Browse 961 Chemical Products and Raw Materials
EDTA-MgNa2 5.5%
Product name: Magnesium sodium ethylenediaminetetraacetate (EDTA-MgNa2)
EDTA-ZnNa2 14.5%
Product Name: Zinc Sodium Ethylenediaminetetraacetate (EDTA-ZnNa2)
EMBKC 50%/80%
A long-chain quaternary ammonium salt used as a disinfectant in hospitals, nursing homes, public places, and industry. And bactericidal algicides in swimming pools and industrial water treatment. Wood preservation, and disinfection of medical devices. It can even be used as a deodorant.
EOSIN
Water soluble eosin Y is a kind of chemically synthesized acid dye. It dissociates into anions with negative charge in water, and combines with cations with positive amino charge of protein to dye cytoplasm. Cytoplasm, red blood cell, muscle, connective tissue and eosinophilic particles are dyed red or pink in varying degrees, which is in sharp contrast with blue nucleus.
ERBIUM
Element symbol Er, atomic number 68, in the periodic table of chemical elements in the sixth period, lanthanide (IIIB group) 11, atomic weight one hundred and sixty-seven point two six The element name comes from the discovery site of yttrium earth. In 1843, mossander, a Swedish scientist, discovered the oxide of erbium from yttrium soil by the method of graded precipitation, which was officially named in 1860. The content of erbium in the crust is 0.000247% , existing in many rare earth ores.
EUROPIUM
Europium is a kind of metal element, silvery white, which can be burned into oxides; the oxides are almost white. Europium is an iron gray metal, with a melting point of 822 ° C, a boiling point of 1597 ° C and a density of 5.2434g/cm3. Europium is the smallest, softest and most volatile element in rare earth elements. Europium is the most active metal among the rare earth elements: at room temperature, europium immediately loses its metallic luster in the air and is quickly oxidized into powder; it reacts violently with cold water to generate hydrogen; europium can react with boron, carbon, sulfur, phosphorus, hydrogen, nitrogen, etc. Europium is widely used in reactor control materials and neutron protection materials. As the phosphor of color TV set, it has important application in europium (EU) laser material and atomic energy industry.
Efavirenz
Efavirenz is used as part of highly active antiretroviral therapy (HAART) for the treatment of human immunodeficiency virus (HIV) type 1.
Ellagic Acid
A common plant polyphenol is an inhibitor of glutathione S-transferase. It can be used for the determination of XIIa factor in plasma. Contact activation can occur during blood coagulation.
Emamectin Benzoate
Carbamate benzoate is a kind of non residual and pollution-free biological pesticide. It has a very high activity to the larvae of Lepidoptera and many other pests and mites. It has both stomach toxicity and contact killing effect. It has a very good effect at a very low dose (0.084 ~ 2G / HA). In addition, it has no harm to the beneficial insects in the process of pest control, which is conducive to the comprehensive pest control. In addition, it is also beneficial to the comprehensive pest control In addition, the insecticidal spectrum is expanded and the toxicity to human and livestock is reduced. Methaamamectin benzoate can enhance the function of neuroplasm, such as glutamate and GABA, so that a large number of chloride ions enter into nerve cells, resulting in the loss of cell function and disruption of nerve conduction. The larvae stop eating immediately after contact, causing irreversible paralysis and reaching the highest lethal rate within 3-4 days. Because of the close combination of abamectin benzoate and soil, it is not leached, nor accumulated in the environment. It can be easily absorbed by crops and permeated into the epidermis through movement and transfer, so that the applied crops have long-term residual effect. The second high peak of insecticidal death rate appears in more than 10 days, and it is rarely affected by environmental factors such as wind and rain.
Emtricitabine
Emtricitabine is an analogue of cytidine. The drug works by inhibiting reverse transcriptase, the enzyme that copies HIV RNA into new viral DNA. By interfering with this process, which is central to the replication of HIV, emtricitabine can help to lower the amount of HIV, or "viral load", in a patient's body and can indirectly increase the number of immune system cells (called T cells or CD4+ T-cells). Both of these changes are associated with healthier immune systems and decreased likelihood of serious illness.
Enramycin
Enramycin or Enduracidin is a polypeptide antibiotic produced by Streptomyces fungicidus. Enramycin is widely used as a feed additive for pigs and chickens to prevent necrotic enteritis induced by Gram-positive gut pathogens. Enramycin acts as an inhibitor of the enzyme, MurG, which is essential for cell wall biosynthesis in Gram-positive bacteria. MurG catalyzes the transglycosylation reaction in the last step of peptidoglycan biosynthesis. Inhibiting this step greatly compromises cell wall integrity leading to cell lysis.
Entecavir Hydrate
Entecavir hydrate is a new kind of cyclopentyl acyl guanosine anti-hepatitis b virus medicine with its pharmacological effects similar as entecavir. It is clinically applied to the treatment of adult chronic hepatitis b in which there is active viral replication, increased serum transaminase ALT or active lesions showed from liver histology.
Epirubicin
Epirubicin is one of the drugs selected to treat solid tumors. It acts directly on DNA, interferes with and prevents DNA replication and transcription. It affects the function of mitochondria by inhibiting the activities of respiratory enzymes such as succinate oxidase and NADPH oxidase. It has been found that it can induce apoptosis of cancer cells, which may occur through the mitochondrial pathway of apoptosis. Due to its excretion through the hepatobiliary system, the patients with liver dysfunction should be reduced to avoid accumulation of poisoning; for patients with moderate liver dysfunction (bilirubin 1.4-3mg / 100ml or BSP retention 9-15%), the dosage should be reduced by 50%; for patients with severe liver dysfunction (bilirubin > 3mg / 100ml or BSP retention > 15%), the dosage should be reduced by 75%; for patients with moderate renal dysfunction, there is no need to reduce the dosage, because Only a small amount of the drug is excreted through the kidney. The usage is intravenous administration. It is suggested to inject normal saline first to check the patency of the infusion tube and after the injection needle is indeed in the vein, then to give medicine through the patency of the infusion tube. This method can reduce the risk of drug spillover and ensure that the vein is flushed with saline after administration. If epirubicin overflows the vein during injection, it will cause serious tissue damage or even necrosis. If the same vein is injected in small vein or repeatedly, it will cause venous sclerosis. It cannot be mixed with heparin, because the chemical properties of the two are not compatible, and precipitation reaction will occur at a certain concentration. It can be used with other anti-tumor drugs, but the dosage of epirubicin should be reduced, not in the same syringe Mixed drugs.
Epoxy Resins
All the polymer compounds containing epoxy group in molecular structure are called epoxy resin. The cured epoxy resin has good physical and chemical properties. It has excellent bonding strength to the surface of metal and non-metal materials, good dielectric properties, small variable shrinkage, good dimensional stability of products, high hardness, good flexibility, and stability to alkali and most solvents. Therefore, it is widely used in various departments of national defense and national economy for pouring, impregnation, laminating materials Adhesive, coating and other applications. Epoxy resin has been studied since 1958 in China, and it has been put into industrial production at a very fast speed. Up to now, it has developed vigorously all over the country. In addition to the production of ordinary bisphenol a-epichlorohydrin epoxy resin, various types of new epoxy resin are also produced to meet the urgent needs of national defense construction and national development and economic departments. The preparation methods of epoxy resin are as follows: reaction of active hydrides with epichlorohydrin, liquid-phase oxidation of double bond by hydrogen peroxide or peracetic acid (for example, peracetic acid), air oxidation of double bond compounds.
Erbium(III) Oxide
It is mainly used as yttrium iron garnet additive, nuclear reactor control material, special luminescent glass, infrared absorbing glass and glass colorant. It is obtained by the reaction of erbium nitrate or erbium sulfate solution with alkali, separation and burning. Only Er2O3 is a stable compound. It is a powder with body centered cubic and monoclinic structures. The magnetic moment of Er2O3 is also large, which is 9.5m. B. Other properties and preparation methods are the same as lanthanide elements. Make pink glass.
Eriochrome Black T
Dark brown powder. It is soluble in water and is Zao red to oar red; slightly soluble in alcohol and brownish pinkish red; slightly soluble in acetone. It is dark blue in concentrated sulfuric acid, light red brown after dilution, and orange yellow in concentrated nitric acid. There was no significant change in the aqueous solution and concentrated hydrochloric acid; the concentrated sodium hydroxide solution turned brown and magenta. The solubility in water (90 ℃) is 25g / L. When dyeing, copper and iron are encountered, and the color light has great influence.
Erlotinib Hydrochloride
Erlotinib hydrochloride is a small molecule reversible inhibitor of epidermal growth factor receptor tyrosine kinase, which is mainly used in the second-line or third-line treatment of locally advanced or metastatic non-small cell lung cancer and the treatment of pancreatic cancer.
Ethambutol
Ethambutol (commonly abbreviated EMB or simply E) is a bacteriostatic antimycobacterial medicine prescribed to treat tuberculosis. It is usually given in combination with other tuberculosis medicine, such as isoniazid, rifampicin and pyrazinamide.
Ethephon
The pure product is white needle crystal. m. 74-75 ℃, soluble in water and alcohol, insoluble in dichloroethane and benzene. It is stable under the condition of pH < 3, and releases ethylene under the condition of pH > 3 and alkaline, and releases ethylene and 2-hydroxyphosphonic acid in the plant. Industrial products are light yellow viscous liquid or waxy solid. Organophosphorus plant growth regulator. It can promote the early ripening of all kinds of fruits, such as bananas, oranges, tomatoes, watermelons, etc., can promote rubber, lacquer trees, etc., can promote the early opening of female flowers and more female flowers of cucumbers, can be used for accelerating the ripening of cotton and tobacco leaves, and can also inhibit plant growth, make plants shorter, break seed dormancy and other functions. Half a month before early frost, cotton was sprayed with water of 40% ethephon 15 to 22.5g/100m2. When banana was treated with 0.2-2g/l ethephon aqueous solution, ripening was accelerated.
Ethofumesate
Application:After before bud bud herbicide. With 1.0 ~ 2.0 kg/ha (A.I.) dose; Herbicide, beet, sod, ryegrass and other pastures in the weeds. This product can effectively control many important gramineae and broadleaf weeds and longer its effect in the soil. Dosage of sugar beet in 1.0 ~ 3.0 kg/ha, but cefuroxime straw colour with other beet with the tag type mixed herbicides barrel recommended dosage is 0.5 ~ 2.0 kg/ha of strawberry, sunflower and tobacco based on different periods of administer the drug has good tolerance. The resistance of medium of onion.
Ethyl Vanillin
Ethyl vanillin, also known as ethyl vanillin, is a white to yellowish scale crystalline powder, presenting sweet chocolate aroma and vanillin unique fragrance, basically harmless, widely used in perfumery, cosmetics, food additives, medicine and other industries. The first flavor of human synthesis is vanillin, which was synthesized by Dr. M. and Dr. G. in 1874.
Ethylene Glycol
Mainly used as a raw material for polyester fiber, and used in other polyester resins, unsaturated polyester resins and 1730 polyester paint. Many types of surfactants can be derived from ethylene glycol and polyethylene glycol. Its dinitro compound dinitroglycol is an explosive. Ethylene glycol can lower the freezing point of aqueous solutions, so it is often used as an antifreeze.
Ethylene Thiourea
It can be used as an accelerant of chloroprene rubber, chlorosulfonated polyethylene and acrylate adhesive with a reference dosage of 0.25-1.5 phr. It is also used as an accelerant of polysulfide rubber. It can also be used as an accelerator of dicyandiamide curing agent for epoxy adhesive with a reference dosage of 8 phr.
Etidronic Acid
Hydroxyethylidene diphosphonic acid (HEDP), chemical product, an organic phosphoric acid scale and corrosion inhibitor, can form stable complexes with iron, copper, zinc and other metal ions, and can dissolve oxides on the metal surface.
