Nécessaire · Rosemary Leave-In Mask
Three independent Greenlens lenses read the same 62 ingredients and land 42 points apart. That gap is not an error. Each lens asks a different question, and this page shows every answer, ingredient by ingredient, blended into nothing.
Our sources have reference data on all 62 listed ingredients. Our sources can only speak to ingredients they recognize — either flagged by an authority or known to be a common, well-characterized ingredient. An uncharacterized ingredient is a gap in our data, not a clean bill of health: a quiet safety scan over ingredients we can’t place is a weaker signal than one over ingredients we can.
Independent
The regulatory baseline. Follows EU cosmetic law: prohibited and restricted ingredients cost points, and allergen labelling is capped so it cannot tank a score on its own.
Flagged 19 of 62 ingredients: 2 restricted, 1 of concern, 14 regulated allergens.
Independent
The strict lens. Flags any ingredient with a listed hazard trait (SIN List, IARC, Prop 65), even when regulators still permit it.
Flagged 1 of 62 ingredients on hazard grounds: 1 mild sensitizer.
Independent
The lenient lens. Trusts dose and regulation: permitted ingredients kept within their legal caps are tolerated, and only genuinely prohibited substances take a big hit.
Flagged 2 of 62 ingredients: 2 restricted (within-limit).
These lenses disagree. A split of 42 points crosses our disagreement threshold (20). We keep every verdict and never average them; the table below is where the split comes from.
| Ingredient | Scan | Precautionary | Tolerance |
|---|---|---|---|
| BEHENTRIMONIUM CHLORIDE (1)EU Cosmetics Regulation Annex III (restricted) | −10restricted | · | −6restricted |
| CETRIMONIUM CHLORIDE (1) / STRARTRIMONIUM CHLORIDE (1)EU Cosmetics Regulation Annex III (restricted) | −10restricted |
Coverage & match quality
2 ratings · 1 of 4 axes
The overall ring on the product page is the weighted mean of the four pillars using your weights, computed fresh on every visit and never stored. How each lens's reference lists were built, penalty by penalty, is on the methodology page.
← Back to Rosemary Leave-In Mask| · |
| −6restricted |
| Fragrance / Parfum (undisclosed)Common transparency/sensitization concern (not a regulatory ban) | −12concern | · | noted, 0concern |
| Alpha-Isomethyl IononeEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Citrus Aurantium Bergamia Peel OilEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| Juniperus Virginiana OilEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| SclareolEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | −3allergen | · | noted, 0allergen |
| PhenoxyethanolEU Cosmetics Regulation Annex V (preservative, with limits) | noted, 0permitted | −2mild_sensitizer | noted, 0permitted |
| Alpha-TerpineneEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Beta-CaryophylleneEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| CamphorEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Distillates (petroleum), hydrotreated middle, except if the full refining history is known and it can be shown that the substance from which it is produced is not a carcinogenEU Cosmetics Regulation Annex II (prohibited) | noted, 0permitted | · | noted, 0permitted |
| LimoneneEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| LinaloolEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Linalyl AcetateEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| PineneEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| TerpineolEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| TerpinoleneEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
| Tetramethyl acetyloctahydronaphthalenesEU Cosmetics Regulation Annex III / Reg. (EU) 2023/1545 (labelled fragrance allergen) | noted, 0allergen | · | noted, 0allergen |
−N points subtracted by that lens, labelled with its concern · noted, 0 seen but tolerated under that philosophy · · not on that lens's reference lists. Open an ingredient for the full reasoning and every rater's position. 43 other ingredients matched no list at all.