Section 21a-235-31 - Formaldehyde spray(a) If formaldehyde is applied with a spray, the standard U.S. Pharmacopoeia solution shall be diluted with three parts of water to one part of solution. This gives a ten per cent formaldehyde solution which is sufficient to kill all active germs which come in contact with the solution. (This ten per cent solution will not injure or fade fabrics.)(b) If formaldehyde solution is applied with a spray, the operator shall wear rubber gloves and a mask to protect hands and eyes against the irritating effects of this solution.Conn. Agencies Regs. § 21a-235-31