyone knows.

Hello, what does tar look like for cigarettes? After magnifying 400 times with a microscope, I saw clearly.

Tar is produced by the incomplete combustion of organic substances in cigarettes under anoxic conditions, and tar is a complex mixture of a variety of hydrocarbons and hydrocarbon oxides, sulfides and nitrides. The substances in flue gas tar are harmful, are carcinogenic initiators, and are synergistic agents of cancer. Tar in smoke is considered to be the most important hazard, which is why cigarette packs are labelled with a tar content (high, medium, low).

The content of polycyclic aromatic hydrocarbons in tar is the largest, and all have strong carcinogenic effects, such as benzostilbene, diphenyl prix, diphenyl onion, after these substances enter the human body, they can induce aromatic hydroxylase in human tissues, which can metabolize polycyclic aromatic hydrocarbons into carcinogens that can covalently bind to DNA molecules.

The 10 cigarettes with the lowest tar content are: Yellow Crane Tower, Changbai Mountain, Yellow Crane Tower (Happy Encounter), Yellow Crane Tower, Nanjing, Changbai Mountain, Guiyan, Jiaozi, Diamond and Cordyceps sinensis.

1. Yellow Crane Tower (Sibo).

Also known as hard Sibo, it is a cigarette under the Yellow Crane Tower brand, the tar content is as low as milligrams, the cigarette belongs to the flue-cured tobacco type cigarette, the carbon monoxide amount is, the cigarette is 84mm long, the color of the packaging box is white, and the domestic cigarette is sold domestically.

2. Changbai Mountain (alpine flowing water).

It is a flue-cured tobacco type low-hazard, low-tar cigarette product, with a tar content of 1mg, a smoke nicotine content, a carbon monoxide content of 3mg, a cigarette length of 84mm, a filter length of 30mm, and a carbide color in the packaging box.

3. Yellow Crane Tower (Happy Encounter: Golden Rose).

It is a flue-cured cigarette with a red background and gold thread on a red background, and a golden rose pattern with a strong sense of three-dimensionality in the garden circle. The amount of tar, nicotine and carbon monoxide of the cigarette is 28mg, and the cigarette length is 84mm, which is a domestic cigarette.

4. Yellow Crane Tower (for whom: big color green).

It is a flue-cured cigarette under the Yellow Crane Tower brand, with a tar content of 3mg, a smoke nicotine content, and a carbon monoxide content of 3mg, and the packaging color is green, which is a domestic tobacco.

5. Nanjing (Mengdu Zunxi).

It is a niche thin mixed cigarette with a tar amount of 3mg, which is suitable for people who like light. The amount of carbon monoxide in the cigarette is 2mg, the amount of nicotine in the smoke is 97mm, and the filter is 25mm long.

The main culprit of cigarette harm is not the tar content, nor can "low-tar" cigarettes and "light-flavored cigarettes" that lengthen the filter and reduce the diameter of the cigarette. Low tar does not equal low hazard.

In order to retain smokers, the tobacco industry adds additional flavors, additives or herbs to cigarettes, but to date, there is no evidence that these additives are legal and safe.

All tobacco products include:"Low tar"Cigarettes are deadly, and the only effective way for smokers to reduce their risk of tobacco-related diseases is to quit. Don't be fooled by gimmicks like "harm reduction and coke reduction".

Tobacco smoke contains tobacco tar, which enters the human body, which will reduce the purification effect of the respiratory tract, making the respiratory tract vulnerable to the invasion of germs and suffering from tracheitis, bronchitis and other diseases After the harmful substances reach the lungs, they can also induce lung diseases.

The smoke released when tobacco is burned contains more than 3,800 known chemicals, most of which are harmful to the human body, including carbon monoxide, nicotine and other alkaloids, amines, nitriles, drunken, phenols, alkanes, aldehydes, nitrogen oxides, polycyclic aloe aromatic hydrocarbons, heterocyclic compounds, hydroxyl compounds, heavy metal elements, organic pesticides, etc., a wide range, they have a variety of biological effects, causing various harms to the human body.