| abstract |
Powdery (poly) piperazine pyrophosphate, which has a whiteness of 80 to 100 as a W value, and a yellowness of 0 to 5 as a YI value, wherein said (poly) piperazine pyrophosphate is a mixture between piperazine pyrophosphate represented by the formula (I): ** Formula ** in which, in the formula (I), the broken lines represent chemical bonds and a poly (pyrazine piperazine) represented by the formula (II): ** Formula * * in which, in formula (II), n is an integer from 2 to 100. |