Naphthol black

Name: Naphthol black
Brand: Vaqora Chemicals
SKU: VQ-000644

About Naphthol black

Naphthol black (CAS 1064-48-8) is a biological stain offered by Vaqora Chemicals in Microscopy grade. Its molecular formula is C22H14N6Na2O9S2 and its molecular weight is 616.5 g/mol. Its systematic (IUPAC) name is disodium, 4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate. Alternative names: Buffalo Black NBR and Naphthol Blue Black.

It is supplied as a brown to black powder. Store sealed in a dry, well-ventilated location away from incompatible materials. Good laboratory practice and suitable PPE are recommended during handling.

Key uses span histology and cytology staining, microscopy, clinical laboratories and biological staining. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Standard pack sizes are 10 g, 25 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Naphthol black
Catalogue No.	VQ-000644
CAS Number	1064-48-8
IUPAC name	disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate
Molecular formula	C₂₂H₁₄N₆Na₂O₉S₂
Molecular weight	616.5 g/mol
Exact mass	616.0059
Grade	Microscopy
HSN code	32049000
InChIKey	AOMZHDJXSYHPKS-UHFFFAOYSA-L
SMILES	C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)[N+](=O)[O-])N)O.[Na+].[Na+]
PubChem CID	135442942

Physical properties
Physical form	Powder
Appearance	Brown to black powder
H-bond donors / acceptors	2 / 14
TPSA	273 Å²
Synonyms	Buffalo Black NBR, Naphthol Blue Black, Acid black 2, Amido Black 10B, C.I. Acid Black 1, Amido black, C.I. Acid Black 1, disodium salt, Acidal Black 10B, Naphthol Blue Black B, Acidal Navy Blue 3BR, Acid Blue Black, Acid Blue-Black

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 1064-48-8

Microscopy

Amido black 10B

CAS: 1064-48-8
Formula: C₂₂H₁₄N₆Na₂O₉S₂
MW: 616.5 g/mol

VQ-000467

Extra Pure

Amido black 10B, extra pure 80%

CAS: 1064-48-8
Formula: C₂₂H₁₄N₆Na₂O₉S₂
MW: 616.5 g/mol

VQ-045782

Molecular Biology

Amido black 10B, for molecular biology

CAS: 1064-48-8
Formula: C₂₂H₁₄N₆Na₂O₉S₂
MW: 616.5 g/mol

VQ-046145

LR / Spectroscopy / E…

Amido black 10B, LR, for spectroscopy, for electrophoresis

CAS: 1064-48-8
Formula: C₂₂H₁₄N₆Na₂O₉S₂
MW: 616.5 g/mol

VQ-046718

Dry

Amido black 10B, specially dried 50%

CAS: 1064-48-8
Formula: C₂₂H₁₄N₆Na₂O₉S₂
MW: 616.5 g/mol

VQ-046144

Frequently asked questions

What is the CAS number of Naphthol black?

The CAS Registry Number of Naphthol black is 1064-48-8. It is also known as Buffalo Black NBR, Naphthol Blue Black, Acid black 2.

What is the molecular formula and molecular weight of Naphthol black?

Naphthol black has the molecular formula C22H14N6Na2O9S2 and a molecular weight of 616.5 g/mol.

Which grade and pack sizes of Naphthol black can I order?

We supply Naphthol black in Microscopy grade, in 10 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Naphthol black?

Yes. Every lot of Naphthol black 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 Naphthol black be shipped internationally?

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