E 1 and E0 standards are classified by European countries according to the content of free formaldehyde in wood-based panels, and are also the standards used in the production of wood-based panels in China's household industry, that is, E 1 stipulates that the content of free formaldehyde is ≤9mg/ 100g, and E0 stipulates that the content of free formaldehyde is ≤ 3 mg/ 100 g.
In fact, a simple understanding is that "E 1 floor" refers to the floor that meets the national environmental protection standards and the average formaldehyde emission is less than 1.5 mg/L, and "E0 floor" refers to the floor with the average formaldehyde emission less than 0.5 mg/L and the emission close to zero.
Extended data
The main harm of formaldehyde is irritation to skin and mucosa. When indoor formaldehyde reaches a certain concentration, people will feel uncomfortable. More than 0.08 mg/m? The concentration of formaldehyde can cause envy, itchy eyes, sore throat, hoarseness, sneezing, chest tightness, asthma, dermatitis and so on. The high formaldehyde content in newly renovated rooms is the main cause of many diseases.
Baidu encyclopedia-formaldehyde