A chemical group containing sulfur and oxygen, often found in cleaning products and dyes.
Sulfo is a word used in chemistry and industry.
Examples:
The soap has sulfo in it.
I need to buy some shampoo without sulfo.
Sulfo is used in making colorful dyes.
The sulfo in the cleaner makes it work better.
The scientist mixed the sulfo into the solution.
The factory uses sulfo to make the soap.