1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1].

533-73-3

C6H6O3

126.11

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years