Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate and aluminium lake (Cl 16255) (see note 17).
Listed by the Saudi Food and Drug Authority as restricted in cosmetic products; open the cited detail for the current conditions.
Regulatory decision and full conditions
- Status
- Restricted
- Legal role
- Binding rule
- Regulatory summary
- Listed by the Saudi Food and Drug Authority as restricted in cosmetic products; open the cited detail for the current conditions.
- Conditions and restrictions
- If this row does not reproduce conditions, open the cited official detail because omission does not mean unrestricted use. Open the cited source and apply the market-wide requirements below.
Substance identity
- Official source name
- Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate and aluminium lake (Cl 16255) (see note 17).
- CAS
- 2611-82-7; 12227-64-4
- EC
- 235-438-3
- Identity mapping
- cas_number
- Linked ingredient
- ACID RED 18 ALUMINUM LAKE
Linked CosIng identity data
Names and aliases
CosIng description: Aluminium, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3-naphthalenedisulfonic acid complex (CI 16255:1)
EU inventory restriction note: III/192 (Acid Red 18; Acid Red 18 Aluminum Lake) IV/35 (CI 16255)
Recorded cosmetic function: HAIR DYEING
Function pages:HAIR DYEING
View the complete ingredient profileCross-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.
European Union
2 linked records · 2 with specific conditions
Open supporting recordGreat Britain
1 linked record · 1 with specific conditions
Open supporting recordNew Zealand
3 linked records · 3 with specific conditions
Open supporting recordASEAN
1 linked record · 1 with specific conditions
Open supporting recordIndia
1 linked record · 1 with specific conditions
Open supporting recordSaudi Arabia
Current record1 linked record
Open supporting recordVerified chemistry for CAS 12227-64-4
Ponceau 4R aluminum
- IUPAC name
- aluminum 7-hydroxy-8-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonate
- Molecular formula
- C20H11AlN2O10S3
- Molecular weight
- 562.5 g/mol
- Exact mass
- 561.9391215 Da
- Monoisotopic mass
- 561.9391215 Da
- Topological polar surface area
- 242.0 Ų
- Molecular complexity
- 1080.0
- Formal charge
- 0
- Hydrogen-bond donors
- 1
- Hydrogen-bond acceptors
- 12
- Rotatable bonds
- 2
- Heavy atoms
- 36
- Covalent units
- 2
Names and synonyms reported to PubChem
5 more reported names
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
C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C=CC4=CC(=CC(=C43)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Al+3]- InChI
InChI=1S/C20H14N2O10S3.Al/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);/q;+3/p-3- InChIKey
LHUJXRCUDUXSCN-UHFFFAOYSA-K
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Note: This chemical does not meet GHS hazard criteria for 100% (5 of 5) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 5 of 5 companies. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 5 reports by companies from 1 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 5 of 5 reports by companies.; There are 0 notifications provided by 0 of 5 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Verified chemistry for CAS 2611-82-7
C.I. Acid Red 18, trisodium salt
- IUPAC name
- trisodium;7-hydroxy-8-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonate
- Molecular formula
- C20H11N2Na3O10S3
- Molecular weight
- 604.5 g/mol
- Exact mass
- 603.92689092 Da
- Monoisotopic mass
- 603.92689092 Da
- Topological polar surface area
- 242.0 Ų
- Molecular complexity
- 1080.0
- Formal charge
- 0
- Hydrogen-bond donors
- 1
- Hydrogen-bond acceptors
- 12
- Rotatable bonds
- 2
- Heavy atoms
- 38
- Covalent units
- 4
Names and synonyms reported to PubChem
16 more reported names
External database identifiers
- EPA DTXSID:DTXSID9021213
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
C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C=CC4=CC(=CC(=C43)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+].[Na+]- InChI
InChI=1S/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3*+1/p-3- InChIKey
SWGJCIMEBVHMTA-UHFFFAOYSA-K
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
- Saudi SFDA prohibited and restricted ingredient lists
- Source reference
- SFDA restricted list, page 18, row 9
- Source record ID
restricted-17-9- Source version
- live-snapshot-2026-08-30
- Source language
- English
- Translation status
- Original is English
- Snapshot checked
- 2026-08-30 05:18 UTC
- Validation method
- complete SFDA paginated HTML snapshot; strict page/row counts
- SHA-256
ceb6cc636e6b1f4b3013f88ce0297217b49d6194342c6ece5c03b1e04256d71a
Registered dataset notes
- Dataset coverage
- Prohibited and restricted substances with CAS, EC and conditions
- Authority note
- Official SFDA dated lists; version and hash each release
How this record fits the market dataset
Status distribution
Condition text is present on 0 of 2090 current records. An empty condition field is interpreted according to the record type above; it is never converted into an unrestricted-use claim.
Saudi Arabia market context
Complete official list index
Coverage version: SFDA live prohibited/restricted lists, snapshot 30 August 2026
Every page and entry in the public SFDA prohibited and restricted ingredient indexes; restricted detail pages remain the source for conditions.
Verification checklist
- Search names and CAS across both SFDA lists.
- Open the cited restricted-entry detail and apply every condition.
- Check current SFDA/GSO technical regulations and updates.
- Complete eCosma notification, label and responsible-party requirements.
Official market sources
- Saudi SFDA prohibited and restricted ingredient listsOfficial SFDA dated lists; version and hash each release
Verification workflow and record completeness
Before using this result in a compliance decision
- Confirm that “Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate and aluminium lake (Cl 16255) (see note 17).” and every CAS/EC identifier refer to the material in your supplier specification.
- Search names and CAS across both SFDA lists.
- Open the cited restricted-entry detail and apply every condition.
- Check current SFDA/GSO technical regulations and updates.
- Complete eCosma notification, label and responsible-party requirements.
- Document the source version and recheck the regulator before manufacture, notification or market placement.
Fields available in this record
- Official substance nameAvailable
- CASAvailable
- ECAvailable
- Separate condition textNot present in source row
- Effective dateNot supplied
- Snapshot hash and methodAvailable
Questions this page answers
Stable citation
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate and aluminium lake (Cl 16255) (see note 17).. SFDA restricted list, page 18, row 9. Saudi Arabia. Source version live-snapshot-2026-08-30. CosIng Checker regulatory record: https://cosingchecker.com/regulations/sa/records/11504/
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 Saudi Arabia
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: live-snapshot-2026-08-30
What it does not prove
No list match is not permission; Gulf/SFDA product, claim, notification and technical requirements still apply.
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 sourceFDA 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 sourceILO/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 sourceJapan 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 sourceNIOSH 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 sourceOECD 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 sourceUS EPA CompTox CTX APIs
API key required for importDTXSID 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