The newly issued "Synthetic Materials of Sport Surface for Primary and Secondary Schools" (Draft for Soliciting Opinions) clearly stipulates the requirements for the limitation of harmful substances in the surface layer of synthetic materials to standardize the development of the construction industry for composite materials, and promote the health of the industry. It provides a safe and reliable sports environment for the majority of primary and middle school students in China.

So what are the harmful substances?

1. Soluble heavy metals (lead, cadmium, chromium, mercury)

2. Phthalate

3. Polycyclic aromatic hydrocarbons (PAHs)

4. SCCPs

5. 4,4'-Diamino-3,3'-dichlorodiphenylmethane (MOCA)

6. Isocyanate compounds