Interesting question! The equilibrium constant for this reaction is around 2 at 20°C:
Dul’neva, L. & Moskvin, A.. (2005). Kinetics of Formation of Peroxyacetic Acid. Russian Journal of General Chemistry. 75. 1125-1130. 10.1007/s11176-005-0378-8.
If [H2O2] = 0.44 M and [acetic acid] = 0.42 M and [H2O] = 55 M, then [peracetic acid] = 0.0065 M at equilibrium
which is just enough peracetic acid to provide some extra antiseptic activity. It’s also enough to be irritating but I doubt it’s a serious hazard. Perhaps others are more familiar with this hazard?
These authors also report the enthalpy of reaction as -14 kJ/mol, which allows one to calculate the enthalpy of formation of peracetic acid as -400 kJ/mol.
That is a common mixture for intentional biocidal cleaning. At those already diluted concentrations, there should be no particular harmful effect. BUT, just as with the vinegar and peroxide (in particular) you should always take care to avoid prolonged exposure. But as a cleaning mixture, it will remain as stable as the peroxide itself and poses no danger of explosion or corrosive action in the container. A site with some good usage cautions - again, mostly for concentrated solutions. Peracetic Acid Uses and Hazards
P.S. I also made my own formulation of 3% hydrogen peroxide and 70%propyl alcohol (50/50) as a great deodorizing cleaning spray for dogs urinating were you don't want them, and particularly for cleaning rugs and fabrics.
I'm not a doctor, but I can provide some general information about the chemicals you've been using for Pressure Cleaning Norwich.
Mixing hydrogen peroxide (H2O2) and vinegar (which contains acetic acid, CH3COOH) together can potentially produce peracetic acid (CH3COOOH), especially in higher concentrations. Peracetic acid can be harmful to the eyes, skin, and respiratory system if exposed to it in significant amounts. However, in your case, where you've been using a 50/50 mixture of 3% hydrogen peroxide and 5% white vinegar, the concentration of peracetic acid produced is likely to be relatively low.
The symptoms you've experienced, such as eye and throat discomfort, may indeed be due to the fumes from the mixture. While the symptoms have not lingered, it's essential to exercise caution when using cleaning products and ensure proper ventilation in the area where you are cleaning.
To minimize any potential risks:
Use the cleaning mixture in a well-ventilated area or open a window to allow fresh air circulation.
Wear protective gear like gloves and goggles to protect your skin and eyes from contact with the cleaning solution.
Avoid prolonged exposure to the fumes and ensure that the area is adequately ventilated.
If you experience any persistent or severe symptoms, such as skin irritation or breathing difficulties, seek medical attention.
Consider using alternative cleaning products or commercial cleaning solutions that are specifically designed for the task at hand and may have fewer risks associated with them.
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Really, really don't worry about it. Just keep it out of your eyes and don't inhale it. See if you can use a lower [H2O2] for antisepsis. Have you thought of using glutaraldehyde ?
Given that you've been using this mixture for an extended period, it's understandable to have concerns about potential health effects, especially since you're in your third trimester of pregnancy. While you haven't experienced skin burns, any discomfort, especially during pregnancy, should be taken seriously.
It might be a good idea to stop using this mixture for cleaning, particularly during your pregnancy, to minimize any potential risks. Explore alternative, pregnancy-safe cleaning products or natural cleaning solutions that are less likely to produce irritating fumes.
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