The KCL fertilizer Alda Holdings supplies are two types: pink and white. It contains about 60% potash and its application does vary from oil extraction through NPK blending till straight soil application.
The SOP comes in two types: powder and granular. It contains 48-52% potash and possesses excellent physical characteristics: it is not hygroscopic and does not cake by storage. It is considered better than the KCL due to the fact that it contains almost no chloride.