Et nyt studie har vist at ikke oxidative hårfarveprodukter indeholder hårfarver stoffer, som der normalt ikke testes med hos hudlægen.
I alt 289 forskellige produkter blev gennemgået. De blev købt i 5 forskellige europæiske lande og i alt blev 68 forskellige hårfarvestoffer identificeret – Se nedenstående tabel.
Forskerne fandt at disse 68 stoffer ikke er dækket af den nuværende allergitestserie og at man bør undersøge nærmere om denne skal ændres til også at inkludere nogle eller alle disse.
Link til artiklen – Pubmed.com
| NR | INCI name or other common ingredients glossary name | CI number | CAS no. |
| 1 | Basic Blue 99 | CI 56059 | 68123-13-7 |
| 2 | HC Blue No. 15 | – | 74578-10-2 |
| 3 | Basic Red 51 | – | 77061-58-6 |
| 4 | Acid Violet 43 | CI 60730 | 4430-18-6 |
| 5 | Basic Violet 2 | CI 42520 | 3248-91-7 |
| 6 | HC Yellow No. 4 | – | 59820-43-8 |
| 7 | Basic Orange 31 | – | 97404-02-9 |
| 8 | Basic Violet 16 | CI 48013 | 6359-45-1 |
| 9 | Basic Red 76 | CI 12245 | 68391-30-0 |
| 10 | Basic Brown 16 | CI 12250 | 26381-41-9 |
| 11 | Basic Brown 17 | CI 12251 | 68391-32-2 |
| 12 | Basic Yellow 57 | CI 12719 | 68391-31-1 |
| 13 | Acid Blue 9 | CI 42090 | 3844-45-9 |
| 14 | Acid Orange 7 | CI 15510 | 633-96-5 |
| 15 | Basic Yellow 87 | – | 68259-00-7 |
| 16 | HC Yellow No. 2 | – | 4926-55-0 |
| 17 | 3-Nitro-p-hydroxyethylaminophenol | – | 65235-31-6 |
| 18 | HC Blue No. 16 | – | 502453-61-4 |
| 19 | HC Blue No. 2 | – | 33229-34-4 |
| 20 | HC Red No. 3 | – | 2871-01-4 |
| 21 | 4-Hydroxypropylamino-3-nitrophenol | – | 92952-81-3 |
| 22 | Acid Yellow 3 | CI 47005 | 95193-83-2 |
| 23 | HC Red No. 10 | – | 95576-89-9 |
| 24 | HC Red No. 11 | – | 95576-92-4 |
| 25 | Basic Yellow 40 | – | 29556-33-0 |
| 26 | 2-Amino-6-chloro-4-nitrophenol | – | 6358-09-4 |
| 27 | HC Blue No. 12 | – | 132885-85-9/104516-93-0 |
| 28 | Hydroxyethyl-2-nitro-p-toluidine | – | 100418-33-5 |
| 29 | N,N0-Bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine | – | 84041-77-0 |
| 30 | Titanium dioxide | CI 77891 | 13463-67-7 |
| 31 | Acid Black 1 | CI 20470 | 1064-48-8 |
| 32 | Iron oxide blackb | CI 77499b | Several |
| 33 | Acid Red 52 | CI 45100 | 3520-42-1 |
| 34 | Disperse Violet 1 | CI 61100 | 128-95-0 |
| 35 | HC Yellow No. 13 | – | 10442-83-8 |
| 36 | Iron oxide redb | CI 77491b | Several |
| 37 | Iron oxide yellowb | CI 77492b | 51274-00-1 |
| 38 | HC Blue No. 11 | – | 23920-15-2 |
| 39 | 4-Amino-3-nitrophenol | – | 610-81-1 |
| 40 | Acid Red 33 | CI 17200 | 3567-66-6 |
| 41 | Basic Blue 9c | CI 52015 | 61-73-4 |
| 42 | 2-Hydroxyethyl picramic acid | – | 99610-72-7 |
| 43 | Acid Red 18 | CI 16255 | 2611-82-7 |
| 44 | Acid Yellow 23 | CI 19140 | 1934-21-0 |
| 45 | Basic Green 4c | CI 42000 | 569-64-2 |
| 46 | Basic Blue 3c | – | 47367-75-9/33203-82-6 |
| 47 | Hydroxyanthraquinone-aminopropyl methyl morpholinium methosulfate | – | 38866-20-5 |
| 48 | 2,6-Diamino-3-([pyridin-3-yl]azo)pyridine | – | 28365-08-4 |
| 49 | Acid Green 25 | CI 61570 | 4403-90-1 |
| 50 | Acid Red 92 | CI 45410 | 18472-87-2 |
| 51 | Basic Green 1c | CI 42040 | 633-03-4 |
| 52 | Carminesb | CI 75470b | 1390-65-4 |
| 53 | Ferric ferrocyanideb | CI 77510b | 14038-43-8/12240-15-2/25869-00-5 |
| 54 | HC Blue No. 17 | – | 16517-75-2 |
| 55 | Lazuriteb | CI 77007b | 12769-96-9/1302-83-6/57455-37-5 |
| 56 | 2-Chloro-6-ethylamino-4-nitrophenol | – | 131657-78-8 |
| 57 | Basic Blue 54d | – | 38901-83-6 |
| 58 | Basic Red 17e | – | |
| 59 | Basic Violet 4c | CI 42600 | 2390-59-2 |
| 60 | Basic Yellow 4e | – | |
| 61 | Chromium oxide greens | CI 77288 | 1308-38-9 |
| 62 | Curry Red | CI 16035 | 25956-17-6 |
| 63 | Disodium 6-hydroxy-5-([4-sulphonatophenyl]azo) naphthalene-2-sulfonateb | CI 15985b | 2783-94-0 |
| 64 | Disperse Blue 377 | – | 4471-41-4/67674-26-4/67701-36-4 |
| 65 | HC Orange No. 1 | – | 54381-08-7 |
| 66 | HC Red No. 13 | – | 94158-13-1 |
| 67 | HC Violet No. 2 | – | 104226-19-9 |
| 68 | Pigment Red 57 | CI 15850 | 5858-81-1 |