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Stains, Fluorescent Dyes & Histology Reagents

4′,5′-Dibromofluorescein

Available on request

Buy 4′,5′-Dibromofluorescein (CAS 596-03-2) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Packs from 5 g.

Pack sizes
4′,5′-Dibromofluorescein chemical structure
CAS number596-03-2
FormulaC20H10Br2O5
Molar mass490.1 g/mol
Physical formPowder
HS code32049000
UN numberUN 2811
InChIKeyZDTNHRWWURISAA-UHFFFAOYSA-N
IUPAC name4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one

About 4′,5′-Dibromofluorescein

Researchers and plant chemists source 4′,5′-Dibromofluorescein from Zemixal for routine and specialised work. Identity at a glance: CAS 596-03-2, formula C20H10Br2O5 and molar mass 490.1 g/mol. Typical appearance is orange powder.

Use cases we see most often

  • Histology & cytology staining
  • Microscopy
  • Clinical laboratories
  • Dyes & pigments manufacture

Storage and safety notes

Reported physical data: melting point 270-273 °C. It carries the GHS signal word Danger (H301 and H412), so wear gloves and eye protection and work with good ventilation. For transport it ships as UN UN 2811.

Standard pack sizes are 5 g, 25 g and 1 kg, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Typical uses

  • Histology & cytology staining
  • Microscopy
  • Clinical laboratories
  • Dyes & pigments manufacture

Applications

Diagnostics, Life Science and BiotechResearch Labs and UniversitiesTextiles, Dyes and Leather

Specifications and identifiers

Specifications of 4′,5′-Dibromofluorescein
Product name4′,5′-Dibromofluorescein
Catalogue numberZX-000443
CAS number596-03-2
IUPAC name4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular formulaC20H10Br2O5
Molar mass490.1 g/mol
Exact mass489.8875
Physical formPowder
AppearanceOrange powder
Melting point270-273 °C
XLogP34.8
H-bond donors / acceptors2 / 5
Topological polar surface area76 Ų
HS code32049000
UN numberUN 2811
InChIKeyZDTNHRWWURISAA-UHFFFAOYSA-N
SMILESC1=CC=C2C(=C1)C(=O)OC23C4=C(C(=C(C=C4)O)Br)OC5=C3C=CC(=C5Br)O
PubChem CID11689
SynonymsSolvent 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-

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS06 Acute toxicity
Acute toxicity

Signal word Danger

  • H301Toxic if swallowed
  • H412Harmful to aquatic life with long lasting effects

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

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of 4′,5′-Dibromofluorescein
5 gQuoted on request
25 gQuoted on request
1 kgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about 4′,5′-Dibromofluorescein

Which CAS number identifies 4′,5′-Dibromofluorescein?
4′,5′-Dibromofluorescein is registered under CAS 596-03-2. You may also see it listed as Solvent Red 72, 4',5'-Dibromofluorescein, Eosinic acid. Our catalogue number for this item is ZX-000443.
What are the formula and molar mass of 4′,5′-Dibromofluorescein?
For 4′,5′-Dibromofluorescein, its formula is C20H10Br2O5 and its molar mass is 490.1 g/mol. The systematic (IUPAC) name is 4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one. InChIKey ZDTNHRWWURISAA-UHFFFAOYSA-N lets you match it in any structure database.
What grade and pack sizes are available for 4′,5′-Dibromofluorescein?
The grade and assay are confirmed on the quotation and the batch COA. Standard packs are 5 g, 25 g, 1 kg. Larger quantities and custom packing can be quoted on request.
Which documents come with 4′,5′-Dibromofluorescein?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship 4′,5′-Dibromofluorescein to my country?
Yes. Because 4′,5′-Dibromofluorescein is classed as hazardous (UN 2811), it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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