Based on UK Timber Trade Association's definition, wood based structural panels are: plywood, particle board, OSB, MDF and cement bonded particle board (CBPB).

Only cement bonded particle board are used for highly fire resistant applications. In Europe and Canada, cement bonded particle board are allowed to use as elementary material as type I and type II structures.

Cement bonded particle board are used as sip skins in Europe. 

While CBPB showed excellent structural features, highly fire resistant, molds and termites resisitant, weather resistant and moisture resistant, the limitation is the size of the panel available. The standard size for most the fo the CBPB manufacturers in the world is 4'x10' or 4'x8', any thickness from 3/8" to 11/4".

I have seen companies in Europe use 24mm, almost 1" CBPB as SIP skin for heavy duty industrial appliations. 

In comparison to OSB,  in addition to the fire rate issue, CBPB is  more stable and much less maintenance which still structural sustainable.