sdic dihydrate 20g tab CAS 51580-86-0 chlorine1
3 year ago
Benzalkonium Chloride (BAK or BAC) is the most commonly used preservative in ophthalmic preparations. Benzalkonium chloride has been included in the FDA's Guide to Inactive Components for use in ophthalmic preparations, etc., at concentrations ranging from 0.004% to 0.025% in various eye drop products. Contraindicated with aluminium, anionic surfactants, raffinate, hydroxypropylmethylcellulose, iodide, sulfonamides, zinc sulfate. Benzalkonium chloride is a cationic surfactant broad-spectrum bactericide, can change the permeability of bacterial cytoplasmic membrane, so that the bacterial cytoplasmic material extravasation, impede its metabolism and play a role in killing, the role of Gram-positive bacteria is stronger, on Pseudomonas aeruginosa, acid-resistant bacilli and bacterial spores are ineffective. It can combine with protein rapidly, and the effect is significantly reduced in the presence of blood, cotton, cellulose and organic matter.
Benzalkonium chloride (quaternary ammonium salts), commonly used in imported eye drops, has a broad antibacterial spectrum. For example, this preservative is used in Palotan, Parrot, Shine, and so on. Benzalkonium chloride preservative commonly used concentration of 0.01%, its mechanism of action: cationic surfactant, adhering to the surface of microbial cells, increasing the permeability of the cell membrane, leading to cell lysis. Easily soluble in water, good stability, strong bactericidal force.
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（1）Catalysts and Auxiliaries：A catalyst is generally defined as a substance that increases the rate of a reaction without changing the total standard Gibbs free energy change of the reaction. It can also be expressed as a substance that increases the rate of a chemical reaction without altering the chemical equilibrium and whose own mass and chemical properties do not change before or after the chemical reaction.Auxiliaries (auxiliaries; additives) Defined in medicine as excipients and additives used in the production of medicines and in the formulation of prescriptions, i.e., a general term for all materials other than the main active ingredient of the drug, and an important constituent of pharmaceutical preparations.
（2）Organic Raw Materials：The organic raw materials are petrochemicals made of petroleum and natural gas, and the industries of various organic chemical products are produced or fractionated by the raw material gas after coal gasification and the coal tar recovered by dry distillation.Our Organic Raw Materials include Industrial ethylene、Ester compounds、Ether compounds.
（3）Petrochemicals：Refers to the use of oil or natural gas as raw materials, the manufacture of chemicals in the petrochemical industry of manufactured products, the same called petrochemical products.Our Petrochemicals include special oils and fats,Solvent oil, Fuel oil and so on.
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