Sodium bisulfate is the chemical name. I’m not sure if that could be
translated to Mexican language. Just check the label it should
indicate what chemical it is
Here in Spain, it is called Aqua Fuerte, brand is in my view not
important, I use what ever is cheap for the swimming pool and to
pickle after soldering.
Regarding pool chemical for pickle. I know exactly what your dealing
with. I too live in Mexico. A lot of things just don’t translate. I
found and am using pool chemical and will be happy to share withyou
exactly what I’m using as soon as we get home. It’s working well, but
I want to check the label on the package rather than just telling
youfrom memory.