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p-Methylaminophenol and its sulphate p-Methylaminophenol p-Methylaminophenol sulphate CAS No 150-75-4/ 55-55-0 / 1936-57-8

ASEAN Annex III lists this record among substances allowed only under restrictions and conditions. Member-state transition rules and deviations still require local verification.

All ASEAN recordsCompare all marketsOpen official source

Regulatory decision and full conditions

Status
Restricted
Legal role
Binding rule
Regulatory summary
ASEAN Annex III lists this record among substances allowed only under restrictions and conditions. Member-state transition rules and deviations still require local verification.
Conditions and restrictions
Hair dye substance in oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted. · After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 0.68 % (as sulphate) • Do not use with nitrosating agents • Maximum nitrosamine content: 50 μg/kg(21) • Keep in nitrite-free containers The direction for use “wear suitable gloves” must be included in label or leaflet text. · The mixing ratio must be printed on the label. 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 Do not use to dye eyelashes or eyebrows

Substance identity

Official source name
p-Methylaminophenol and its sulphate p-Methylaminophenol p-Methylaminophenol sulphate CAS No 150-75-4/ 55-55-0 / 1936-57-8
CAS
150-75-4; 55-55-0; 1936-57-8
EC
Not supplied in this source row
Identity mapping
standalone:official_asean_record
Search this identity across the siteCAS 150-75-4CAS 55-55-0CAS 1936-57-8

Cross-market snapshot for this identity

Exact linked records currently present in this site. An absent market means no imported exact match, not permission to use the substance.

8 market datasets
PubChem 2D chemical structure for CAS 150-75-4
CAS 150-75-4PubChem CID 5931

Verified chemistry for CAS 150-75-4

n-Methyl-p-aminophenol

IUPAC name
4-(methylamino)phenol
Molecular formula
C7H9NO
Molecular weight
123.15 g/mol
Exact mass
123.068413911 Da
Monoisotopic mass
123.068413911 Da
XLogP3
1.9
Topological polar surface area
32.3 Ų
Molecular complexity
77.0
Formal charge
0
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Rotatable bonds
1
Heavy atoms
9
Covalent units
1

Names and synonyms reported to PubChem

4-MethylaminophenolN-Methyl-4-aminophenolParamethylaminophenolPhenol, p-(methylamino)-N-methyl-4-hydroxyanilineCHEBI:5541611W1883EFB4-N-methylaminophenol
16 more reported names
RefChem:163709205-768-2p-MethylaminophenolPhenol, 4-(methylamino)-p-(Methylamino)phenol4-methylamino-phenolNSC-7311p-(methylamino)-phenoHSDB 4320NSC 7311EINECS 205-768-2BRN 1363740UNII-11W1883EFBp-(methylamEnamine_001032p-(N-methylamino)phenol
Open full PubChem recordSafety and hazards at PubChemPubChem annotationsChemical classifications3D structure image
External database identifiers
Advanced structure statistics
Defined atom stereocentres
0
Undefined atom stereocentres
0
Defined bond stereocentres
0
Undefined bond stereocentres
0
3D pharmacophore features
4
3D rings
1
3D hydrophobes
0
3D acceptor features
0
3D donor features
2
3D anionic centres
0
3D cationic centres
1
3D conformers
2
Effective 3D rotors
1.0
Machine-readable structure identifiers
SMILES
CNC1=CC=C(C=C1)O
InChI
InChI=1S/C7H9NO/c1-8-6-2-4-7(9)5-3-6/h2-5,8-9H,1H3
InChIKey
ZFIQGRISGKSVAG-UHFFFAOYSA-N

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

PubChem 2D chemical structure for CAS 55-55-0
CAS 55-55-0PubChem CID 5930

Verified chemistry for CAS 55-55-0

Metol

IUPAC name
bis(4-(methylamino)phenol);sulfuric acid
Molecular formula
C14H20N2O6S
Molecular weight
344.39 g/mol
Exact mass
344.10420754 Da
Monoisotopic mass
344.10420754 Da
Topological polar surface area
148.0 Ų
Molecular complexity
158.0
Formal charge
0
Hydrogen-bond donors
6
Hydrogen-bond acceptors
8
Rotatable bonds
2
Heavy atoms
23
Covalent units
3

Names and synonyms reported to PubChem

GrapholMetatylPhotolPictolArmolGenolVerolElon (developer)
16 more reported names
p-MethylaminophenolsulfateParamethylaminophenol sulfateMethyl-p-aminophenol sulfatep-Methylaminophenol sulphate (2:1)ElonD3W0VWG12MN-Methyl-4-hydroxyaniline hemisulfateJAROCOL PMAPBis(4-hydroxy-N-methylanilinium) sulphateCOLOREX PMPhenol, 4-(methylamino)-, sulfate salt (2:1)4-(Methylamino)phenol sulfate (2:1) saltNSC-148345RefChem:169360200-237-14-(Methylamino)phenol sulfate
Open full PubChem recordSafety and hazards at PubChemPubChem annotationsChemical classifications3D structure image
External database identifiers
Advanced structure statistics
Defined atom stereocentres
0
Undefined atom stereocentres
0
Defined bond stereocentres
0
Undefined bond stereocentres
0
3D conformers
0
Machine-readable structure identifiers
SMILES
CNC1=CC=C(C=C1)O.CNC1=CC=C(C=C1)O.OS(=O)(=O)O
InChI
InChI=1S/2C7H9NO.H2O4S/c2*1-8-6-2-4-7(9)5-3-6;1-5(2,3)4/h2*2-5,8-9H,1H3;(H2,1,2,3,4)
InChIKey
ZVNPWFOVUDMGRP-UHFFFAOYSA-N

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Official source and provenance

Registered source
ASEAN Cosmetic Directive annexes
Source reference
ASEAN Annex III, reference 223
Source record ID
III-223
Source version
2026-1
Source language
English
Translation status
Original is English
Source updated
2026-06-22
Snapshot checked
2026-08-30 04:44 UTC
Validation method
pdfplumber ruled-table extraction with per-annex reviewed counts
SHA-256
ffad59f6c01a92c82042c54203ee14969425c2a82bd04c2f4012ff82513e69f1

Registered dataset notes

Dataset coverage
Banned, restricted and positive-list substances under the harmonised ASEAN framework
Authority note
Regional directive; member-state transitions and deviations still require local verification
Inspect the exact official sourceRegulator guidance

How this record fits the market dataset

2224
current ASEAN records
249
records marked Restricted
2224
records from this source version
1930
market records with CAS identity

Status distribution

Permitted list with conditions: 247Prohibited: 1728Restricted: 249

Condition text is present on 462 of 2224 current records. An empty condition field is interpreted according to the record type above; it is never converted into an unrestricted-use claim.

ASEAN market context

Complete regional annex dataset

Coverage version: ASEAN Cosmetic Directive annexes 2026-1, 22 June 2026

Annexes II, III, IV, VI and VII covering prohibited, restricted and positive-list substances.

Verification checklist

  1. Search all ACD annexes by name and identifiers.
  2. Apply product type, maximum level and warning conditions.
  3. Confirm the target member state's adoption and transition date.
  4. Complete the local notification and responsible-company requirements.

Official market sources

Verification workflow and record completeness

Before using this result in a compliance decision

  1. Confirm that “p-Methylaminophenol and its sulphate p-Methylaminophenol p-Methylaminophenol sulphate CAS No 150-75-4/ 55-55-0 / 1936-57-8” and every CAS/EC identifier refer to the material in your supplier specification.
  2. Search all ACD annexes by name and identifiers.
  3. Apply product type, maximum level and warning conditions.
  4. Confirm the target member state's adoption and transition date.
  5. Complete the local notification and responsible-company requirements.
  6. Document the source version and recheck the regulator before manufacture, notification or market placement.

Fields available in this record

  • Official substance nameAvailable
  • CASAvailable
  • ECNot supplied
  • Separate condition textAvailable
  • Effective dateNot supplied
  • Snapshot hash and methodAvailable

Questions this page answers

This substance is not unrestricted: cosmetic use is subject to the conditions in the cited official record. Check product type, body area, concentration, purity and warning requirements before deciding whether a formulation is compliant.

If this row does not reproduce conditions, open the cited official detail because omission does not mean unrestricted use. Regional annex coverage does not replace member-state implementation dates, notifications or national deviations.

The record cites ASEAN Annex III, reference 223, source version 2026-1. Open the official source.

No. CAS helps resolve identity, but jurisdictions can classify the same substance differently and can apply different product scopes, limits, warnings and transition dates.

Stable citation

p-Methylaminophenol and its sulphate p-Methylaminophenol p-Methylaminophenol sulphate CAS No 150-75-4/ 55-55-0 / 1936-57-8. ASEAN Annex III, reference 223. ASEAN. Source version 2026-1. CosIng Checker regulatory record: https://cosingchecker.com/regulations/asean/records/3981/

Cite the regulator as the legal authority. This page is a structured evidence index and verification aid, not a substitute for the official text or professional legal assessment.

Interpretation and limits for ASEAN

This substance is not unrestricted: cosmetic use is subject to the conditions in the cited official record.

Check product type, body area, concentration, purity and warning requirements before deciding whether a formulation is compliant.

How to interpret the legal role

The cited row forms part of a binding rule or legally incorporated list for this market.

Evidence on this page

  • Recorded outcome: Restricted
  • Legal role: Binding rule
  • Source version: 2026-1

What it does not prove

Regional annex coverage does not replace member-state implementation dates, notifications or national deviations.

Further authoritative substance research

These sources can add identity, safety, exposure or hazard context. A link is not evidence that the database contains this exact substance, and none of these sources overrides the market decision above.

Cosmetic Ingredient Review safety assessments

Expert Panel conclusions, assessed ingredient groups, use conditions, dates and report documents

Independent expert review considered by FDA; not a government approval or binding market rule

Research this identity at the source

FDA Global Substance Registration System

UNII identifiers, preferred names, substance types, codes and public substance relationships

Identity registry only; UNII availability does not imply FDA review or approval

Research this identity at the source

ILO/WHO International Chemical Safety Cards

Hazards, symptoms, first aid, storage, incompatibilities and physical properties for covered chemicals

International occupational chemical-safety reference; not cosmetic-use approval

Research this identity at the source

Japan NITE-CHRIP

Chemical identity, Japanese and foreign legal lists, GHS hazards and exposure-related information

Chemical-management evidence; cosmetic status remains governed by the applicable MHLW standard and market rules

Research this identity at the source

NIOSH Pocket Guide to Chemical Hazards

REL, PEL, IDLH, properties, exposure routes, symptoms, target organs, first aid and measurement methods for covered workplace chemicals

US occupational-health guidance and limits; not a cosmetic ingredient decision

Research this identity at the source

OECD eChemPortal

Gateway to authority-owned physical-property, fate, ecotoxicity, toxicity, exposure and GHS records

Discovery gateway; each linked authority remains responsible for its data

Research this identity at the source

US EPA CompTox CTX APIs

API key required for import

DTXSID identity, experimental and predicted properties, toxicity, bioactivity, exposure and environmental data

Scientific and computational evidence; predictions must remain labelled and do not determine cosmetic legality

Research this identity at the source