[2022-08-26]
Intermediates are a very important type of fine chemical products, in essence, they are a kind of "semi-finished products", mainly used in the synthesis of pharmaceuticals, pesticides, coatings, dyes and fragrances.
[2022-07-25]
Ranitidine hydrochloride is an organic compound with the molecular formula C13H23ClN4O3S, a whitish or yellowish crystalline powder with an odour, slightly bitter and astringent taste. It is extremely hygroscopic. It is readily soluble in methanol or water or acetic acid, slightly soluble in ethanol and slightly insoluble in chloroform or acetone.
In this paper, the dehalogenated coupling method of 4-bromo-phthalic anhydride was used, i.e., the reaction of phthalic anhydride with bromosol to form the sodium salt of 4-bromo-phthalic acid, followed by a two-step reaction of dehalogenated coupling and dehydration to produce BPDA.
[2022-06-25]
BPDA (3,3',4,4'-biphenyltetracarboxylic dianhydride) is the raw material of polyimide resin, one of the super engineering plastics, and is used as an important component material for many products in the information and electronics field such as cell phones and copiers.
[2022-06-13]
Heliotropine, also known as jasmine aldehyde, chemically known as 3,4-dioxymethylene benzaldehyde (3,4-methylenedioxy benzaldehyde), is widely used in synthetic fragrances, pharmaceuticals, food, daily chemicals, electroplating, etc.
You may have heard about API and Intermediates, but do you know the difference between them? We will show them in this blog.
[2022-05-12]
Ranitidine is used to treat stomach and intestinal ulcers and to prevent them from coming back after they have healed. This drug is also used to treat certain stomach and throat (esophageal) problems. It works by reducing the amount of acid produced by the stomach.
[2022-04-24]
The method of manufacturing aromatic polyimide by BPDA can be any one of the following methods: the method of manufacturing by polymerization of BPDA with aromatic diamine, the method of closed-loop imidation of polyamic acid obtained by polymerization of BPDA with aromatic diamine at a low temperature near room temperature.
Piperonal, also known as Piperaldehyde, is an organic compound commonly found in flavors and fragrances. The molecule is structurally related to other aromatic aldehydes such as benzaldehyde and vanillin.
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