Group 1 - The article discusses the latest pricing and specifications for a fire-retardant agent used in coal mines, highlighting its effectiveness and chemical properties [1] - The fire-retardant agent has a suppression rate greater than 50%, a lifespan of 300 minutes, and a corrosion rate of less than 0.02 [1] - The product is offered by Henan Huiyi Hai Water Purification Materials Co., Ltd., and is priced at 500 yuan per ton, sourced domestically from Shanxi Province [1]