This standard describes both dry potassium permanganate (KMnO4) crystals, CAS no. 7722-64-7, and liquid sodium permanganate (NaMnO4) solutions, CAS no. 10101-50-5, for use in the treatment of potable and reuse or reclaimed water and wastewater. This standard can be referenced in documents for purchasing and receiving permanganates and can be used as a guide for testing the physical and chemical properties of permanganate samples. The stipulations of this standard apply when this document has been referenced and then only to permanganates used in potable water, wastewater, and reuse or reclaimed water. Downloadable versions of current and historical standards are also available.