what is the acidic or alkaline property of shampoo concentrate?

Answer 1

This varies very much with the product and whether or not the shampoo is for animals or humans.

Generally speaking, shampoo concentrates for human use is adjusted to a pH of 6.5 to 7.5, which is very near neutral (7.00).

Rug shampoos are often as basic as pH 12 to 13 and when diluted become a pH of about 9.5.

Simple pH papers are readily available if you need to determine the pH of a specific product.