SOLVENT
Undecane
- solvent
A light plant-derived hydrocarbon that spreads other ingredients and evaporates.
- products in our library
- 15
- of researched products
- 0.4%
- on the label, in our hair oils
- usually #6
- most common in
- Finisher: oil
- in water
- Volatile
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.
How fast it leaves after the product is applied.
What is still on the hair once it has evaporated.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | None left behind | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Drying speed | Steady | 2 of 5 |
| Residue | None | 1 of 5 |
What it does for a formula
What Undecane does
The general function first, then how the role changes by product type where we have researched it.
What everything else is dissolved in before it reaches your hair.
Smooths the feel of the strand without adding hold or cleaning.
It carries the formula onto the hair and then leaves.
Charge
Charge is not recorded for this ingredient.
Solubility
Evaporates after application rather than staying on the hair, so it leaves nothing behind to remove.
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 ? |
|---|---|---|
Finisher: oil
3 products
|
supporting · #6 | |
Mask / treatment
3 products
|
secondary · #24 | |
Conditioner
2 products
|
secondary · #16 | |
Finisher: shine spray
2 products
|
supporting · #6 | |
Shampoo
2 products
|
secondary · #24 | |
Finisher: serum
1 product
|
supporting · #8 | |
Heat protectant
1 product
|
secondary · #12 | |
Styler: hairspray
1 product
|
supporting · #5 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Finisher: oil | 3 | 2% | 6 | 4 | supporting |
| Mask / treatment | 3 | 1% | 24 | 23 | secondary |
| Conditioner | 2 | 0% | 16 | 8 | secondary |
| Finisher: shine spray | 2 | 3% | 6 | 5 | supporting |
| Shampoo | 2 | 0% | 24 | 24 | secondary |
| Finisher: serum | 1 | 1% | 8 | 8 | supporting |
| Heat protectant | 1 | 1% | 12 | 12 | secondary |
| Styler: hairspray | 1 | 1% | 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 | 0 |
| 4-8 | Supporting | 9 |
| 9-15 | Secondary | 3 |
| 16-25 | Lower | 6 |
| 26+ | Trace | 0 |
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.
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
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.
- a light, fast-drying formula
- a softer feel
- nothing left on the hair
- less frizz and easier combing
- 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 solvent alongside the main ingredients in our hair oils
- it was on the label of every product we counted — we read printed ingredient lists, not marketing copy
- it is a carrier, not something left on the 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.
- Tridecane · 14
- Simmondsia Chinensis (Jojoba) Seed Oil · 9
- Polycitronellol Acetate · 8
- Ricinus Communis (Castor) Seed Oil · 8
- Helianthus Annuus (Sunflower) Seed Oil · 8
- Crambe Abyssinica Seed Oil · 7
- Caprylic/Capric Triglyceride · 7
- Squalane · 6
- Benzoic Acid · 6
- Butylene Glycol · 6
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to carry the formula and let it dry, add grip, and give the formula body and hold.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Not Your Mother's · Finisher
Curl Talk Strengthening Hair Oil
#4 on the label · $3.33/oz
OGX · Mask / treatment
Mirror Shine + Argan Oil Smoothing Pre-Wash Hair Gloss
#4 on the label · $2.50/oz
IGK · Finisher
Club Lights Clear Gloss Style Perfector
#5 on the label · $11.20/oz
It's A 10 · Finisher
Clear Miracle Shine Elixir
#5 on the label · $9.41/oz
Moroccanoil · Styler
Luminous Hairspray Extra Strong
#5 on the label · $2.68/oz
Drybar · Finisher
Sparkling Soda Shine Mist & UV Shield
#6 on the label · $7.56/oz
K18 · Finisher
Molecular Repair Oil
#6 on the label · $64.10/oz
Innersense Organic Beauty · Finisher
Overnight Repair Serum
#8 on the label · $10.50/oz
Virtue Labs · Conditioner
Curl Conditioner
#8 on the label · $7.78/oz
Curlsmith · Heat protectant
Curlshield Cream
#12 on the label
IGK · Styler
Turn It Up Hair Thickening Instant Volume Spray
#14 on the label
Sun Bum · Finisher
Revitalizing Protect & Repair Oil
#14 on the label · $9.99/oz
Identity
What this entry is, and what our references call it.
No public-domain structure depiction is available for this entry.
Undecane
- emollient
- undecane
For your hair?
Whether Undecane matters for your hair depends on your hair.
15 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 — 15 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.