What it is
In the register’s words: “Styrax Tonkinensis Resin Extract is the extract of the resin of Styrax tonkinensis.”
- EU register name (INCI)
- STYRAX TONKINENSIS RESIN EXTRACT
- CAS number
- 9000-72-0 / 84012-39-5
- EC number
- 232-556-7 / 281-683-4
Labels often add a second name in brackets, so a label may say Styrax Tonkinensis (Benzoin) Resin Extract where the register says STYRAX TONKINENSIS RESIN EXTRACT. Both are the same ingredient.
What the register lists it for
These are the uses the European Commission’s CosIng register lists for Styrax Tonkinensis (Benzoin) Resin Extract in any cosmetic, hair roles first. They say why a maker might add it, not what it does in one formula, and they aren’t a safety rating.
- Skin conditioning
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A register role for ingredients that help dry or rough skin feel supple again.
Register definition: “Enhancing the appearance of dry and/or damaged skin by reducing flaking and restoring suppleness.”
Where it sits on each label
US labels list ingredients from most to least, except that those at 1% or less may follow in any order. A name near the top is a large part of the formula. A label doesn’t mark where the 1% point falls, so further down, the order says little about how much is in it.
- Shampoos 1 label First five names: 0 of 1 Shampoos without it
- Rinse-out conditioners 1 label First five names: 0 of 1 Rinse-out conditioners without it
- Deep conditioners 1 label First five names: 0 of 1 Deep conditioners without it
- Leave-in conditioners 1 label First five names: 0 of 1 Leave-in conditioners without it
- Stylers 2 labels First five names: 0 of 2 Stylers without it
- Heat protectants 1 label First five names: 0 of 1 Heat protectants without it
- Hair oils 1 label First five names: 0 of 1 Hair oils without it
Every label, product by product (8)
- Bouclème Curl Cleanser Shampoo · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 30th of 35 names
- Bouclème Curl Conditioner Rinse-out conditioner · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 21st of 38 names
- Bouclème Intensive Moisture Treatment Deep conditioner · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 25th of 50 names
- Bouclème Curl Cream Leave-in conditioner · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 26th of 38 names
- Bouclème Super Hold Styler Styler · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 16th of 48 names
- Bouclème Curl Defining Gel Styler 23rd of 31 names
- Bouclème Curl Defence Spray Heat protectant · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 22nd of 35 names
- Bouclème Revive 5 Hair Oil Hair oil · listed as *Styrax Tonkinensis (Benzoin) Resin Extract 12th of 31 names
Each line runs from the first name on a label to the last; a dot is where this ingredient sits. Makers change formulas now and then; if the list on your bottle differs, go by your bottle.
Your next step
Other skin conditioning ingredients on these labels
- Lactobacillus/Honey/Keratin Ferment 7 labels
- Vaccinium Myrtillus Fruit Extract 3 labels
Updated · The name, numbers and uses come from the European Commission’s CosIng entry (CC BY 4.0); we write the uses in US spelling and put the hair ones first. The labels are each maker’s own. The order rule is the FDA’s Cosmetics Labeling Guide. All our sources are on the Sources page.