548-24-3 OMS4XQD1T0 Eosine I Bluish Eosin B 2-(4,5-Dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt AI3-63053 EINECS 208-943-1 C.I. 45400 C.I. Acid Red 91 Dibromodinitrofluorescein sodium Eosin BA Eosine B Eosine BA Eosine BN Eosine BNX Saffrosine UNII-OMS4XQD1T0 CAS 548-24-3

Purity 97%+In StockPharmaceutical Standards
CAS No.548-24-3
Molecular FormulaC20H18Br2N2O9
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

548-24-3 OMS4XQD1T0 Eosine I Bluish Eosin B 2-(4,5-Dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt AI3-63053 EINECS 208-943-1 C.I. 45400 C.I. Acid Red 91 Dibromodinitrofluorescein sodium Eosin BA Eosine B Eosine BA Eosine BN Eosine BNX Saffrosine UNII-OMS4XQD1T0 CAS 548-24-3 chemical structure

Description

The molecular framework of 548-24-3 OMS4XQD1T0 Eosine I Bluish Eosin B 2-(4,5-Dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt AI3-63053 EINECS 208-943-1 C.I. 45400 C.I. Acid Red 91 Dibromodinitrofluorescein sodium Eosin BA Eosine B Eosine BA Eosine BN Eosine BNX Saffrosine UNII-OMS4XQD1T0 (C20H18Br2N2O9Na) is characterized by a salt form, a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

CATO supplies 548-24-3 OMS4XQD1T0 Eosine I Bluish Eosin B 2-(4,5-Dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt AI3-63053 EINECS 208-943-1 C.I. 45400 C.I. Acid Red 91 Dibromodinitrofluorescein sodium Eosin BA Eosine B Eosine BA Eosine BN Eosine BNX Saffrosine UNII-OMS4XQD1T0 (CAS 548-24-3), a certified reference material (molecular formula C20H18Br2N2O9Na, MW 613.17 g/mol) for analytical method development and quality control.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

CATO manufactures 548-24-3 OMS4XQD1T0 Eosine I Bluish Eosin B 2-(4,5-Dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt AI3-63053 EINECS 208-943-1 C.I. 45400 C.I. Acid Red 91 Dibromodinitrofluorescein sodium Eosin BA Eosine B Eosine BA Eosine BN Eosine BNX Saffrosine UNII-OMS4XQD1T0 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC20H18Br2N2O9 2*Na
Molecular Weight613.17 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Halogen ContentBr-containing
Nitrogen Atoms2

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