adjustor; regulator; modifier; conditioning agent
Technical term in chemistry for a substance added to adjust, regulate, or modify a process or property.
この調整剤はpHを安定させるために使われる。
This regulator is used to stabilize the pH.
塗料に調整剤を加えると粘度が変わる。
Adding a modifier to the paint changes its viscosity.
Compound of 調整 (adjustment) + 剤 (agent, preparation).