One Equity Partners-backed RSI Chemicals, an oilfield service company focusing on formulating, manufacturing and providing customized specialty oil and gas chemicals, completed the merger with Imperative Chemical Partners, a provider of specialty chemicals. Financial terms were not disclosed. “The combination of these two exceptional companies will change the landscape in the US land oilfield chemicals market with cultural alignment, a quality management team, a talented and motivated workforce that execute flawlessly, and a combined product line that spans the chain of custody for all chemical needs for completions, flowback, production and midstream operations,” Neil Harrop, Imperative Chemical CEO.