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CAS 2 records

CAS 2353-45-9

CAS 2353-45-9 matches 2 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 2353-45-9
CAS 2353-45-9PubChem CID 16887

Fast Green FCF

Fast green FCF is an organic sodium salt having 2-{(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)[4-{ethyl[(3-sulfonatophenyl)methyl]iminio}cyclohexa-2,5-dien-1-ylidene]methyl}-5-hydroxybenzene-1-sulfonate as the counterion. Used as a substitute for Light green SF yellowish in Masson's trichrome as it is less likely to fade, and is more brilliant in colour. Also used as a food colouring agent. It has a role as a fluorochrome, a histological dye and a food colouring. It contains a Fast green FCF(2-). — ChEBI

IUPAC name
disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-5-hydroxybenzenesulfonate
Molecular formula
C37H34N2Na2O10S3
Molecular weight
808.9 g/mol
Exact mass
808.11709737 Da
Topological polar surface area
223.0 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
11
Covalent units
3
Defined stereocentres
0

Also known as

Food green 3Solid Green FCFFood Green No. 3FD & C Green no. 3C.I. Food Green 3C.I. 42053Zelen Stala FCFAizen Food Green No. 3
16 more reported names
C.I. FOOD GREEN 3, DISODIUM SALTZelen potravinarska 33P3ONR6O1SCHEBI:82468Green No. 3FDC Green No. 3F D & C Green No. 3RefChem:140009FD&C Green No. 3FAST GREEN FCF [MI]Fast Green FCF (Technical Grade)5-[[4-[ethyl-[(3-sulfophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-2-hydroxybenzenesulfonateSodium 2-((4-(ethyl(3-sulfonatobenzyl)amino)phenyl)(4-(ethyl(3-sulfonatobenzyl)iminio)cyclohexa-2,5-dien-1-ylidene)methyl)-5-hydroxybenzenesulfonate1724 GreenZelen Stala FCF [Czech]Sodium 2-((E)-(4-(ethyl(3-sulfonatobenzyl)amino)phenyl)((E)-4-(ethyl(3-sulfonatobenzyl)iminio)cyclohexa-2,5-dien-1-ylidene)methyl)-5-hydroxybenzenesulfonate
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External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 2353-45-9

2 total
Annex
IV
Entry
61

CI 42053/ FAST GREEN FCF

Benzene-methanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(4-hydroxy-2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt
EC
219-091-5

How CAS 2353-45-9 is used on this site

CAS 2353-45-9 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 2 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 2353-45-9 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 2353-45-9 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

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