No, I just want an anhydrous solution of formaldehyde (HCHO) in methanol. The commercial solution are roughly 40% formaldehyde, 15% methanol and 55% water, therefore I thought it would be better to start with a form of formaldehyde which is anhydrous from the beginning, like paraformaldehyde (its dehydrated polymer) or dimethoxymethane (CH3-O-CH2-O-CH3, its dimethyl acetal).