Ingredient review
Disodium Tartrate
INCI: Disodium Tartrate
Disodium tartrate is a gentle pH adjuster and chelator that helps keep formulas stable and effective without irritating skin.
In plain English
Disodium tartrate is a salt derived from tartaric acid, a natural acid found in grapes. In skincare, it's used in tiny amounts to adjust the pH of a product so it's gentle on your skin, and to bind with trace metals in water that could spoil the formula or make it less effective. Think of it as a behind-the-scenes helper that keeps your cleanser, toner, or serum working as intended.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Disodium Tartrate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Disodium Tartrate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Disodium tartrate is the disodium salt of tartaric acid. It appears as a white crystalline powder and is water-soluble. In cosmetics, it functions primarily as a buffering agent (to maintain a stable pH) and a chelating agent (to bind metal ions that can degrade ingredients or cause discoloration).
How it works
As a pH adjuster, disodium tartrate helps bring a product's pH to a skin-friendly range (typically around 4.5–6.5). As a chelating agent, it grabs onto metal ions like iron or copper that may be present in water or raw materials, preventing them from catalyzing unwanted reactions that could change the product's color, smell, or texture. This helps extend the shelf life and preserve the formula's integrity.
Pros
Gentle pH balancer
Disodium tartrate adjusts pH without the sting or irritation that some acids can cause, making it ideal for sensitive skin formulations.
Formula protector
By chelating metal ions, it helps prevent discoloration, off-odors, and texture changes, so your product stays effective longer.
Cons and cautions
Not a star ingredient
Disodium tartrate is a behind-the-scenes helper, not a direct skin benefit ingredient. It won't hydrate, exfoliate, or brighten on its own.
Rare allergen potential
Though extremely uncommon, individuals with a specific allergy to tartaric acid derivatives could react. Patch testing is always wise for new products.
Best for
- Anyone using water-based skincare products who wants a stable, gentle formula
- People with sensitive skin who prefer low-irritation pH adjusters
Use caution if
- Those with known allergy to tartaric acid or its salts (extremely rare)
Usage tips
Safety summary
Disodium tartrate has a strong safety profile with very low irritation and sensitization potential. It is considered safe for use in rinse-off and leave-on products at concentrations up to 1% or more, though typical use is well below that. No significant health concerns have been identified in cosmetic use.
Research notes
Research on disodium tartrate in cosmetics is limited but consistent with its safe use as a pH adjuster and chelator. The Cosmetic Ingredient Review (CIR) panel reviewed tartaric acid and its salts, including disodium tartrate, and concluded they are safe in current cosmetic practices. No peer-reviewed studies indicate adverse effects at typical exposure levels.
Common label clues
- Typical concentration
- Typically used at 0.1% to 1%
- Regulatory status
- Approved for use in cosmetics by the FDA (as a generally recognized safe ingredient) and by the EU CosIng database. The CIR panel has deemed it safe at typical use levels.
- Common uses
- Cleansers, Toners, Serums, Moisturizers
- Environmental note
- Disodium tartrate is biodegradable and does not bioaccumulate, making it relatively eco-friendly compared to some synthetic chelators.
Good to know
- Disodium tartrate is considered safe by the Cosmetic Ingredient Review (CIR) panel at concentrations used in cosmetics.
- It is not the same as potassium bitartrate (cream of tartar) used in baking, though they are chemically related.
Common questions
What is Disodium Tartrate in beauty products?
Disodium tartrate is a salt derived from tartaric acid, a natural acid found in grapes. In skincare, it's used in tiny amounts to adjust the pH of a product so it's gentle on your skin, and to bind with trace metals in water that could spoil the formula or make it less effective. Think of it as a behind-the-scenes helper that keeps your cleanser, toner, or serum working as intended.
What does Disodium Tartrate do in a beauty product?
As a pH adjuster, disodium tartrate helps bring a product's pH to a skin-friendly range (typically around 4.5–6.5). As a chelating agent, it grabs onto metal ions like iron or copper that may be present in water or raw materials, preventing them from catalyzing unwanted reactions that could change the product's color, smell, or texture. This helps extend the shelf life and preserve the formula's integrity.
Is Disodium Tartrate safe for most people?
Disodium tartrate has a strong safety profile with very low irritation and sensitization potential. It is considered safe for use in rinse-off and leave-on products at concentrations up to 1% or more, though typical use is well below that. No significant health concerns have been identified in cosmetic use.
Who should be careful with Disodium Tartrate?
Those with known allergy to tartaric acid or its salts (extremely rare)
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.