FILM FORMER
Hydroxypropyl Starch Phosphate
- film former
A modified starch that thickens and leaves a light, powdery film — often used for body in curl products.
- products in our library
- 67
- of researched products
- 2%
- on the label, in our conditioners
- usually #5
- most common in
- Conditioner
- in water
- Water-soluble
At a glance
Four named levels, read from this ingredient’s chemical class, its charge, its solubility, or where it sits on the labels we have. More dots means more of the property named — never “better”.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
What the polymer class can do, not what any bottle claims.
How well the film survives damp air, as a class.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Hold | Soft | 3 of 5 |
| Humidity resistance | Low | 1 of 5 |
What it does for a formula
What Hydroxypropyl Starch Phosphate does
The general function first, then how the role changes by product type where we have researched it.
A dry powder that takes up oil and leaves texture behind.
The film is what holds a shape once the water has gone.
How firmly depends on the polymer class and how much of it is used.
Texture in the hand — it says nothing about what reaches the hair.
Charge
Charge is not recorded for this ingredient.
Solubility
Rinses out with water alone — it does not accumulate 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 ? |
|---|---|---|
Conditioner
17 products
|
supporting · #5 | |
Mask / treatment
15 products
|
supporting · #4 | |
Styler: curl cream
10 products
|
supporting · #6 | |
Co-wash
9 products
|
supporting · #4 | |
Leave-in
6 products
|
secondary · #17 | |
Styler: gel
3 products
|
supporting · #4 | |
Shampoo
2 products
|
secondary · #14 | |
Styler: mousse
2 products
|
secondary · #14 | |
Heat protectant
1 product
|
secondary · #12 | |
Styler: refresh spray
1 product
|
secondary · #14 |
1 more product type
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: smoothing cream
1 product
|
supporting · #5 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 17 | 2% | 5 | 2 | supporting |
| Mask / treatment | 15 | 4% | 4 | 2 | supporting |
| Styler: curl cream | 10 | 10% | 6 | 2 | supporting |
| Co-wash | 9 | 9% | 4 | 3 | supporting |
| Leave-in | 6 | 1% | 17 | 3 | secondary |
| Styler: gel | 3 | 2% | 4 | 3 | supporting |
| Shampoo | 2 | 0% | 14 | 6 | secondary |
| Styler: mousse | 2 | 1% | 14 | 14 | secondary |
| Heat protectant | 1 | 1% | 12 | 12 | secondary |
| Styler: refresh spray | 1 | 8% | 14 | 14 | secondary |
| Styler: smoothing cream | 1 | 2% | 5 | 5 | supporting |
No product-type differences have been researched yet — the reading below is computed 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 | 18 |
| 4-8 | Supporting | 34 |
| 9-15 | Secondary | 14 |
| 16-25 | Lower | 8 |
| 26+ | Trace | 3 |
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
Conditional formulation guidance, scoped to a hair condition and to the positions where it is meaningful. It is not a conclusion about any finished product, and not a conclusion about you.
Adds grip and body with no oil attached, which is what lifts fine hair at the root instead of weighing it down.
How rigid the finish is depends on which polymer it is and what the formula pairs with it, not on there being one.
Starch gives texture and grip rather than a set film; firm hold usually needs a polymer alongside it.
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 this ingredient is evidence of, what it is not evidence of, and what our own method can and cannot tell you.
- dry texture without oil
- a style that holds
- a thicker, easier-to-spread formula
- a rinse-clean feel
- an exact safety score — we do not publish one, for any ingredient
- how a finished product performs by itself — that is the whole formula, not one line of it
- the exact percentage in a bottle — label position never converts into a number
- a supporting powder alongside the main ingredients in our conditioners
- it was on the label of every product we counted — we read printed ingredient lists, not marketing copy
- anything about what the product does on hair
- 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
Ingredients that appear alongside this one most often in our library. Near-universal ingredients are excluded — they pair with everything and tell you nothing.
- Behentrimonium Chloride · 37
- Isopropyl Alcohol · 34
- Cetrimonium Chloride · 27
- Tocopherol · 26
- Cocos Nucifera (Coconut) Oil · 24
- Sodium Hydroxide · 21
- Guar Hydroxypropyltrimonium Chloride · 21
- Propylene Glycol · 20
- Helianthus Annuus (Sunflower) Seed Oil · 18
- Caprylyl Glycol · 18
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to improve feel after rinsing, carry the formula and let it dry, and deliver a stated effect.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
AG Care · Styler
Curl Fresh Definer Silicone-Free Soft Hold Styling Cream
#2 on the label · $5.00/oz
AG Care · Styler
Re:Coil Curl Activator - 6.0 oz
#2 on the label · $4.67/oz
Biolage · Mask / treatment
Color Last Deep Treatment Pack Hair Mask
#2 on the label · $5.15/oz
Biolage · Mask / treatment
Full Rescue Restorative Mask
#2 on the label · $2.71/oz
Kerastase · Mask / treatment
Densifique Masque Densite
#2 on the label · $8.51/oz
Kerastase · Mask / treatment
Specifique Masque Rehydratant
#2 on the label
Klorane · Conditioner
Klorane Strength Fortifying & Revitalizing Conditioner
#2 on the label · $3.73/oz
amika · Styler
Curl Corps Enhancing Gel
#3 on the label · $4.48/oz
Bumble and bumble · Leave-in
Don't Blow It Fine Air-Dry Hair Cream
#3 on the label · $7.40/oz
Creme of Nature · Co-wash
Argan Oil Creamy Hydration Co-Wash Cleansing Conditioner
#3 on the label · $0.53/oz
Curlsmith · Co-wash
Curl Quenching Cleansing Conditioning Wash
#3 on the label · $2.17/oz
Curlsmith · Co-wash
Curl Quenching Conditioning Co-Wash
#3 on the label · $2.17/oz
See all 67 products in the library that list Hydroxypropyl Starch Phosphate
Identity
What this entry is, and what our references call it.
No public-domain structure depiction is available for this entry.
Hydroxypropyl Starch Phosphate
- starch
- thickener
- hydroxypropyl starch phosphate
For your hair?
Whether Hydroxypropyl Starch Phosphate matters for your hair depends on your hair.
67 products in our library list itWhat 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 is read from the ingredient lists in our library and from published references — the consultation is what turns it into a plan.
References
Seed entry — sourcing in progress Written from our reference work; primary sourcing is still being attached.
No published source is attached to this entry yet.
How this page was made
- Every number above is counted from the ingredient lists in our own product library — 67 of 3889 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are named levels read from an ingredient’s chemical class, charge, solubility, or where it sits on the labels we have — never a score.
- 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; where none is, the row is simply absent rather than filled in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-08-28. Product-page methodology: the product library.