Inorganic Acids

Benzocaine hydrochloride is the hydrochloride form of the local anesthetic Benzocaine. Its pharmacological action is the same as that of Benzocaine and its anesthetic effect is weaker than that of procaine.Local absorption is slow and long-lasting.Because insoluble in water, can not be used as infiltration anesthesia, analgesic, antipruritic effect, drugs usually made of powder or oil paste, clinical for the treatment of wounds, ulcers, burns, skin abrasions and hemorrhoids, etc. Benzocaine also known as aminobenzoate ethyl ester, sinecetine.The precipitates from water are colorless or white rhombic needle-like crystals or crystalline powder, and the precipitates from ether are square crystals.Odorless.Has a bitter taste.The molecular weight is 165.19.Melting point is 92 ℃.Boiling point 310℃, 183 ~ 184℃(1.87×103Pa).Insoluble in water, soluble in ethanol, ether and chloroform, but also soluble in almond oil, olive oil and dilute acids.Stable in the air. Taking p-nitrotoluene as raw material, in sulfuric acid, with sodium dichromate oxidation, p-nitrobenzoic acid, ethanol esterification reaction, separation, p- nitrobenzoic acid ethyl ester in acetic acid solution, iron powder at 85 ~ 95℃ reduction, benzocaine crude product.After separation, washing with water, and then recrystallization in ethanol refining. To contact me amywang@hbatun.com , Whatsapp : +86 13031440310, Facebook :

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At room temperature, procaine hydrochloride is a fine white needle-like crystal or crystalline powder, odorless, slightly bitter and tingling, easily soluble in water, soluble in ethanol, slightly soluble in chloroform, almost insoluble in ether.In the structure of procaine hydrochloride, the ester bond can be hydrolyzed to form p-aminobenzoic acid and diethylaminoethanol. Under certain conditions, p-aminobenzoic acid can be further decarboxylated to form toxic aniline.The structure of procaine hydrochloride has aromatic amino group, which is easy to oxidize and change color. The oxidation and change color can be accelerated by pH value, temperature, ultraviolet light, oxygen and metal ions. Hydrochloric acid procaine is a local anesthetic, can temporarily block the conduction of nerve fibers and has an anesthetic effect, strong effect, low toxicity, and no addiction, but on the skin, mucous membrane penetration is weak, not suitable for surface anesthesia, clinical mainly used for infiltration, spine and conduction anesthesia. The aqueous solution of this product is stable in pH3.0 ~ 5.0.Therefore, when preparing procaine hydrochloride injection, it is generally necessary to add acid to adjust pH3.3 ~ 5.5, and strictly control the sterilization temperature and time. It is advisable to circulate steam for sterilization at 100℃ for 30min, and attention should be paid to shading and airtight preservation.This product structure of the aromatic amino in dilute hydrochloric acid, with sodium nitrite to generate diazo salt, coupled with basic β-naphthol reaction, the generation of scarlet azo compounds. To contact me amywang@hbatun.co , m Whatsapp : +86 13031440310, Facebook : ,  +86 13031440310, Signal : +86 13031440310 , Hebei ATUN Trading Co., Ltd. 网址：http://www.hbatun.com/ Haiyuet , iandi B906 Yuhua West Road,Shijiazhuang,Hebei,China Goods can be transported anywhere in the world

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White crystals soluble in water, soluble in organic solvents Used for compound anesthesia and chemical assurance, sedation for horses, cattle, sheep, cats and dogs. To contact me amywang@hbatun.com , Whatsapp : +86 13031440310, Facebook : +86 ,  13031440310, Signal : +86 13031440310 H , ebei ATUN Trading Co., Ltd. 网址：http://www.hbatun.com/ Haiyuet , iandi B906 Yuhua West Road,Shijiazhuang,Hebei,China Goods can be transported anywhere in the world

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Chemical properties: white shiny flake crystal or white crystalline powder.Melting point 137-138℃, refractive index 1.571.Insoluble in water, slightly soluble in ether, slightly soluble in boiling water, soluble in ethanol and chloroform.Soluble in concentrated sulfuric acid does not show color, into the solution after the drop of nitric acid is orange.Odourless, slightly bitter taste. It is mainly used as antipyretic and analgesic drug. It has a slow and lasting effect on headache, neuralgia, arthralgia and fever, but it has a weak anti- rheumatism and anti-inflammatory effect.Excessive dose can lead to methemoglobin disease, resulting in hypoxia of the body, long-term drug use can damage the kidney, even cause nipple necrosis, should be used with caution. To contact me amywang@hbatun.com< , br>Whatsapp : +86 13031440310, Facebook :  , +86 13031440310, Signal : +86 13031440310 Hebei ATUN Trading Co., Ltd. 网址：http://www.hbatun.com/ Haiyuet , iandi B906 Yuhua West Road,Shijiazhuang,Hebei,China Goods can be transported anywhere in the world

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Dongguan Wanhang Electronics Technology Co, Ltd. is one of professional centrifugal fan manufacturers. We provide DC Micro Fans, axial fan dc 24v 80x80mm, 120mm axial fan, DC Micro Blowers, dc motor cooler and so on. Want to know more? Please contact us. WHEE DC axial fans are widely used in mechanical heat dissipation due to their advantages of good heat dissipation effect, long service life, simple structure and easy installation. We offer quality DC axial flow fans from 80mm to 120mm. All our DC axial cooling fans are designed to meet UL, CUL and CE standards. Find specially designed axial fan supplied by the certified axial fans manufacturer from China.

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Lanso Instruments Inc.,pressure gauge manufacturers, is a Canada- based industrial products manufacturer & supplier specializing in pressure measurement devices. The company's extensive product portfolio and dedication to high-quality products ,such as pressure measurement device,gas density monitor,gas density switch,gas density transmitter,pressure gauge and so on,have earned us high brand recognition and established long-term partnerships with multinational corporations including ABB, HYOSUNG, TOSHIBA, SCHNEIDER, SIEMENS, and so on. Density switch is a kind of gas density monitor used to monitor the density of SF6 gas in a sealed container. It can display the density of gas on site and give an alarm when the density value reaches the set value. It is suitable for the high pressure measurement of high pressure system. Can provide new substation supporting and existing substation intelligent transformation and other solutions. Lanso is one of a leading gas density switch supplier, providing a variety of gas density switch products with top-quality and high-accuracy.

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