Sodium Bicarbonate

Benefits
Antiseptic

What is Sodium Bicarbonate?

Sodium bicarbonate, chemically NaHCO3 and known as baking soda, is an inorganic compound derived from natural mineral sources or synthesized via industrial processes like the Solvay method. In cosmetic formulations, it appears in cleansers, scrubs, masks, deodorants, and oral care items. It works as a fine powder for mechanical exfoliation by buffing away surface debris, as an alkaline agent to raise pH levels for optimal ingredient activity and stability, and as a neutralizer that reacts with acidic compounds to reduce odors. Its mildly basic nature disrupts microbial growth on skin surfaces, supporting cleanliness in washes and deodorants. Common in rinse-off products, it enhances texture and freshness without residue when properly formulated.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Abrasive
Provides gentle mechanical exfoliation and polishing, helping remove surface dead skin cells and improve smoothness and slip in scrubs and cleansers.
Buffering agent
Maintains the pH stability of a formulation.
Deodorant agent
Targets malodor by neutralizing odor molecules, inhibiting odor-causing microbes, or adding fragrance notes to improve underarm and body freshness.
Oral care agent
Supports oral hygiene performance (cleaning, freshening, plaque control, sensitivity support) in toothpaste, mouthwash, and related products.
Oral health care drug
A regulated active used in oral products to treat or help prevent a specific condition (e.g., caries, gingivitis), subject to local OTC drug rules.
PH adjuster
Raises or lowers pH to the target range, supporting ingredient performance, preservative efficacy, stability, and user comfort.
Skin protecting
Forms a barrier to protect skin from external irritants.
Deodorant
Helps control body odor by reducing odor-causing bacteria and/or neutralizing or masking malodor, without necessarily reducing sweat production.

Benefits

Provides gentle physical exfoliation to smooth skin texture.

Stabilizes product pH for better performance and comfort.

Neutralizes odors for effective deodorizing action.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals seeking mild, natural exfoliation in scrubs.
Those with highly sensitive or compromised skin barriers.
Users wanting pH-balanced cleansers for daily routines.
Individuals prone to dryness from alkaline ingredients.
People using deodorants for body odor management.
Users with abrasives sensitivity in facial products.

Safety Notes

  • Rated low hazard by safety assessments for cosmetic use.
  • Typically non-comedogenic and suitable in low concentrations.

Frequently Asked Questions about Sodium Bicarbonate

Is sodium bicarbonate comedogenic?

No, it has a comedogenic rating of 0, unlikely to clog pores.

Can it irritate skin?

Generally low irritation potential, but patch test for sensitivity.

What products commonly contain it?

Found in scrubs, cleansers, deodorants, and oral care formulas.