4′,5′-Dibromofluorescein

Name: 4′,5′-Dibromofluorescein
Brand: Vaqora Chemicals
SKU: VQ-000443

About 4′,5′-Dibromofluorescein

Listed under CAS 596-03-2, 4′,5′-Dibromofluorescein is a biological stain available from Vaqora Chemicals. The compound has the formula C20H10Br2O5, corresponding to a molecular weight of 490.1 g/mol. The IUPAC name is 4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one. Common synonyms include Solvent Red 72 and 4',5'-Dibromofluorescein.

It is supplied as an orange powder. Literature values give a melting point of 270-273 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Danger” with 2 hazard statements. Review the Safety Data Sheet before use.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and dyes and pigments manufacture. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 5 g, 25 g and 1 kg packs, 4′,5′-Dibromofluorescein is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Dyes & pigments manufacture

Industries

Specifications & identifiers

Chemical identifiers
Product name	4′,5′-Dibromofluorescein
Catalogue No.	VQ-000443
CAS Number	596-03-2
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	489.8875
HSN code	32049000
InChIKey	ZDTNHRWWURISAA-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C(=O)OC23C4=C(C(=C(C=C4)O)Br)OC5=C3C=CC(=C5Br)O
PubChem CID	11689

Physical properties
Physical form	Powder
Appearance	Orange powder
Melting point	270-273 °C
LogP (XLogP3)	4.8
H-bond donors / acceptors	2 / 5
TPSA	76 Å²
UN number	UN 2811
Synonyms	Solvent Red 72, 4',5'-Dibromofluorescein, Eosinic acid, Japan Orange 201, D&C Orange No. 5, 4',5'-Dibromofluororescein, D & C Orange no. 5, Japan Orange No. 201, 4',5'-Dibromo-3',6'-dihydroxyspiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one, 5-19-06-00462 (Beilstein Handbook Reference), orange 5, Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-

Safety & hazard information (GHS)

Toxic

Signal word: Danger

Hazard statements

H301Toxic if swallowed
H412Harmful to aquatic life with long lasting effects

Precautionary statements: P264, P270, P273, P301 + P316, P321, P330, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 4′,5′-Dibromofluorescein?

The CAS Registry Number of 4′,5′-Dibromofluorescein is 596-03-2. It is also known as Solvent Red 72, 4',5'-Dibromofluorescein, Eosinic acid.

What is the molecular formula and molecular weight of 4′,5′-Dibromofluorescein?

4′,5′-Dibromofluorescein has the molecular formula C20H10Br2O5 and a molecular weight of 490.1 g/mol. Its IUPAC name is 4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one.

Which grade and pack sizes of 4′,5′-Dibromofluorescein can I order?

We supply 4′,5′-Dibromofluorescein, in 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 4′,5′-Dibromofluorescein?

Yes. Every lot of 4′,5′-Dibromofluorescein is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 4′,5′-Dibromofluorescein be shipped internationally?

Yes. 4′,5′-Dibromofluorescein is classified as hazardous (UN 2811), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.