Sandstone doesn't have a single scientific name. It's a rock type, not a specific mineral.

However, it's primarily composed of sand-sized particles, which are usually quartz grains.

Here's how you could describe sandstone scientifically:

* Lithified clastic sedimentary rock composed predominantly of quartz (SiO2) grains.

* Arenite is a more technical term for sandstone, specifically when it's composed of more than 90% quartz grains.

You could also describe it based on its specific characteristics:

* Arkosic sandstone if it contains a significant amount of feldspar.

* Graywacke if it contains a significant amount of rock fragments.

Ultimately, the "scientific name" depends on the specific type of sandstone and the level of detail you need.