Rose Bengal lactone

Name: Rose Bengal lactone
Brand: Vaqora Chemicals
SKU: VQ-008938

About Rose Bengal lactone

Listed under CAS 4159-77-7, Rose Bengal lactone is an ester available from Vaqora Chemicals. The compound has the formula C20H4Cl4I4O5, corresponding to a molecular weight of 973.7 g/mol. Systematically, it is named 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one. Common synonyms include Rose Bengal and Solvent Red 141.

Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span organic synthesis and API synthesis. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Rose Bengal lactone
Catalogue No.	VQ-008938
CAS Number	4159-77-7
IUPAC name	4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular formula	C₂₀H₄Cl₄I₄O₅
Molecular weight	973.7 g/mol
Exact mass	973.4962
Grade	Reference Standard
InChIKey	IICCLYANAQEHCI-UHFFFAOYSA-N
SMILES	C1=C2C(=C(C(=C1I)O)I)OC3=C(C(=C(C=C3C24C5=C(C(=C(C(=C5Cl)Cl)Cl)Cl)C(=O)O4)I)O)I
PubChem CID	69439

Physical properties
Physical form	Other
LogP (XLogP3)	8.5
H-bond donors / acceptors	2 / 5
TPSA	76 Å²
Synonyms	Rose Bengal, 2',4',5',7'-Tetraiodo-4,5,6,7-tetrachlorofluorescein, 4,5,6,7-Tetrachloro-2',4',5',7'-tetraiodofluorescein, Solvent Red 141, C.I. Solvent Red 141, Bengal Rose B, BLUE 7, Rose bengal B, Food Red 105, C20H4Cl4I4O5, Rose Bengal RB, rose-bengal-lactone

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, 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 Rose Bengal lactone?

The CAS Registry Number of Rose Bengal lactone is 4159-77-7. It is also known as Rose Bengal, 2',4',5',7'-Tetraiodo-4,5,6,7-tetrachlorofluorescein, 4,5,6,7-Tetrachloro-2',4',5',7'-tetraiodofluorescein.

What is the molecular formula and molecular weight of Rose Bengal lactone?

Rose Bengal lactone has the molecular formula C20H4Cl4I4O5 and a molecular weight of 973.7 g/mol. Its IUPAC name is 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one.

Which grade and pack sizes of Rose Bengal lactone can I order?

We supply Rose Bengal lactone in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Rose Bengal lactone?

Yes. Every lot of Rose Bengal lactone 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 Rose Bengal lactone be shipped internationally?

Yes. Rose Bengal lactone is classified as hazardous, 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.