AWWA B502: 2017 [paper]

This standard describes sodium polyphosphate, glassy, for use in the treatment of potable water, wastewater, and reclaimed water. This material is also known as sodium hexametaphosphate, sodium tetrapolyphosphate, and Graham’s salt.

The purpose of this standard is to provide the minimum requirements for sodium polyphosphate, glassy, including physical, chemical, sampling, packaging, shipping, and testing requirements.