Epsilon blue, indicator

About Epsilon blue, indicator

Epsilon blue, indicator is an indicator carrying the CAS registry number 84540-31-8 with a typical assay of 85%. The compound has the formula C16H11N3O9S2, corresponding to a molecular weight of 453.4 g/mol. Systematically, it is named 8-hydroxy-7-[(4-nitrophenyl)diazenyl]naphthalene-1,6-disulfonic acid.

It is supplied as dark blue to violet to deep purple powder or crystals or chunks. Literature values give a density of 1.802g/cm3. Store in a tightly closed container in a cool, dry and well-ventilated place. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Typical applications include titration end-point detection, pH determination and analytical testing. Buyers come mainly from academic and industrial research.

We offer Epsilon blue, indicator in 25 mg, 100 mg and 1 g packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Specifications & identifiers

Chemical identifiers
Product name	Epsilon blue, indicator
Catalogue No.	VQ-000353
CAS Number	84540-31-8
IUPAC name	8-hydroxy-7-[(4-nitrophenyl)diazenyl]naphthalene-1,6-disulfonic acid
Molecular formula	C₁₆H₁₁N₃O₉S₂
Molecular weight	453.4 g/mol
Exact mass	452.9937
Purity / assay	85%
HSN code	32041975
InChIKey	BKUZYERIGBKFLS-UHFFFAOYSA-N
SMILES	C1=CC2=CC(=C(C(=C2C(=C1)S(=O)(=O)O)O)N=NC3=CC=C(C=C3)[N+](=O)[O-])S(=O)(=O)O
PubChem CID	407693

Physical properties
Physical form	Crystalline
Appearance	Dark blue to violet to deep purple powder or crystals or chunks
Density	1.802g/cm3
LogP (XLogP3)	1.9
H-bond donors / acceptors	3 / 11
TPSA	216 Å²

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 Epsilon blue, indicator?

The CAS Registry Number of Epsilon blue, indicator is 84540-31-8.

What is the molecular formula and molecular weight of Epsilon blue, indicator?

Epsilon blue, indicator has the molecular formula C16H11N3O9S2 and a molecular weight of 453.4 g/mol. Its IUPAC name is 8-hydroxy-7-[(4-nitrophenyl)diazenyl]naphthalene-1,6-disulfonic acid.

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

We supply Epsilon blue, indicator in (85%) grade, in 25 mg, 100 mg, 1 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Epsilon blue, indicator?

Yes. Every lot of Epsilon blue, 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 Epsilon blue, indicator be shipped internationally?

Yes. We export Epsilon blue, indicator worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.