BASIC ORANGE 31

RestrictedCAS 97404-02-918 regulations across 17 markets

BASIC ORANGE 31 is a cosmetic ingredient classified as Hair Dyeing. Also known as CAS 97404-02-9. It is regulated in 17 markets including UAE, Australia, Bahrain.

Also Known As

CAS Number: 97404-02-9

Market Overview — 29 Markets

European Union1

United Kingdom2

United States

California

Maryland

Washington

Canada

Brazil

South Korea1

Japan

Taiwan1

Australia1

Singapore1

Malaysia1

Thailand1

Indonesia1

Vietnam1

Philippines1

UAE1

Saudi Arabia1

Qatar1

Oman1

Kuwait1

Bahrain1

Russia

Belarus

Kazakhstan

Armenia

Kyrgyzstan

Detailed Regulations

Europe3 regulations

European UnionRestrictedAnnex III #276

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl-1H-imidazolium chloride
CAS: 97404-02-9
Max concentration: (b) 1,0 %
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products
Conditions of use: (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.”

Source: EC 1223/2009 Annex III

United KingdomRestrictedAnnex III #276

Chemical name: 2-[(4-Aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride
CAS: 97404-02-9
Product type: (a) Hair dye substance in oxidative hair dye products
Conditions of use: (a) To be printed on the label: The mixing ratio. 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. Hair colorants can cause severe allergic reactions.
Other conditions: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0,5 %

Source: UK retained EC 1223/2009 Annex III

United KingdomRestrictedAnnex III #276

Chemical name: 2-[(4-Aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride
CAS: 97404-02-9
Max concentration: (b) 1,0 %
Product type: (b) Hair dye substance in non-oxidative hair dye products
Conditions of use: Max: (b) 1,0 %

Source: UK retained EC 1223/2009 Annex III

AmericasNo restrictions

No specific restrictions for BASIC ORANGE 31 in United States, California, Maryland, Washington, Canada, Brazil.

East Asia & Oceania3 regulations

South KoreaRestrictedAnnex restricted #M1059

Chemical name: Basic Orange 31
Conditions of use: * 배합한도 : <색소> ∙ 1% ∙ 염모용 화장품에만 사용 <염모제> ∙ 산화염모제에 0.5 % ∙ 그 외 사용기준은 ｢화장품의 색소종류와 기준 및 시험방법｣에 따름

Source: MFDS Korea Cosmetics Regulation

TaiwanRestrictedAnnex Restricted Ingredients List #122

Chemical name: 2-[(4-Aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride
CAS: 97404-02-9
Max concentration: (a)0.5% (b)1%
Product type: (a)Oxidative hair dye products (b)Non-oxidative hair dye products

Source: TFDA Cosmetics Regulations

AustraliaRestrictedAnnex Schedule 6 (Poison) #SUSMP Schedule 6

Chemical name: BASIC ORANGE 31 (2-[(4-aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride)
Conditions of use: 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 direc...

Source: TGA SUSMP F2026L00060

ASEAN6 regulations

SingaporeRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

MalaysiaRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

ThailandRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

IndonesiaRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

VietnamRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

PhilippinesRestrictedAnnex ACD Annex III (Restricted) #300

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl- 1H-imidazolium chloride / Basic Orange 31
CAS: 97404-02-9
Max concentration: (b) 1.0%
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
Conditions of use: (a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.5% (a) and (b): The direction for use 'wear suitable gloves' must be included in label or leaflet text. | Label: (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. (a) and (b) Do not use to dye eyelashes or eyebrows

Source: ASEAN Cosmetic Directive (HSA Dec 2025)

GCC6 regulations

UAERestrictedAnnex III #276

Chemical name: 2-[(4-Aminophenyl)azo]-1,3- dimethyl-1H-imidazolium chloride
CAS: 97404-02-9
Max concentration: (b) 1,0 %
Product type: (a) Hair dye substance in oxidative hair dye products (b) Hair dye substance in non-oxidative hair dye products
Conditions of use: (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.”