benzoic acid
Its chemical formula was C6H5COCH. It was the simplest aromatic acid, a scale-like or needle-like crystalline organic compound. The molecular mass was 122.12 g/mole, and the density was 1.3 g/cm. It is slightly dissolved in water, but it is also dissolved in organic liquids such as alcohol, aether, chlor-3-ol, and so on. It is weakly acidic, and its acidic property is stronger than that of ordinary fatty acid. Its thermal stability is poor. Its chemical properties depend on the aromatic ring and the aromatic group. The aromatic ring can undergo substitution reaction, dehydration reaction, and decylating reaction; the aromatic group can react with alkalium, alcohol, chloridizing agent, etc. Powder or granules of sulfuric acid may cause a dust explosion when mixed with air. It was widely used in the chemical industry. It could be used in the production of phosphorus acid, phosphorus dioxide, and hexagon. It could be used in the production of dimple, dipropylethlene, and dipropylethlene to form an ester. It could be used as a antiseptic to kill bacteria. It could be used to dip small steel packaging paper and water-based paint to prevent corrosion of parts. It could be used in the anti-freezing agent of engine coolants, and it could be used in combination with NaNO3 to protect cast iron. It can be used to improve the performance of various alkyds; it can be made into an ointment with Salicolic Acid to treat skin mycoses and superficial mycoses; it can also be used as a dye carrier. In free form or in the form of salt and ester, it is widely found in the bark of wild black cherry trees, cranberries, dried plums, chrysanthemum, plum, laurel, and cloves. Herbivores 'urine contains a small amount of the gly lic acid derivative of the sulfuric acid, namely, the methylam acid. The toxicity of the sulfuric acid was relatively low, but the crystallites or dust would irritate the skin and the respiratory system. If it splashed into the eyes or on the skin, it would quickly solidify and rapidly burn the skin. Inhaling the high-temperature vapor of sulfuric acid can cause spasmodic cough, nasal sinusies, and sometimes nausea and vomiting. Animals would be anesthetized, tremble, and twitch after being poisoned.
Can colchinic acid tablets lower uric acid?
Colquin tablets couldn't lower UA. Colchiine was mainly used to treat acute episodes of gouty Arteritis and prevent acute episodes of relapsing gouty Arteritis. It had anti-inflammatory and pain-relieving effects.
Acid cement
Silicate cement was a kind of hydraulic cementation material, and its main component was calcium Silicate. According to domestic standards, the cement was made of cement clinkers, limestone or pulverized blast furnace slag, and a suitable amount of fine plaster. There were two types of portland cement. One was portland cement without mixing materials, and the other was portland cement with mixing materials. The portland cement has the characteristics of fast setting and hardening, high early strength, and good frost resistance. Ordinary portland cement was a type of portland cement. It had a fast hydrating reaction speed and high early and late strength. The composite portland cement is a hydraulic binding material made of portland cement grog, two or more mixed materials, and an appropriate amount of plaster. White portland cement is a kind of hydraulic binding material made of portland cement with less iron dioxide content. In general, portland cement was a common cement type with many types and uses.
malonic acid
Malonic acid, also known as malonic acid, carrotonic acid, betainic acid, the molecular formula is HOOCCH <2 <COOH, a white flake crystal. Its density is 1.63 g/cm 3, melting point is 135.6 ° C, boiling point is 140 ° C, and it will decompose when it reaches the boiling point. Malonic acid is easily dissolved in water, alcohol, and ether. It can sublimate in a vacuum, and its dissolution in water is 74%. It has poor thermal stability and is easy to decompose into carbon dioxide and sulfuric acid when heated. The methyls in the molecules are more active and can undergo various types of reactions. In the industry, it was commonly used to prepare malonic acid by the method of decomposing cyanaconic acid. Malonic acid was mostly used to make drugs. It could damage the skin and mucus membranes, but the degree was not as good as that of sulfuric acid. In addition, malonic acid exists in the form of calcium salt in the beetroot, and the scale deposited in the concentrating tank of the sugar beets is called calcium malonate.
terephthalic acid
Teremartial acid, also known as p-sulfuric acid, had a molecular formula of C8H6O4, and was the most widely produced dicarbonic acid. It was solid at room temperature, sublimated when heated above 300 ° C, and melted at 427 ° C when heated in a closed container. It is white crystal or powder.(g/mL,20 ° C) is 1.51, melting point is>300 ° C, flash point is 260 ° C, gas phase standard combustion heat (kJ·mole- 1) was-3329.50, the gas phase standard claimed heat (heat)(kJ·mole- 1) was-717.89, the crystal phase standard combustion heat (heat)(kJ·mole- 1) was-3189.42, the crystal phase standard claimed heat (heat)(kJ·mole- 1) was-816.13, and the vapor pressure (mmHg, 20oC) was <0.01. It is not dissolved in water, carbon dioxide, ether, and acetic-acid. It is slightly dissolved in alcohol and is dissolved in soda. Low toxicity, its toxicity is basically the same as that of ortho-acid. For rats, the oral lethal dose was 6.0g/kg, and the lethal dose was 800g/kg. The irritation to the skin is not as strong as that of orthoactic acid, and it does not show any signs of sensitizing. However, for allergic people, contact with this product can cause rashes, bronchial asthma, or bronchitis. Dust masks should be worn during the operation. The maximum permitted concentration in the air is 0.1kg/m3. It was a raw material for the production of pet (especially pet), synthetic resin, synthetic fiber, and plasticizer. It could also be used as a reagent for analytical analysis. In the industry, the high-temperature liquid-phase fermentation method with p-rex as the raw material was mostly used for production. There were also production methods such as low-temperature p-rex fermentation method, the substitution method of sulfuric acid, and the method of methylethene disproportionation. In the high-temperature liquid-phase oxidization method with p-rex as a raw material, the sulfuric acid was used as a catalyst, the co-catalyst was Cobalt acetate-Manganese acetate-Manganese acetate-Tetra-Bromo-Ether as a co-catalyst, and the sulfuric acid was generated at 221 - 225 ° C and 2.5 - 3.0MP. The sulfuric acid was in the form of mud, and after centrifugal separation and drying, the crude sulfuric acid was obtained, and then the fiber grade sulfuric acid was obtained through subsequent treatment.
Is 'A is for Acid' a true story?
Yes, it is. 'A is for Acid' is based on real events and characters.
lead acid and water
The correct way to add water to a lead-acid battery is to use a plastic funnel to slowly pour distilled water or Deionized water into the battery to ensure that the water does not splash on the battery casing or other components, and to avoid pouring water into the battery's charging port or other non-water-adding ports. After adding water, close the battery cover in time and screw it tightly to prevent the water from evaporating. Before adding water, first check whether the battery level is lower than the indicator line. Only when the liquid level is lower than the indicator line do you need to add water. Use distilled water or Deionized water to add water. Do not use tap water or other water containing impurities to avoid affecting the battery's working effect. When adding water, pour water slowly to avoid splashing on the battery casing or other components to avoid short circuit or other failures. Adding too much water would cause the battery to overflow, reduce performance, accumulate water in the box, and corrode. In serious cases, it might cause the battery to short-circuit. Therefore, it is necessary to add a small amount of water many times. It is strictly forbidden to add too much water to exceed the maximum liquid level.
fruit acid peeling
Fruit acid peeling was a chemical peeling technique that used fruit acid (an acidic chemical extracted from a variety of fruits, such as gly colic acid, gly colic acid, malic acid, citric acid, etc.) to remove dead skin cells on the surface of the skin, promote the growth of new cells, and thus improve the quality of the skin. The principle was that the corrosive effect of the fruit acid could remove the aged corneous cells on the skin surface. It can be used to treat a variety of skin problems, such as relieving acne, pustules, and acne (by shedding the inflamed cuticular layer, it can solve the problem of excessive cornealization and blockage of pores), improving the dullness of the skin (the shedding of the cuticular layer can take away the dark granules and hyperchrominism), solving the dark yellow skin aging, smoothening fine wrinkles, improving rough skin and so on. There were many advantages to fruit acid skin rejuvenation. The fruit acid was natural and had no toxic effects on the skin. The skin rejuvenation process was fast, painless, and easy to operate. It could obviously improve the skin color and tender the skin. It could also promote the synthesis of colloid and ha to a certain extent and enhance the skin's water retaining ability. However, there were also limitations. Compared with laser, injection and other cosmetic methods, fruit acid peeling would cause the stratum corneum to separate from the skin, which was more traumatic. The recovery period was longer, about one week of scab period. After treatment, it was necessary to pay strict attention to replenishment and sun protection, which was more troublesome to take care of. The acid brushing in the hospital (using a high concentration of fruit acid or sal acid to brush on the face to rejuvenate the skin) was a real acid brushing. It was mainly used to improve acne. It could also be used for stable melasma or uneven coloring, to delay skin aging, and to improve pores. Salicolic acid might be chosen for oily skin inflammation and more acne. For other types, there were more fruit acid choices. The concentration of fruit acid could be adjusted, and the formula could also be adjusted to target different skin problems. For example, adding almond-like acid based on gly acid could better target red and swollen acne, and adding lemon acid might achieve a better whiteness effect. The fruit acid skin rejuvenation needed to be performed by professional medical staff in a professional medical institution. During the treatment, the patient might feel a slight stinging or burning sensation. After the surgery, the skin may appear red, swollen, scab, peeling, etc. However, these symptoms usually subsided naturally within a few days. In addition, there were care products specifically used to relieve sensitive skin after fruit acid skin rejuvenation, such as the medical-grade Minbai Ling Hyaline Solution imported from France, which could reduce the secretion of inflammatory mediator, moisturize, eliminate free radical, promote cell growth, inhibit skin aging after light, and improve skin deficiency.
The weakest acid in the world
There were many kinds of acid that were considered weak. The acid that was weaker than carbolic acid was hydrogen dioxide, metaaluminum acid, hypochloric acid, and so on. There was also a view that hypochloric acid was the weakest acid. Click on the link below to read "The Strongest in History" comic
Is aqua the strongest acid?
No, it wasn't. Although the aqua acid was extremely corrosive and could dissolve precious metals such as gold and platinum, the strength of the acid was not completely the same as the strength of the corrosion. In the field of chemistry, there were other acids that were more acidic than aqua dire, such as superacid such as fluorantimonic acid. Click on the link below to read "The Strongest in History" comic
What is the strongest acid?
The strongest acid known on the surface was fluoantimonic acid, which was 200 trillion times more acidic than pure sulfuric acid. However, in the middle and high school, the strongest acid was peraconic acid. It was an acidic and highly oxidogenic acid. The chloride-ion had a +7 valency, and the acid acid was diclorine heptoxy. Click on the link below to read "The Strongest in History" comic