怡达股份：公司主要产品为醇醚及醇醚酯系列产品、环氧丙烷、双氧水等

Core Viewpoint - The company, Yida Co., Ltd. (stock code: 300721), primarily produces alcohol ether and alcohol ether ester series products, propylene oxide, and hydrogen peroxide, with some wet electronic chemicals used as cleaning agents, stripping liquids, and etching liquids for photoresist substrates [1] Group 1 - The main products of the company include alcohol ether and alcohol ether ester series products [1] - The company also produces propylene oxide and hydrogen peroxide [1] - Some of the company's wet electronic chemicals serve as cleaning agents, stripping liquids, and etching liquids for photoresist substrates [1]