  Optical coherence tomography (OCT) is a label-free, non-invasive 3D imaging
tool widely used in both biological research and clinical diagnosis. Current
OCT modalities can only visualize specimen tomography without chemical
information. Here, we report a bondselective full-field OCT (BS-FF-OCT), in
which a pulsed mid-infrared laser is used to modulate the OCT signal through
the photothermal effect, achieving label-free bond-selective 3D sectioned
imaging of highly scattering samples. We first demonstrate BS-FF-OCT imaging of
1 {\mu}m PMMA beads embedded in agarose gel. Next, we then show 3D
hyperspectral imaging of polypropylene fiber mattress from a standard surgical
mask. We then demonstrate BS-FFOCT imaging on biological samples, including
cancer cell spheroids and C. elegans. Using an alternative pulse timing
configuration, we finally demonstrate the capability of BS-FF-OCT on a bulky
and highly scattering 150 {\mu}m thick mouse brain slice.
