SPADNS, GR (a complexometric indicator for zi… 23647-14-5

Name: SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)
Brand: Vaqora Chemicals
SKU: VQ-000709

About SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)

Vaqora Chemicals supplies SPADNS (AR grade), a biological stain registered under CAS number 23647-14-5 with a typical assay of ≥80%. With the molecular formula C16H9N2Na3O11S3, it has a molar mass of 570.4 g/mol. Systematically, it is named trisodium, 4,5-dihydroxy-3-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate.

In its supplied form it is a brown to maroon brown to purple powder. Its solubility is described as soluble in water. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Typical applications include histology and cytology staining, microscopy, clinical laboratories and paints, coatings and inks. Typical end-use sectors are academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer SPADNS in 1 g, 5 g, 25 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Paints, coatings & inks

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)
Catalogue No.	VQ-000709
CAS Number	23647-14-5
IUPAC name	trisodium;4,5-dihydroxy-3-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate
Molecular formula	C₁₆H₉N₂Na₃O₁₁S₃
Molecular weight	570.4 g/mol
Exact mass	569.9062
Grade	AR
Purity / assay	≥80%
HSN code	29270090
InChIKey	AEHGQXKBQBMQEK-UHFFFAOYSA-K
SMILES	C1=CC(=CC=C1N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O)S(=O)(=O)[O-].[Na+].[Na+].[Na+]
PubChem CID	90221

Physical properties
Physical form	Powder
Appearance	Brown to maroon brown to purple powder
Solubility	Soluble in water
H-bond donors / acceptors	2 / 13
TPSA	262 Å²
Synonyms	Sulfanilic acid azochromotrope 2-(4-Sulfophenylazo)chromotropic acid trisodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt, Trisodium 4,5-dihydroxy-3-(4-sulphonatophenylazo)naphthalene-2,7-disulphonate, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-((4-sulfophenyl)azo)-, trisodium salt, 2(4Sulfophenylazo)chromotropic acid trisodium salt, 4,5Dihydroxy32,7naphthalenedisulfonic acid trisodium salt, 4,5Dihydroxy32,7naphthalenedisulfonic acid sodium salt (1:3), Trisodium 2(psulfophenylazo)1,8dihydroxynaphthalene3,6disulfonate, 1,8Dihydroxy2(4sulfophenylazo)naphthalene3,6disulfonic acid trisodium salt, 2(4Sulfophenylazo)1,8dihydroxy3,6napthalenedisulfonic acid trisodium salt, Trisodium 4,5dihydroxy3(4sulphonatophenylazo)naphthalene2,7disulphonate, 2,7Naphthalenedisulfonic acid, 4,5dihydroxy3((4sulfophenyl)azo), trisodium salt

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

Other grades of CAS 23647-14-5

SPADNS, extra spezial

CAS: 23647-14-5
Formula: C₁₆H₉N₂Na₃O₁₁S₃
MW: 570.4 g/mol

VQ-046640

AR

SPADNS, extra spezial, GR

CAS: 23647-14-5
Formula: C₁₆H₉N₂Na₃O₁₁S₃
MW: 570.4 g/mol

VQ-000708

Frequently asked questions

What is the CAS number of SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)?

The CAS Registry Number of SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) is 23647-14-5. It is also known as Sulfanilic acid azochromotrope 2-(4-Sulfophenylazo)chromotropic acid trisodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-sulfophenyl)azo]-, trisodium salt, Trisodium 4,5-dihydroxy-3-(4-sulphonatophenylazo)naphthalene-2,7-disulphonate.

What is the molecular formula and molecular weight of SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)?

SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) has the molecular formula C16H9N2Na3O11S3 and a molecular weight of 570.4 g/mol.

Which grade and pack sizes of SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) can I order?

We supply SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) in AR (≥80%) grade, in 1 g, 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride)?

Yes. Every lot of SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) 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 SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) be shipped internationally?

Yes. SPADNS, GR (a complexometric indicator for zirconium, thorium & fluoride) 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.