The density of phenol formaldehyde resin (also known as Bakelite) varies depending on the specific formulation and curing conditions. However, a typical range for the density of phenol formaldehyde resin is 1.25 to 1.45 g/cm³.

Here are some factors that can influence the density:

* Filler content: The addition of fillers, such as wood flour, can reduce the density of the resin.

* Curing temperature and pressure: Higher curing temperatures and pressures generally lead to a denser resin.

* Type of formaldehyde and phenol used: Different ratios and types of formaldehyde and phenol can affect the final density.

For a more precise density value, it's important to consult the specific product datasheet or technical specifications provided by the manufacturer.