CAS number
CAS 1184721-10-5 2-chloro-4-[(1E)-(1-methyl-1H-pyrazol-5-…
CAS 1184721-10-5
Where CAS 1184721-10-5 appears: every table entry that prints it among its identifiers, in the newest version of each act this record holds, and every recorded change to those entries. Many entries name a group of substances and print no number, so absence here is not absence from the law. Not legal advice.
Where it appears now
Cosmetics Regulation Annex III, Reference number 385
Last changed in the version in force , by Regulation (EU) 2026/909, the act that change names · Annex III on this site
| Reference number | Substance identification | Restrictions | Wording of conditions of use and warnings | |||||
|---|---|---|---|---|---|---|---|---|
| Chemical name/INN | Name of Common Ingredients Glossary | CAS number | EC number | Product type, body parts | Maximum concentration in ready for use preparation | Other | ||
| a | b | c | d | e | f | g | h | i |
| 385 | 2-chloro-4-[(1E)-(1-methyl-1H-pyrazol-5-yl)diazenyl]-phenol | HC Yellow No 16 | 1184721-10-5 | - | (a) Hair dye substance in oxidative hair dye products | For (a): After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1 %. | For (a): To be printed on the label: The mixing ratio. Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary black henna tattoos may increase your risk of allergy. Do not colour your hair if: — you have a rash on your face or sensitive, irritated and damaged scalp, — you have ever experienced any reaction after colouring your hair, — you have experienced a reaction to a temporary black henna tattoo in the past | |
| (b) Hair dye substance in non-oxidative hair dye products | (b) 1,5 % | |||||||
Look up a number
Type a CAS or EC number, with or without its hyphens, or an Index No into the search box at the top of the page: it reads 50000 as CAS 50-00-0. Every number is also listed by act on the substances page.
Its history
· added · Cosmetics Regulation Annex III, Reference number 385
Recorded in the version in force , by Regulation (EU) 2026/909, the act that change names. The change on its version page
| Identifiers | Reference number | Substance identification | Restrictions | Wording of conditions of use and warnings | |||||
|---|---|---|---|---|---|---|---|---|---|
| Chemical name/INN | Name of Common Ingredients Glossary | CAS number | EC number | Product type, body parts | Maximum concentration in ready for use preparation | Other | |||
| a | b | c | d | e | f | g | h | i | |
| Reference number 385CAS 1184721-10-5 | 385 | 2-chloro-4-[(1E)-(1-methyl-1H-pyrazol-5-yl)diazenyl]-phenol | HC Yellow No 16 | 1184721-10-5 | - | (a) Hair dye substance in oxidative hair dye products | For (a): After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1 %. | For (a): To be printed on the label: The mixing ratio. Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary black henna tattoos may increase your risk of allergy. Do not colour your hair if: — you have a rash on your face or sensitive, irritated and damaged scalp, — you have ever experienced any reaction after colouring your hair, — you have experienced a reaction to a temporary black henna tattoo in the past | |
| (b) Hair dye substance in non-oxidative hair dye products | (b) 1,5 % | ||||||||
Sources
- Cosmetics Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02009R1223-20260518, in force 18 May 2026 (external, EUR-Lex)