Dear Shahnawaz,

You are right; you can dissolve in hot water. See  the following properties for Apocynin:

Appearance: Crystalline powder

Physical State: Solid

Solubility: Soluble in ethanol (100 mM), chloroform, ether, hot water, benzene, ethyl acetate, and DMSO (100 mM). Insoluble in Petroleum ether.

Storage: Store at -20° C

Melting Point: 112-115 °C(lit.)

Boiling Point: 263-265 °C at 17 mmHg

Density: 1.16 g/cm3

Refractive Index: n20D 1.54

IC50: NADPH-oxidase: IC50 = 10 µM; Cytochrome b-245 light chain: IC50 = 61000 µM (human); Neutrophil cytosol factor 1: IC50 = 61000 µM (human)

pK Values: pKa: 8.18

Good luck

 yes thanks i did same ...

mashaallah, sir