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Chemical structure of D & C Orange No. 5

GB55306

D & C Orange No. 5

Also listed as 4',5'-Dibromofluorescein

D & C Orange No. 5 (catalogue number GB55306) is a research-grade chemical available from LABO Scientific in Israel, CAS registry number 596-03-2. Molecular formula C20H10Br2O5, molecular weight 490.1. IUPAC name: 4',5'-dibromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one. Supplied in 2 pack sizes, from 25g at ₪85.66 to 100g at ₪248.81; the final price is confirmed on your quote, and the lot certificate of analysis and safety data sheet are emailed with your order confirmation.

ChemicalCAS596-03-2MW490.1FormulaC20H10Br2O5
CAS number
596-03-2
Molecular weight
490.1
Formula
C20H10Br2O5
Solubility
DMSO ： 62·5 mg/mL (127·52 mM; Need ultrasonic)
InChIKey
ZDTNHRWWURISAA-UHFFFAOYSA-N
Catalogue number
GB55306
Brand
GLPBIO
Computed properties PubChem CID 11689 · XLogP 4.8 · TPSA 76 Ų · H-bond donors 2
XLogP
4.8
TPSA
76 Ų
H-bond donors
2
H-bond acceptors
5
Rotatable bonds
0
Heavy atoms
27

SMILES C1=CC=C2C(=C1)C(=O)OC23C4=C(C(=C(C=C4)O)Br)OC5=C3C=CC(=C5Br)O

Computed descriptors from PubChem (CID 11689), public domain. Identity cross-checked against the supplier's molecular formula and weight — verify before use.

Ordering in Israel

Lead time
Ships from the manufacturer to your lab in 8–14 business days; customs and cold chain handled by LABO Scientific.
Pricing
Quoted in ILS, excl. VAT. Add the item to your quote and we confirm the final price, usually the same business day.
Documents
Lot certificate of analysis and manufacturer SDS are emailed with your order confirmation.
Who we serve
Universities, hospitals and biotech companies across Israel. Research use only — not for diagnostic or therapeutic use.