Chongqing Tonghui Gas Co., Ltd., founded in 2007 and headquartered in Tongnan High-tech Zone, runs 15 subsidiaries. We specialize in R&D, production and sales of high-quality gases, including food-grade nitrous oxide (N₂O), liquid CO₂, high-purity CO₂ and electronic-grade specialty gases, with long-term cooperation with Coca-Cola, Pepsi, Häagen-Dazs and Molly Tea. Our “ROTASS” brand provides food-grade CO₂, N₂O and related gas solutions for the food industry. The 45,000㎡ cream charger factory realizes full-process production with fully automatic filling, reaching 99.95% purity and meeting global food-grade standards. Surface treatment ensures stable quality and appearance. Supported by self-owned hazardous goods transport and overseas warehouses in the US and Europe, we export to more than 20 countries, offering reliable and on-time supply for global wholesalers and distributors.





