Other Chemical Drugs

This product mainly uses rosuvastatin calcium intermediate

Trifluoromethanesulfonic acid is widely used. It is one of the most powerful organic acids known. It is a versatile synthetic tool. With strong corrosiveness and hygroscopicity, it is widely used in medicine, chemical industry and other industries, such as nucleosides, antibiotics, steroids, proteins, sugars, vitamin synthesis, silicone rubber modification, etc. It can also be used as a catalyst for isomerization and alkylation to prepare 2,3-dihydro-2-indanone and 1-tetrahydronaphthalene ketone and remove glycosides from glycoproteins.

Sulfamethazine sodium is a sulfonamide, which can induce the expression of CYP3A4 in vivo. It is acetylated by N-acetyltransferase and used in the infection caused by meningitis, pneumococcus, hemolytic streptococcus and some gram-negative bacilli.

Xanthan gum, also known as xanthan gum and Hansen gum, is an extracellular acidic heteropolysaccharide produced by fermentation of Xanthomonas. D-glucose, D-mannose and D-glucuronic acid are high molecular weight polysaccharides with a ratio of 2:2:1. The secondary structure of xanthan gum is that the side chain is reversely wound around the backbone of the main chain, and the rod like double helix structure is formed by hydrogen bonding. Xanthan gum is a light yellow to white flowable powder with a slight odor. It is soluble in cold and hot water, neutral, resistant to freezing and thawing, insoluble in ethanol. When it meets with water, it disperses and emulsifies into a stable hydrophilic viscous colloid. Xanthan gum is a kind of biological gum which integrates thickening, suspension, emulsification and stabilization, and has the best performance in the world, so it is widely used in more than ten fields such as food, petroleum, medicine and daily chemical industry. In food: many foods are added xanthan gum as stabilizer, emulsifier, suspending agent, thickener and processing aid. In daily chemical industry: Xanthan gum contains a large number of hydrophilic groups, which is a good surfactant, and has antioxidant, anti-aging and other effects. In medicine: Xanthan gum is a functional component of microcapsule material which is popular in the world and plays an important role in controlling drug release. In petroleum industry, because of its excellent salt resistance and heat resistance, it is widely used in drilling in special environment such as ocean and high salt zone, and can be used as oil displacement agent to reduce dead oil area and improve oil recovery.

Methylcellulose is widely used in construction industry, such as cement, mortar, joint desliming and so on. It is used as film-forming agent and adhesive in cosmetics, medicine and food industry. It is also used as sizing agent for textile printing and dyeing, synthetic resin dispersant, coating film-forming agent and thickener. Alkali cellulose is prepared from pulp, which reacts with methyl chloride or dimethyl sulfate in an autoclave, and then refined with warm water. Methylcellulose is generally considered safe, non-toxic, non allergenic and non irritating. In the pharmaceutical industry, methylcellulose with low or medium viscosity can be used as the adhesive of tablets and also for tablet coating. High viscosity methylcellulose can be used to modify disintegration or as skeleton material of sustained-release preparation. Methylcellulose with high degree of substitution and low viscosity can be used for aqueous coating, suspension aid, thickener, emulsion stabilizer and protective colloid. High degree of substitution and high viscosity methyl cellulose can be used in eye drops, and can also be used as matrix material for cream or gel.