HARD-WATER CHELATOR
Sodium Citrate
- hard-water chelator
Used with citric acid to hold the formula at a steady, slightly acidic pH. It also binds a little hard-water mineral.
- products in our library
- 349
- of researched products
- 5%
- on the label, in our shampoos
- usually #15
- most common in
- Shampoo
- in water
- Water-soluble
At a glance
Four things worth knowing about how this ingredient behaves on hair.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
The housekeeping this class does.
Where it sits on the labels we have, in the category it appears in most.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Job | Ties up hard-water minerals | 4 of 5 |
| Prominence | Secondary | 2 of 5 |
What it does for a formula
What Sodium Citrate does
The general function first, then how the role changes by product type where we have researched it.
The cuticle lies flatter on the acidic side; this is how a formula gets there.
Stops calcium and iron in tap water dulling a wash.
Water alone removes it, so it does not accumulate between washes.
Charge
Negatively charged, like the hair surface itself, so hair pushes it away instead of holding on to it. It rinses off easily, and most detergents carry this charge.
Solubility
Rinses out with water alone, so it does not build up on hair between washes.
Where it appears
Where it appears
One row per product category in our library: how many products list it, what share of that category that is, and where it typically sits on the label.
| Product type | How common | Typical position on label ? |
|---|---|---|
Shampoo
198 products
|
secondary · #15 | |
Conditioner
38 products
|
secondary · #16 | |
Mask / treatment
28 products
|
secondary · #20 | |
Scalp treatment
24 products
|
secondary · #23 | |
Leave-in
21 products
|
secondary · #25 | |
Heat protectant
9 products
|
secondary · #13 | |
Styler: mousse
7 products
|
secondary · #20 | |
Styler: curl cream
6 products
|
secondary · #28 | |
Styler: volumizer
5 products
|
secondary · #21 | |
Dry shampoo
3 products
|
secondary · #17 |
7 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: gel
3 products
|
secondary · #26 | |
Styler: smoothing cream
2 products
|
secondary · #28 | |
Finisher: oil
1 product
|
secondary · #16 | |
Finisher: serum
1 product
|
secondary · #16 | |
Styler: hairspray
1 product
|
secondary · #19 | |
Styler: lotion
1 product
|
secondary · #21 | |
Styler: refresh spray
1 product
|
secondary · #27 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Shampoo | 198 | 13% | 15 | 3 | secondary |
| Conditioner | 38 | 3% | 16 | 6 | secondary |
| Mask / treatment | 28 | 5% | 20 | 7 | secondary |
| Scalp treatment | 24 | 8% | 23 | 10 | secondary |
| Leave-in | 21 | 3% | 25 | 15 | secondary |
| Heat protectant | 9 | 4% | 13 | 6 | secondary |
| Styler: mousse | 7 | 3% | 20 | 13 | secondary |
| Styler: curl cream | 6 | 3% | 28 | 16 | secondary |
| Styler: volumizer | 5 | 3% | 21 | 6 | secondary |
| Dry shampoo | 3 | 2% | 17 | 17 | secondary |
| Styler: gel | 3 | 1% | 26 | 19 | secondary |
| Styler: smoothing cream | 2 | 2% | 28 | 24 | secondary |
| Finisher: oil | 1 | 0% | 16 | 16 | secondary |
| Finisher: serum | 1 | 1% | 16 | 16 | secondary |
| Styler: hairspray | 1 | 0% | 19 | 19 | secondary |
| Styler: lotion | 1 | 3% | 21 | 21 | secondary |
| Styler: refresh spray | 1 | 3% | 27 | 27 | secondary |
We have not researched differences by product type yet. The reading below comes from where it sits on the labels in our library.
Position footprint
Every listing in our library, by position on the label.
| Positions | Zone | Listings |
|---|---|---|
| 1-3 | Leading | 2 |
| 4-8 | Supporting | 63 |
| 9-15 | Secondary | 80 |
| 16-25 | Lower | 116 |
| 26+ | Trace | 88 |
How to read this
US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order.
So position tells you about relative amount only above that line, and we never convert a position into a percentage.
Who should pay attention
Formulation guidance for specific hair conditions, limited to the label positions where it applies. It is not a conclusion about any finished product, or about you.
Binds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.
Copper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.
pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.
Read from this ingredient’s chemical class. Where we have researched the ingredient itself, that reading replaces the class one.
Why it matters to shoppers
What seeing this ingredient tells you, what it does not, and the limits of our own method.
- a formula built for hard water
- a formula set to the acidity the cuticle prefers
- a rinse-clean feel
- a routine that does not build up
- an exact safety score (we do not publish one for any ingredient)
- how a finished product performs, which depends on the whole formula, not one line of it
- the exact percentage in a bottle, because label position never converts into a number
- a secondary pH adjuster, listed below the main ingredients in our shampoos
- it was on the printed ingredient list of every product we counted (we read labels, not marketing copy)
- that a product is right or wrong for you
We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
Commonly paired with
The ingredients that most often appear alongside this one in our library. We leave out the near-universal ones, because they pair with everything and tell you nothing.
- Sodium Chloride · 174
- Cocamidopropyl Betaine · 170
- Guar Hydroxypropyltrimonium Chloride · 101
- Polyquaternium-10 · 99
- Tetrasodium EDTA · 93
- Dimethicone · 86
- Tocopherol · 74
- Sodium Hydroxide · 73
- Behentrimonium Chloride · 73
- Sodium Xylenesulfonate · 71
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to keep the formula stable, clean and build foam, and improve feel after rinsing.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Head & Shoulders · Shampoo
Supreme Soothe & Strengthen Shampoo with Argan Oil and Rose Essence
#3 on the label · $0.84/oz
Pantene · Shampoo
Pro-V Daily Moisture Renewal Shampoo
#3 on the label · $0.64/oz
Pantene · Shampoo
Hair Volume Multiplier Shampoo with Bamboo
#4 on the label · $2.07/oz
Pantene · Shampoo
Pro-V Repair & Protect Shampoo
#4 on the label · $0.42/oz
Briogeo · Shampoo
Scalp Revival Dandruff Relief Shampoo with Charcoal + 3% Salicylic Acid
#5 on the label · $5.00/oz
Head & Shoulders · Shampoo
Supreme Nourish & Smooth Dandruff Scalp & Hair Shampoo
#5 on the label · $0.93/oz
Herbal Essences · Shampoo
Classic Clarifying Shampoo (Tea Tree)
#5 on the label · $0.38/oz
Pantene · Shampoo
New Lengths Root Stimulating Shampoo
#5 on the label · $1.23/oz
Pantene · Shampoo
Nutrient Blends Sulfate-Free Miracle Moisture Rose Water Shampoo
#5 on the label · $1.07/oz
Pantene · Shampoo
Pro-V Sheer Volume Shampoo
#5 on the label · $0.46/oz
Super Nature · Shampoo
Shampoo
#5 on the label · $0.67/oz
Aussie · Shampoo
Miracle Repairer Shampoo with Aloe
#6 on the label · $0.30/oz
See all 349 products in the library that list Sodium Citrate
Identity
What this entry is, and what our references call it.
Sodium Citrate
- CAS 68-04-2
- PubChem 6224
- pH adjuster
- sodium citrate
For your hair?
Whether Sodium Citrate matters for your hair depends on your hair.
the 8th most-listed chelator or pH adjuster in our libraryWhat this ingredient does, and where it sits on the labels we have researched.
A verdict on any product that contains it, and never a safety grade.
We do not physically test your hair. Everything above comes from the ingredient lists in our library and from published references. The consultation is what turns it into a plan.
References
Sourced Backed by a manufacturer or regulatory source.
This ingredient
- Manufacturer or regulatory PubChem : Compound identity: CID 6224, CAS 68-04-2, C6H5Na3O7 · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library: 349 of 6816 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are levels, not scores. Each one comes from what kind of ingredient it is (its chemical class, charge and solubility) or from where it sits on the labels we have.
- US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Position tells you about relative amount only above that line, and we never convert a position into a percentage.
- The prominence bands (leading, supporting, secondary) are the same ones the product pages use to read a single label, applied here to the median position across a category.
- We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
- Identifiers and references appear only when a published source is attached to this entry. Without one, we leave the row out rather than fill it in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-09-22. Product-page methodology: the product library.
