Potassium bicarbonate dry chemical fire extinguishers, as the principal component of the Purple-K dry chemical, and in some applications of condensed aerosol fire suppression. It is the only dry chemical fire suppression agent recognized by the U.S. National Fire Protection Association for firefighting at airport crash rescue sites. It is about twice as effective in fire suppression as sodium bicarbonate. Potassium bicarbonate is an effective fungicide against powdery mildew and apple scab, allowed for use in organic farming. Potassium bicarbonate has widespread use in crops, especially for neutralizing acidic soil. The word "saleratus", from Latin "sal æratus" meaning "aerated salt", was widely
Potassium tert-butoxide Potassium tert-butoxide Potassium "tert"-butoxide is the chemical compound with the formula K(CH)CO. This colourless solid is a strong base (pKa of conjugate acid around 17), which is useful in organic synthesis. It exists as a tetrameric cubane-type cluster. It is often seen written in chemical literature as potassium "t"-butoxide. The compound is often depicted as a salt, and it often behaves as such, but it is not ionized in solution. Potassium "t"-butoxide is commercially available as a solution and as a solid, but it is often generated "in situ" for laboratory use because samples are so sensitive and older samples