Can you mix bleach and vinegar?
If the two have already been mixed: leave the room, open windows and doors from outside if you can reach them without breathing the air, and ring your national poison line. Do not go back in to neutralise it — adding a third chemical to a reaction in progress is the intuitive move and the wrong one, and most exposures happen to the person who returns to clear it up.
What actually happens
Bleach is stable because it is kept alkaline. Add an acid — vinegar, lemon juice, or any descaling or limescale-removing product — and it releases chlorine gas, which was used as a chemical weapon in the First World War and does the same thing in a kitchen. It attacks the airway immediately and the damage is not proportional to how bad it smells.
How people end up doing it
Most often through toilet and bathroom cleaners, which are frequently acidic and are frequently used in the same bowl as bleach. "Bleach the toilet then use the limescale remover" is the sequence that sends people to hospital.
What to do instead
Use one or the other and flush or rinse in between. If they have already mixed: leave, ventilate from outside, and ring the poison line.
Cleaning products
| Combination | Verdict | Why |
|---|---|---|
| Bleach and ammonia | Toxic gas | No. This is the classic household poisoning and it produces chloramine gas. |
| Baking soda and vinegar | Pointless | Safe, dramatic, and it leaves you with salt water. |
| Bleach and toilet cleaner | Toxic gas | No. Most toilet cleaners are acidic, so this is the bleach-and-acid reaction. |
| Bleach and rubbing alcohol | Toxic gas | No. It produces chloroform and other chlorinated compounds. |
| Hydrogen peroxide and vinegar | Do not | No — mixed in a bottle it forms peracetic acid, which is corrosive. |
| One drain cleaner and a different drain cleaner | Toxic gas | No. Drain cleaners come in strongly acidic and strongly caustic types, and combining them is violent. |
| Bleach and hydrogen peroxide | Do not | No — it is exothermic and destroys both, and can spray hot liquid. |
| Vinegar and castile soap | Pointless | Safe, and it curdles into a white mess that is worse than either. |
| Vinegar and ammonia | Pointless | Not dangerous, and they cancel each other out. |
Common questions
- Can you mix bleach and vinegar?
- No — this one produces a toxic gas. No. Any acid plus bleach releases chlorine gas.
- What happens if you do?
- Bleach is stable because it is kept alkaline. Add an acid — vinegar, lemon juice, or any descaling or limescale-removing product — and it releases chlorine gas, which was used as a chemical weapon in the First World War and does the same thing in a kitchen. It attacks the airway immediately and the damage is not proportional to how bad it smells.
- What should I do instead?
- Use one or the other and flush or rinse in between. If they have already mixed: leave, ventilate from outside, and ring the poison line.
- What if I have already mixed them?
- Leave the room, ventilate it from outside, and ring your national poison line. Do not go back in to neutralise it.
Related pages
- Bleach and ammonia No — this one produces a toxic gas
- Baking soda and vinegar You can, but it achieves nothing
- Bleach and toilet cleaner No — this one produces a toxic gas
- Bleach and rubbing alcohol No — this one produces a toxic gas
- Hydrogen peroxide and vinegar No — it damages something or fails
- One drain cleaner and a different drain cleaner No — this one produces a toxic gas
- Bleach and ammonia Also produces a toxic gas
- Bleach and toilet cleaner Also produces a toxic gas
- Bleach and rubbing alcohol Also produces a toxic gas
- One drain cleaner and a different drain cleaner Also produces a toxic gas
- Hazard symbols What the pictogram on the bottle actually requires
Sources
- What Noises Cause Hearing Loss? — Centers for Disease Control and Prevention (Public domain (US Government))
- Occupational Noise Exposure — Occupational Safety and Health Administration (Public domain (US Government))