Fluoresceine, indicator

About Fluoresceine, indicator

Fluoresceine, indicator is a biological stain carrying the CAS registry number 2321-07-5. The compound has the formula C20H12O5, corresponding to a molecular weight of 332.3 g/mol. Systematically, it is named 3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one. It is also known as Resorcinolphthalein or solvent yellow 94.

It is supplied as a powder. Literature values give a melting point of 320 °C. 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.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and biological staining. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Fluoresceine, indicator in 25 g, 100 g, 500 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Fluoresceine, indicator
Catalogue No.	VQ-000590
CAS Number	2321-07-5
IUPAC name	3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
Molecular formula	C₂₀H₁₂O₅
Molecular weight	332.3 g/mol
Exact mass	332.0685
HSN code	32049000
InChIKey	GNBHRKFJIUUOQI-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O
PubChem CID	16850

Physical properties
Physical form	Powder
Appearance	Powder
Melting point	320 °C
LogP (XLogP3)	3.4
H-bond donors / acceptors	2 / 5
TPSA	76 Å²
Synonyms	Resorcinolphthalein, solvent yellow 94, D & C yellow no. 7, angiofluor, Japan yellow 201, soap yellow, fluorescein, Yellow fluorescein, Fluorescein acid, 3,6-Fluorandiol, D&C Yellow No. 7, 3',6'-Dihydroxyfluoran

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H319Causes serious eye irritation

Precautionary statements: P264, P264 + P265, P270, P280, P301 + P317, P305 + P351 + P338, P330, P337 + P317, 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 Fluoresceine, indicator?

The CAS Registry Number of Fluoresceine, indicator is 2321-07-5. It is also known as Resorcinolphthalein, solvent yellow 94, D & C yellow no. 7.

What is the molecular formula and molecular weight of Fluoresceine, indicator?

Fluoresceine, indicator has the molecular formula C20H12O5 and a molecular weight of 332.3 g/mol. Its IUPAC name is 3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one.

Which grade and pack sizes of Fluoresceine, indicator can I order?

We supply Fluoresceine, indicator, in 25 g, 100 g, 500 g, 1 kg, 5 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Fluoresceine, indicator?

Yes. Every lot of Fluoresceine, indicator 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 Fluoresceine, indicator be shipped internationally?

Yes. Fluoresceine, indicator 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.