You can e-mail the company, Google just in case someone else has tested or asked (see below), or purchase some pH test strips for any products you already own. If they say 'pH balanced' that often means neutral or 7. Komaza Care and As I Am brands offer lower pH haircare products.
The Scoop on Vinegar
THE NATURAL HAVEN: pH of Shampoo : The Ultimate List!
THE NATURAL HAVEN: pH of Conditioners
THE NATURAL HAVEN: pH of Leave In Conditioners and Styling Aids
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.