pHtila
pHtila is a term that appears in some educational simulations and speculative writing to refer to a hypothetical pH-sensitive indicator or reagent. It is not an established chemical or a standard term in professional chemistry, and there is no universally accepted definition. In pedagogy, pHtila is often used as a placeholder to illustrate how colorimetric indicators respond to pH changes and how calibration can affect readings.
In concept, pHtila can be described as either a single multi-state indicator or as a small family
Etymology and usage vary by author. The name combines the familiar term pH with the suffix -tila,
In fiction and speculative contexts, pHtila may be portrayed as a rare mineral, engineered reagent, or biological-style
See also: pH, pH indicator, acid-base indicator, buffering systems, colorimetric sensors.