CI 19140 / ACID YELLOW 23
Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
CI 19140 / ACID YELLOW 23 is listed in Annex III and may only be used under the conditions shown in this record. Maximum concentration in this record: 0.5%.
Chemical identity and properties
C.I. Pigment Yellow 100
C.I. Pigment Yellow 100 is an organonitrogen compound and an organooxygen compound. It is functionally related to an alpha-amino acid. — ChEBI
- IUPAC name
- aluminum tris(4-[[3-carboxy-5-oxo-1-(4-sulfophenyl)-4H-pyrazol-4-yl]diazenyl]benzenesulfonate)
- Molecular formula
- C48H33AlN12O27S6
- Molecular weight
- 1429.2 g/mol
- Exact mass
- 1427.9717743 Da
- Topological polar surface area
- 669.0 Ų
- Hydrogen-bond donors
- 6
- Hydrogen-bond acceptors
- 36
- Covalent units
- 4
- Defined stereocentres
- 0
Also known as
2 more reported names
External database identifiers
- ChEBI:CHEBI:189920
- EPA DTXSID:DTXSID2025921
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Melting Point: greater than 572 °F (NTP, 1992) Source: CAMEO Chemicals
- Physical Description: C.i. pigment yellow 100 is a yellow to greenish-yellow powder. (NTP, 1992) Source: CAMEO Chemicals
- Physical Description: Liquid; Other Solid; Wet Solid Source: EPA Chemical Data Reporting (CDR)
- Solubility: less than 1 mg/mL at 70 °F (NTP, 1992) Source: CAMEO Chemicals
- First Aid: EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.; SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.; INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) shou Source: CAMEO Chemicals
- Note: This chemical does not meet GHS hazard criteria for 100% (503 of 503) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 503 of 503 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 503 reports by companies from 1 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 503 of 503 reports by companies.; There are 0 notifications provided by 0 of 503 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)
- Consumer Uses: Dye; Pigment Source: EPA Chemical Data Reporting (CDR)
- Industry Uses: Dye Source: EPA Chemical Data Reporting (CDR)
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 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Tartrazine
Tartrazine is an organic sodium salt which is the trisodium salt of tartrazine acid. A synthetic lemon yellow azo dye used as a food colouring. It has a role as a histological dye and a food colouring. It contains a tartrazine(3-). — ChEBI
- IUPAC name
- trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate
- Molecular formula
- C16H9N4Na3O9S2
- Molecular weight
- 534.4 g/mol
- Exact mass
- 533.95040307 Da
- Topological polar surface area
- 229.0 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 12
- Covalent units
- 4
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:9405
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Record details
Maximum concentration
0.5%
INCI glossary name
CI 19140 / ACID YELLOW 23
Chemical name
Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake (see note 17). CI 19140
Chemical / IUPAC name
Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate and aluminium lake; CI 19140
Regulatory information
SCCS opinions
- Opinion on Acid Yellow 23
Identified ingredients
Key data
Inventory links for CI 19140 / ACID YELLOW 23
Related records for CI 19140 / ACID YELLOW 23
ACID BLUE 9
6-METHOXY-2-METHYLAMINO-3-AMINOPYRIDINE HCL
What Annex III means for CI 19140 / ACID YELLOW 23
CI 19140 / ACID YELLOW 23 is a restricted substance under Annex III of EU Cosmetics Regulation 1223/2009. Its use in cosmetics is only permitted under the specific conditions set out in the entry above, including applicable concentration limits, product type restrictions and required warning statements.
When including this substance in a formulation, all conditions — maximum concentration, product scope and warning labels — must be met simultaneously. Compliance with one condition does not override the others.
This record is linked to 3 CosIng inventory ingredients for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.
Compliance checklist
- Ensure formulation concentration does not exceed: 0.5%
- Confirm product type compatibility: Hair dye substance in non-oxidative hair dye products
- Document conditions of use in the Product Information File (PIF).
Frequently asked questions
Source note for Annex III record CI 19140 / ACID YELLOW 23
This page summarizes one Annex III record for CI 19140 / ACID YELLOW 23 from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.
Use this record page to review Annex III conditions for CI 19140 / ACID YELLOW 23, but confirm any final regulatory decision against the current official annex wording and source files.
Tools & next steps
Check your formula
Paste a full INCI list to detect CI 19140 / ACID YELLOW 23 and other flagged EU annex records in one pass.
INCI CheckerCompare entries
Compare CI 19140 / ACID YELLOW 23 side by side with another annex record to review differences in restrictions, concentrations and annex placement.
CompareBrowse the annex
See all records in Annex III and compare regulatory conditions across substances in this annex.
Open Annex III