Is it safe to?Reviewed: 2025-12-27~1 min

Is it safe to use vinegar and baking soda together?

Short answer

⚠️Depends / use caution

It depends — small, open-air fizzing for demos or light deodorizing is fine, but avoid sealed spaces, large quantities, and don’t expect strong cleaning or unclogging.

Why people ask this

The combo is a popular internet hack for cleaning and unclogging drains, and people worry about pressure buildup, fumes, damage to surfaces, or whether mixing them cancels out their cleaning power.

When it might be safe

Small amounts mixed in an open container for a quick fizz (science demo or light deodorizing)
Sprinkling baking soda in a sink, then adding a little vinegar to foam and immediately rinsing
Brief, open-air use on non-stone surfaces followed by thorough water rinse

When it is not safe

Mixing in a sealed or covered container (pressure from CO2 can cause bursting)
Using large amounts in confined spaces like bottles, traps, or blocked drains where gas can’t vent
Combining during an appliance cycle (e.g., sealed dishwasher or washer compartments) where foaming/pressure can build
Using near or after bleach or ammonia cleaners (residues can create hazardous reactions with vinegar)
Applying on acid-sensitive stone (marble, travertine) where vinegar can etch the surface

Possible risks

Pressure buildup and container rupture from trapped CO2
Foam overflow leading to slips, mess, or splashes to eyes/skin
Etching or dulling of natural stone from vinegar’s acidity
Poor cleaning or unclogging because the mix largely neutralizes, reducing effectiveness

Safer alternatives

Use vinegar (diluted) alone for mineral deposits and soap scum on compatible surfaces
Use baking soda paste with water as a mild abrasive for greasy spots and deodorizing
For slow drains, try boiling water, dish soap, and a plunger or a drain snake
Use enzyme-based cleaners for organic build-up in drains
Choose a purpose-made cleaner (descaler, degreaser) per the surface and follow label directions

Bottom line

Mixing vinegar and baking soda is generally safe only in small, open-air uses where gas can vent, but it’s not an effective heavy-duty cleaner or drain opener. Never confine the reaction, avoid sensitive surfaces, and use targeted products or methods for real cleaning or clogs.