Formalinum

Aqueous Solution (35 per cent) of Formaldehyde Gas Is a powerful disinfectant and deodorant; a potent poison. Prevents growth and kills almost any pathogenic micro-organism. It seems to have the peculiar property of eating into malignant tumors, leaving the surrounding healthy tissue uncharred and unchanged. A plug of cotton wool soaked in a 20 per cent solution of Formaldehyde, and applied for a few hours, will produce a necrotic slough, which must be scraped away before the next application,