Can you mix baking soda and vinegar?
What actually happens
Sodium bicarbonate is a base and vinegar is an acid, so they neutralise each other. The fizz is carbon dioxide escaping, and what remains in the bowl is a dilute solution of sodium acetate — salt water. Baking soda cleans because it is a mild abrasive and a base that cuts grease; vinegar cleans because it is an acid that dissolves limescale. Combining them destroys both properties and produces a cleaner weaker than either.
How people end up doing it
It is the single most shared cleaning tip on the internet, and the visual drama of the fizz is doing all the persuading.
What to do instead
Use them separately for what each is good at: bicarbonate as a gentle scouring paste, vinegar on limescale and glass. The one place the reaction is genuinely useful is mechanical — the gas can shift a light drain blockage by agitation, not by cleaning.
Cleaning products
| Combination | Verdict | Why |
|---|---|---|
| Bleach and ammonia | Toxic gas | No. This is the classic household poisoning and it produces chloramine gas. |
| Bleach and vinegar | Toxic gas | No. Any acid plus bleach releases chlorine gas. |
| 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 baking soda and vinegar?
- You can, but it achieves nothing. Safe, dramatic, and it leaves you with salt water.
- What happens if you do?
- Sodium bicarbonate is a base and vinegar is an acid, so they neutralise each other. The fizz is carbon dioxide escaping, and what remains in the bowl is a dilute solution of sodium acetate — salt water. Baking soda cleans because it is a mild abrasive and a base that cuts grease; vinegar cleans because it is an acid that dissolves limescale. Combining them destroys both properties and produces a cleaner weaker than either.
- What should I do instead?
- Use them separately for what each is good at: bicarbonate as a gentle scouring paste, vinegar on limescale and glass. The one place the reaction is genuinely useful is mechanical — the gas can shift a light drain blockage by agitation, not by cleaning.
Related pages
- Bleach and ammonia No — this one produces a toxic gas
- Bleach and vinegar No — this one produces a toxic gas
- 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 vinegar Also produces a toxic gas
- Bleach and toilet cleaner Also produces a toxic gas
- Bleach and rubbing alcohol Also produces a toxic gas
- Hazard symbols What the pictogram on the bottle actually requires
Sources
- US Environmental Protection Agency — EPA (Public domain (US Government))