Toni & Guy Strengthplex Bond Repair Hair Mask 285mL

Why it's rated this way

6 ingredients on this label are flagged. A cosmetic's rating is set by its most serious finding — here, Methylisothiazolinone.

1. MethylisothiazolinoneHigh concernPotent contact sensitizer; banned in EU leave-on cosmetics since 2017.

   What it is

   Its recorded role: preservative and antioxidant. About Methylisothiazolinone

   Why it's flagged

   Potent contact sensitizer; banned in EU leave-on cosmetics since 2017.

   Regulatory basis

   Greenveil's curated cosmetic-ingredient concern list.

   How sure we are

   High confidence. The label names this substance exactly.

2. MethylchloroisothiazolinoneHigh concernPotent contact sensitizer (MCI).

   What it is

   Its recorded role: preservative and antioxidant. About Methylchloroisothiazolinone

   Why it's flagged

   Potent contact sensitizer (MCI).

   Regulatory basis

   EU Cosmetics Regulation, Annex V — permitted preservative, with a concentration limit; Greenveil's curated cosmetic-ingredient concern list.

   How sure we are

   High confidence. The label names this substance exactly.

3. Paraffinum LiquidumMinor concernCosmetic-grade mineral oil (paraffinum liquidum) is a highly refined white oil. The EU prohibition covers untreated and mildly treated petroleum oils, not refined grades.

   What it is

   Its recorded role: emollient and occlusive. About Paraffinum Liquidum

   Why it's flagged

   Cosmetic-grade mineral oil (paraffinum liquidum) is a highly refined white oil. The EU prohibition covers untreated and mildly treated petroleum oils, not refined grades.

   Regulatory basis

   Greenveil's curated cosmetic-ingredient concern list. The listing applies only under conditions a label can't show (product type, concentration or use).

   How sure we are

   High confidence. The label names this substance exactly; whether the conditions apply depends on the product's formula.

4. Cetrimonium ChlorideMinor concernHair-conditioning quaternary ammonium. It irritates skin and eyes at high strength, so the EU caps it (other than as a preservative) at 2.5 % in rinse-off hair products, 1 % in leave-on hair products and 0.5 % in leave-on face products — the levels the SCCS found safe.

   What it is

   Its recorded role: preservative and antimicrobial. About Cetrimonium Chloride

   Why it's flagged

   Hair-conditioning quaternary ammonium. It irritates skin and eyes at high strength, so the EU caps it (other than as a preservative) at 2.5 % in rinse-off hair products, 1 % in leave-on hair products and 0.5 % in leave-on face products — the levels the SCCS found safe.

   Regulatory basis

   EU Cosmetics Regulation, Annex III — allowed only within set limits and conditions; Greenveil's curated cosmetic-ingredient concern list.

   How sure we are

   High confidence. The label names this substance exactly.

5. Behentrimonium ChlorideMinor concernHair-conditioning quaternary ammonium. It irritates skin and eyes at high strength, so the EU caps it (other than as a preservative) at 5 % in rinse-off hair products and 3 % in leave-on products — the levels the SCCS found safe.

   What it is

   Its recorded role: preservative and antimicrobial. About Behentrimonium Chloride

   Why it's flagged

   Hair-conditioning quaternary ammonium. It irritates skin and eyes at high strength, so the EU caps it (other than as a preservative) at 5 % in rinse-off hair products and 3 % in leave-on products — the levels the SCCS found safe.

   Regulatory basis

   EU Cosmetics Regulation, Annex III — allowed only within set limits and conditions; Greenveil's curated cosmetic-ingredient concern list.

   How sure we are

   High confidence. The label names this substance exactly.

6. PetrolatumMinor concernCosmetic-grade petrolatum is highly refined. The EU prohibits petrolatum only when its full refining history is not known and it cannot be shown to be free of carcinogenic impurities.

   What it is

   Its recorded role: uv absorber and moisturising. About Petrolatum

   Why it's flagged

   Cosmetic-grade petrolatum is highly refined. The EU prohibits petrolatum only when its full refining history is not known and it cannot be shown to be free of carcinogenic impurities.

   Regulatory basis

   EU Cosmetics Regulation, Annex II — substances prohibited in cosmetics; EU classification as carcinogenic, mutagenic or toxic to reproduction; Greenveil's curated cosmetic-ingredient concern list. The listing applies only under conditions a label can't show (product type, concentration or use).

   How sure we are

   High confidence. The label names this substance exactly; whether the conditions apply depends on the product's formula.

Assessed against the label as captured: 31 of 32 ingredients recognised.