Contrast-matching small-angle neutron scattering (CM-SANS) can decouple closed porosity from open porosity in materials. This technique has been applied to Pittsburgh No. 8 coal char, which is known to be nonporous. It is shown that there is broad agreement between CM-SANS and gas adsorption techniques. Scattering in the CM samples was due to ash and internal fluctuations in the neutron scattering density and contributed 5% to the total scattering in dry samples.