Is BTC solid phosgene toxic

1.

1. BTC: chemical vocabulary

BTC is the abbreviation of (Trichloromethyl) carbonate. It is the abbreviation of a chemical substance, mainly composed of carbon, chlorine and oxygen. The chemical formula is c3cl6o3, which can be used as the substitute proct of highly toxic phosgene and diphosgene in the synthesis

BTC: enterprise abbreviation

BTC refers to BTC Yingqun enterprise from Taiwan, China, which is a large-scale high-tech enterprise developing and procing keyboard, mouse and recorder. BTC is famous for procing high-quality computer peripherals. BTC is the OEM keyboard and add-on card proced by famous brand EMPREX, ranking first in Taiwan, especially the third in the world

BTC: the concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was formally born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system

BTC: engineering material

BTC (buttress thread coupling), full name of partial trapezoidal thread coupling, is an API standard thread connection type, which is commonly used in the connection of petrochemical pipes or tools, such as floating collar, guide shoe and pipe shoe used in cementing operation

5, BTC: e-commerce mode

BTC (business to customer) e-commerce is one of the categories of e-commerce by trading partners, that is, e-commerce of commercial institutions to consumers. This form of e-commerce is generally based on the network retail instry, mainly with the help of the Internet to carry out online sales activities. BTC is also known as B2C, B2C mode is the earliest e-commerce mode in China

2. As a virtual digital currency in the form of P2P, bitcoin is very popular in recent years, and many people will dig bitcoin. So, what's the use of bitcoin
bitcoin is generated by a large number of calculations based on a specific algorithm. Its essence is the special solution generated by a bunch of complex algorithms, and the process of digging bitcoin is to continuously seek the special solution of the equations through a huge amount of calculation. The equations are designed to have only 21 million specific solutions, so the upper limit of bitcoin is only 21 million
so if you want to dig bitcoin, you can use the computer to dig it. You can download the special bitcoin computing tool to do the operation to dig bitcoin
of course, the more professional the equipment is, the greater the probability of being able to dig. Therefore, we will carefully select the right mining machine and pool before digging bitcoin. For example, the BTC guild mine in foreign countries is very famous. As for the mining machine, it is a computer used to earn bitcoin, but the computer is equipped with professional mining chips. After all, bitcoin is a hot card. The price of a miner ranges from two or three hundred yuan to 200000 yuan.

3. Based on the concept of "decentralization", the price of bitcoin has increased millions of times in the 11 years since its birth. In October 2009, the initial price of bitcoin was about US $0.00076/coin; On December 17, 2017, bitcoin reached the highest price in history, with a single bitcoin as high as $19142
the real price start is in October 2010. Before that, you can buy 10W pieces for 1W yuan. But this is because no one bought it, resulting in extremely low prices. If someone wants to buy 10W, the price will be higher than 1W.

4. What is bitcoin to eat?

5. I've played too. Don't play any more. It's just deceiving. When you asked for five yuan, he said that you didn't ask until level 40. When you get to level 40, it's a lie to say how many videos you need to watch.

6. Solid phosgene, also known as triphosgene, chemical name: bis (Trichloromethyl) carbonate, colorless crystalline powder solid, with phosgene like odor, toxic, decomposes when meeting water or alkali. It is used to synthesize medicine, pesticide and polyurethane. It is formed by the reaction of dimethyl carbonate and chlorine.

8. It's true. You can check KCN on the Internet. 0.03g is enough. I want to show you the knowledge of poisons.

be psychologically prepared.

1. Potassium cyanide is yellow crystal, extremely toxic and soluble in water. The properties are similar to halogen
adding soluble copper salt (such as copper sulfate) into the solution will release the colorless gas cyanogen, which has a pungent smell
gold and silver can be extracted from metallurgical instry
potassium cyanide has great pollution to the environment. The main pollutants are electroplating, coking and so on. It has a great impact on human beings, livestock and sex

, which can rece agricultural proction
acute poisoning caused by potassium cyanide, severe cases immediately coma, stop breathing within 2-3 minutes; The milder patients had fainting, headache, vomiting, then palpitation, dyspnea, convulsion, coma, and finally stopped breathing
first aid should be given by inhalation of amyl nitrite, intravenous injection of sodium sulfite and sodium thiosulfate
in instrial proction, potassium cyanide needs to be proced in closed chamber
name of substance: potassium cyanide
chemical formula: KCN
hazard classification: toxic substance
Color: Yellow
character: powder or crystalline solid
odor: light almond flavor
melting point: 634 ℃
solubility in water: 71.6% (weight percentage,
corrosivity: aqueous solution will corrode metal or alloy
reactivity and incompatibility: react with strong oxidant, acid, acid salt, carbon dioxide or water to proce hydrogen cyanide
LD50 of animal: 5 mg / kg (rat, swallow)
antidote: sodium nitrite injection; Sodium thiosulfate; Other words:
colorless or white particles, relative density 1.52, melting point 634.5, highly toxic

hygroscopic, easy to deliquescence, base
absorbs CO2, H2O proces bitter almond flavor, HCN with acid
KSCN can be obtained by CO heating with s

2. Sodium nitrite is colorless or light yellow crystal with salty taste, which is a kind of instrial salt. Toxic, carcinogenic
(NO2) - n is + 3 valence, so it has both oxidation and rection
in acidic medium: HNO2 / no = 0.99 V, it has strong oxidation ability
(NO2) - + 2I - + 4H + = = 2No + I2 + 2H2O
because there is no + in the acid, it is easy to get electrons to form no, so it is easy to oxidize I -. This is the difference between nitrite and dilute nitric acid. The reason why I - can not be oxidized in the acidic solution of nitrate is e to the above kinetics. When it meets with strong oxidant, it also has recibility
5 (NO2) - + 2 (MnO4) - + 6h + = = = = 5 (NO3) - + (MN) 2 + + 3H2O
it is easy to disproportionate without oxidant and rectant

sodium nitrite is also used as a colorant in meat procts. However, e to its carcinogenicity, it is not allowed to exceed the standard

pharmacology: it can change hemoglobin into methemoglobin, and the detoxification process of cyanide is related to methylene blue, but the effect is stronger than methylene blue. It is suitable for the rescue of cyanide poisoning

sodium nitrite is an important azo reagent. Its azo reaction with aromatic amines is one of the most commonly used reactions in the dye instry.

sodium nitrite belongs to class 6 dangerous goods. It is a toxic substance. It can also be used as mordant, bleaching agent, metal heat treatment agent, corrosion inhibitor for electroplating and potassium nitrite, Azo dyes have strong oxidation and weak rection under acidic conditions

what method can be used to detect it? It's better to make it more convenient and use it at home< In fact, there are some differences in physical properties between sodium nitrite and salt: sodium nitrite is a white and slightly yellowish orthorhombic crystal, while salt is a white cubic crystal; The melting point of sodium nitrite is 271 ℃, which is easy to melt when heated. The melting point of salt is 801 ℃, which is difficult to melt when heated; Although they are all soluble in water, the solubility of sodium nitrite is greatly affected by temperature, and the dissolution rate in hot water is obviously faster and the solubility is increased, while the influence of temperature on salt is very small
2. Sodium nitrite is a strong alkali and weak acid salt, which can be detected by pH test paper
3. Silver nitrate can also be added. Take a little sample and dissolve it in distilled water. Add a few drops of 0.1M silver nitrate (AgNO3) solution. If there is light yellow precipitation and the precipitation is dissolved in dilute nitric acid, it is sodium nitrite; If there is white precipitate, and the white precipitate is insoluble in dilute nitric acid, it is salt< Please ask whether the nature of sodium nitrite is toxic or carcinogenic. After eating for 10 minutes, poisoning symptoms will appear: vomiting, abdominal pain, cyanosis, dyspnea, even convulsion, coma, even life-threatening. Once the above symptoms are found, they should be sent to the hospital for rescue in time
sodium nitrite is not only toxic, but also can synthesize nitrosamine with secondary amine in human body. It has strong carcinogenic effect and can ince tumors of various organs, especially esophageal cancer and lung cancer. Therefore, do not eat sodium nitrite by mistake< Like pickled food, it generally contains sodium nitrite, such as pickles, sausages, bacon, pickles, etc.
sodium nitrite reacts with ammonium salt to proce nitrogen, which is a way to proce N2 in the laboratory
3. Methanol
instrial methanol is a colorless, transparent, volatile, flammable and toxic gas at room temperature. The boiling point was 64.51 ℃, and the relative density (20 ℃ / 4 ℃) was 0.7913. The chemical properties of instrial methanol are relatively active, which can take place oxidation, esterification, carbonylation and other chemical reactions. Methanol is not acidic. Although its molecular composition has hydroxyl groups which can be used as basic characteristics, it is not alkaline. It is neutral to phenolphthalein and litmus

one of methanol

methanol is a colorless and combustible liquid, which has a smell similar to alcohol. Its boiling point is 65 ℃, and it can be miscible with water in any ratio. The purity of methanol fractionated from methanol aqueous solution can reach 99%. If the resial water is to be removed, an appropriate amount of magnesium can be added. Magnesium reacts with methanol to form magnesium methoxide [(CH3O) 2mg], which reacts with water to form magnesium hydroxide and methanol. Absolute methanol is obtained by distillation

methanol is poisonous. If you drink 10ml of it, you will lose your eyesight. If you drink more, you will be poisoned to death. Adding methanol to alcohol is called denatured alcohol. Drinking this kind of alcohol can cause blindness

methanol was first proced by dry distillation of wood, so methanol is also called Xylin, and this method was graally stopped after 1920. In modern times, methanol was mainly made from carbon monoxide and hydrogen (commonly known as syngas)

methanol is an excellent organic solvent or a raw material for manufacturing formaldehyde. Methanol can be blended into gasoline or diesel as internal combustion engine fuel. Since syngas is prepared from coke (the proct of coal retorting), using methanol as fuel can save petroleum resources, and the procts of methanol combustion do not pollute the environment.)

methanol 2

methanol is also known as xylol (because it was first obtained from wood retorting). Colorless, flammable, pungent liquid, melting point is - 97.56 ℃, boiling point is 64.7 ℃, relative density is 0.7913, soluble in water and most organic solvents. Its toxicity is very strong, can damage the optic nerve, drink can make the eye blind, even death< At present, methanol is prepared from carbon monoxide and hydrogen under pressure and heating in the presence of catalyst in China's instry:

if the conditions are strictly controlled, the yield can reach 100% and the purity can reach 99%< Methanol can also be prepared by mixing methane with oxygen (9 ∶ 1, V / V) under heating and pressure through copper tube:

methanol has the general properties of aliphatic primary alcohol, and the three hydrogen atoms on the carbon atoms with hydroxyl groups can be oxidized to graally form formaldehyde, formic acid and finally carbon dioxide. Therefore, an important use of methanol is to synthesize formaldehyde. Methanol can also be easily converted into important organic synthesis intermediates such as methyl carboxylate, chloroform and methylamine. Methanol is also an important organic solvent, extractant and alcohol denaturant< Nitrous oxide is a colorless and sweet gas, also known as nitrous oxide. It is an oxidant, chemical formula N2O. It can support combustion under certain conditions (same as oxygen, because nitrous oxide can be decomposed into nitrogen and oxygen at high temperature), but it is stable at room temperature, has slight anesthetic effect, and can make people laugh. It is soluble in water, ethanol, ether and concentrated sulfuric acid. Its anesthetic effect was studied by Humphrey, a British chemist, in 1799; David found out. The gas was used for dental surgery anesthesia in the early stage

physical properties of nitrous oxide
melting point - 90.8 ℃ K ({{{2}})
boiling point - 88.49 ℃ K ({{{2}}})
critical point 36.5 ℃
7265 bar

formation
nitrous oxide and water can be formed by heating or impacting ammonium nitrate. NH4NO3 = N2O + 2H2O
nitrous oxide with purity of 95% can be prepared by thermal decomposition of ammonia nitrate in instry. When a large amount of nitrous oxide is dissolved in water, and then the water is cooled, there will be nitrous oxide crystals. If you heat the crystal, nitrous oxide will escape. People use the nature of nitrous oxide to proce high purity nitrous oxide<

preparation of nitrous oxide

[principle] ammonium nitrate melts at 169.5 ℃ and decomposes into nitrous oxide and water at 220 ℃
NH4NO3 N2O + 2H2O

[supplies] large test tube, iron stand, alcohol lamp, water tank, gas collector, ammonium nitrate
[operation]
1, Dry ammonium nitrate thoroughly. Then grind it with a dry mortar, and then dry it at 80-100 ℃. Quickly put it into a bottle and stopper it for storage

2. Take 2G of the above dried ammonium nitrate, add it to the dried test tube, assemble it according to the drawing, and heat it (cut short the core of the alcohol lamp to make the flame not too big). Ammonium nitrate melts into liquid, and then bubbles roll like water boils. Nitrous oxide gas was collected by drainage method< The heating temperature of this experiment should not be too high. If the temperature is too high, nitrogen, nitric oxide and nitrogen dioxide may be generated. Especially in high temperature, it is easy to cause explosion< 2. The dosage of ammonium nitrate should be controlled at about 2G to avoid explosion

3. The test tube mouth should be slightly lower than the level. In this way, the water generated by the reaction will not come into contact with the heating part, causing the tube to rupture< In theory, 610ml of nitrous oxide can be collected from 4.2g ammonium nitrate at room temperature and atmospheric pressure, but only 300ml of gas can be collected from partial melting ammonium nitrate with the generated water flow, and a 250ml gas collecting cylinder is enough.

5. Chlorine (Cl2) is a diatomic molecule composed of two chlorine atoms, Chlorine is yellowish green. When the pressure is 101kpa and the temperature is - 34.6 ℃, chlorine liquefies into liquid chlorine. When the temperature continues to cool to - 101 ℃, liquid chlorine becomes solid chlorine.
chlorine is toxic and has strong irritation. Breathing a small amount of chlorine will stimulate the mucous membrane of the nose and throat, causing chest pain and cough. Breathing a large amount of chlorine will lead to death, When you smell chlorine in the laboratory, you must be very careful and use your hands gently

9. Methane
CH4
sulfur dioxide
SO2
sodium hydroxide
potassium permanganate
KMnO4
potassium chlorate
KClO4
heavy metals (Cu, Pb, Zn, Fe, Mn, Au, AG) and their salts (CuSO4, ZnSO4, etc.) and salt solutions (copper sulfate solution, zinc sulfate solution, etc.)