Quartz is not listed by the manufacturer, and this solvent-containing degreaser's compatibility with quartz resins, sealers, or finishes is not established by the provided evidence.
Why
The product is approved for several hard surfaces, but quartz is a composite material and the evidence does not confirm suitability for it. Unknown broader chemistry and absent use instructions leave a realistic risk of dulling or affecting the finish.
What to do
Do not use broadly unless the quartz manufacturer or product label confirms compatibility. If testing is necessary, spot-test an inconspicuous area, use briefly, and rinse thoroughly.
pH
Not stated in the provided manufacturer evidence.
Relevant chemistry
The evidence identifies d-limonene for the cleaner family; no numeric pH or broader chemistry classification is provided.
Source: official product page ↗