At present, well-known brands are doing better in environmental protection, such as Dulux, which is a wall paint widely used by ordinary families. No matter what kind of wall paint will contain formaldehyde more or less, it is just a matter of concentration. After decorating the house, ventilate it for three months, put some freshener in it and then test it. After the formaldehyde concentration is lower than the national standard, let the family live in it. But I personally mind using diatom mud on your wall. Especially for people with old people and children at home, diatom mud is the most environmentally friendly wall material on the market now. Friend, you can learn more about diatom mud.
I hope it helps you!