Compoatlas

BASIC ORANGE 31

Official label name (INCI name, EU glossary of cosmetic ingredient names), No 3087

BASIC ORANGE 31: Allowed with restrictions, with limits depending on the product type (Annex III, entry 276), under Regulation (EC) No 1223/2009.

In plain words

What it is used for

Functions declared by manufacturers:

Hair dyeing: colours hair.

What the rules say

Allowed, with restrictions: Annex III sets a maximum concentration, the product types allowed and a warning to be printed on the packaging. Ingredient lists do not give quantities, so the concentration cannot be checked on the label; the warning can.

The text of the annexes

Allowed with restrictions

Entry
Annex III, No 276
Substance
2-[(4-Aminophenyl)azo]-1,3- dimethyl-1H-imidazolium chloride
Glossary names
BASIC ORANGE 31
CAS
97404-02-9
EC
306-764-4
Product type
(a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products
Maximum concentration
(b) 1,0 %
Warnings
(a) To be printed on the label: The mixing ratio. “ Hair colorants 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.”
Dates in the act (5)
  • Application from 11 July 2013
    It shall apply from 11 July 2013.
  • Entry into force on 11 July 2013
  • Entry into force on 27 November 2013
  • Application from 1 July 2014
    However, the following provisions in the Annex shall apply from 1 July 2014: (a) the provisions in column ‘i’ of point 1 and of points 3 to 9 relating to the use of the substances in products intended for colouring eyelashes; (b) points 2 and 10.
  • Entry into force on 1 July 2014

Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.

Identity

CosIng identifier
41527
CAS (according to CosIng)
97404-02-9
EC (according to CosIng)
306-764-4
Declared functions
Hair dyeing
Wikidata
Q27285211
ECHA InfoCard
100.097.013
InChIKey
KEVCVWPVGPWWOI-UHFFFAOYSA-N

Elsewhere in the world

Information on other jurisdictions. What is covered, and what is not yet.

United Kingdom (Great Britain)

  • Allowed with restrictions (Annex III)

Same entries as in the European Union. Conditions (concentrations, warnings) may differ: they are not compared here.

Switzerland

Regulation (EC) No 1223/2009 applies in Switzerland (Article 54 of the Ordinance on Foodstuffs and Utility Articles).

United States, federal rules

None of the integrated sections of the federal code (21 CFR 700.11 to 700.27 and 250.250) targets this name. The FDA does not publish a list of allowed ingredients.

South Korea

  • Allowed colorant: 염기성등색 31 호 (Basic Orange 31) (Basic Orange 31)

    색소 고시 별표 1 (allowed colorants), entry 110, page 6. Limit: 1%. Conditions (source text, in Korean): 염모용 화장품에만 사용 | ◎ 사용한도 1% | 비고: 타르색소

  • Restricted: 염기성등색31호 (Basic Orange 31)

    별표 2, 염모제 성분 (hair colorants), entry 36, page 20. Limit: 산화염모제에 0.5 %. Conditions (source text, in Korean): 비고: 그외 사용기준은 「화장품의 색소종류와 기준 및 시험방법」에 따름

Australia

  • Subject to conditions (threshold, labelling or packaging): BASIC ORANGE 31

    Poisons Standard, Schedule 6 (cosmetic entries), page 239. Thresholds cited: 1% or less. Conditions (source text): (2-[(4-aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride) except: | (a) in preparations for skin colouration and dyeing of eyelashes or eyebrows; or | (b) in hair dye preparations containing 1% or less of Basic Orange 31 when the immediate container and primary pack are labelled with the following statements: | (i) KEEP OUT OF REACH OF CHILDREN; | (ii) IF IN EYES WASH OUT IMMEDIATELY WITH WATER; and | (iii) WARNING – This product contains ingredients which may cause skin irritation to certain individuals. A preliminary test according to the accompanying directions should be made before use. This product must not be used for dyeing eyelashes or eyebrows; to do so may be injurious to the eye; | written in letters not less than 1.5 mm in height.

  • Prohibited for the stated use: BASIC ORANGE 31

    Poisons Standard, Schedule 10 (formerly Appendix C), page 313. Conditions (source text): (2-[(4-aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride) in preparations for skin colouration and dyeing of eyelashes or eyebrows.

Recorded cosmetics that contain it

1 recorded product list it, according to Open Beauty Facts contributors. Records are dated: the formula may have changed. See the list (page in French).

Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.