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InventoryRef cosing-live-991002023-05-23

AMMONIUM XANTHOMMATIN

Ammonium Xanthommatin is the organic compound that conforms to the formula:

AMMONIUM XANTHOMMATIN is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

Chemical identity and properties

PubChem 2D chemical structure for CAS 521-58-4
CAS 521-58-4PubChem CID 98312

alpha-Amino-3-carboxy-1-hydroxy-gamma,5-dioxo-5H-pyrido(3,2-a)phenoxazine-11-butanoic acid

Xanthommatin is an ommochrome that consists of a pyrido[3,2-a]phenoxazine ring system bearing hydroxy, carboxy, oxo and 3-amino-3-carboxypropanoyl substituents at positions 1, 3, 5 and 11 respectively. The parent of the class of xanthommatins. It is a conjugate acid of a xanthommatin(1-). — ChEBI

IUPAC name
11-(3-amino-3-carboxypropanoyl)-1,5-dioxo-4H-pyrido[3,2-a]phenoxazine-3-carboxylic acid
Molecular formula
C20H13N3O8
Molecular weight
423.3 g/mol
Exact mass
423.07026438 Da
XLogP3
-2.7
Topological polar surface area
185.0 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
11
Covalent units
1
Defined stereocentres
0

Also known as

XanthommatinXanthomattin3BMW3J9GSZNSC-10084911-(3-amino-3-carboxypropanoyl)-1-hydroxy-5-oxo-5H-pyrido[3,2-a]phenoxazine-3-carboxylic acidCHEBI:16550alpha-Amino-3-carboxy-1-hydroxy-gamma,5-dioxo-5H-pyrido[3,2-a]phenoxazine-11-butanoic acid11-(3-amino-3-carboxypropanoyl)-1-hydroxy-5-oxo-5H-pyrido(3,2-a)phenoxazine-3-carboxylic acid
6 more reported names
RefChem:915476NSC 100849I+/--Amino-3-carboxy-1-hydroxy-I(3),5-dioxo-5H-pyrido[3,2-a]phenoxazine-11-butanoic acid4H-Pyrido[3,2-a]phenoxazine-11-butanoic acid, alpha-amino-3-carboxy-1,5-dihydro-gamma,1,5-trioxo-5H-Pyrido(3,2-a)phenoxazine-11-butanoic acid, alpha-amino-3-carboxy-1-hydroxy-gamma,5-dioxo- (VAN)5H-Pyrido[3,2-a]phenoxazine-11-butanoic acid, alpha-amino-3-carboxy-1-hydroxy-gamma,5-dioxo-
External database identifiers

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 European Commission record

CosIng substance ID
99100
Entry status
Active
Published in the Official Journal
Yes
Recorded by the Commission
2023-05-23
Open this entry in the official CosIng database

Fields as published by the European Commission. The link opens the entry itself, not a search for it.

Inventory details for AMMONIUM XANTHOMMATIN

INCI name

AMMONIUM XANTHOMMATIN

Description

Ammonium Xanthommatin is the organic compound that conforms to the formula:

Record provenance

Inventory reference
cosing-live-99100
Imported identity
AMMONIUM XANTHOMMATIN
Source update
2023-05-23
European Commission CosIng source notes

Key data

CAS
521-58-4 (free base)
EC
—
Restriction
—
Function
ANTIOXIDANT
Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

Ingredients with overlapping formulation functions

Additional official and scientific sources

11 external databases to check this identity in

How AMMONIUM XANTHOMMATIN appears in the CosIng inventory

The CosIng inventory lists AMMONIUM XANTHOMMATIN as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

AMMONIUM XANTHOMMATIN is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

AMMONIUM XANTHOMMATIN is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, AMMONIUM XANTHOMMATIN carries the following function designation(s):

CAS 521-58-4 (free base) may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

Source note for AMMONIUM XANTHOMMATIN

This page reproduces the CosIng inventory entry for AMMONIUM XANTHOMMATIN from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research AMMONIUM XANTHOMMATIN and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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