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CAS 2 records

CAS 596-03-2

CAS 596-03-2 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 596-03-2
CAS 596-03-2PubChem CID 11689

D & C Orange No. 5

IUPAC name
4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular formula
C20H10Br2O5
Molecular weight
490.1 g/mol
Exact mass
489.88745 Da
XLogP3
4.8
Topological polar surface area
76.0 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
5
Covalent units
1
Defined stereocentres
0

Also known as

4',5'-DibromofluoresceinEosinic acidJapan Orange 201D&C Orange No. 54',5'-DibromofluororesceinC.I. 45370:1CCRIS 4900DAIDAI201
16 more reported names
EINECS 209-876-0BRN 00571895P3H5X9X4QJapan Orange No. 2014',5'-Dibromo-3',6'-dihydroxyspiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one5-19-06-00462 (Beilstein Handbook Reference)orange 5Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-4',5'-DIBROMOFLUORESCEIN [MI]4',5'-Dibromo-3',6'-dihydroxyspiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, disodium salt4',5'-dibromo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-oneRefChem:581446DC ORANGE NO. 5ORANGE 5 [INCI]DAIDAI201 [INCI]
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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.

Records for CAS 596-03-2

2 total
No records found for this CAS number.

How CAS 596-03-2 is used on this site

CAS 596-03-2 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 596-03-2 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.