Chromotrope 2B - ≥97% , CAS No.548-80-1

CAS: 548-80-1 Cat. No.: C100454 Molecular Weight: 513.37 Beilstein Registry Number: 4109733 EC Number: 208-959-9
AVAILABLE TO ORDER
GRADE & PURITY ≥97%
Synonyms
2,7-NAPHTHALENEDISULFONIC ACID, 4,5-DIHYDROXY-3-(P-NITROPHENYLAZO)-, DISODIUM SALT | Acid Red 176 | C.I. Acid Red 176 (VAN) | Disodium 4,5-dihydroxy-3-(p-nitrophenylazo)naphthalene-2,7-disulphonate | disodium 3-[(4-nitrophenyl)hydrazinylidene]-5-oxidanyl-
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
1g
C100454-1g
1
$16.90
5g
C100454-5g
9
$49.90
25g
C100454-25g
3
$185.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥97% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
2, 7-NAPHTHALENEDISULFONIC ACID, 4, 5-DIHYDROXY-3-(P-NITROPHENYLAZO)-, DISODIUM SALT | Acid Red 176 | C.I. Acid Red 176 (VAN) | Disodium 4, 5-dihydroxy-3-(p-nitrophenylazo)naphthalene-2, 7-disulphonate | disodium 3-[(4-nitrophenyl)hydrazinylidene]-5-oxidanyl-
Specifications & Purity
≥97%
Storage
Room temperature
Shipped In
Normal
Purity
≥97%
Names and Identifiers
Pubchem Sid488184129
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488184129
Canonical SmilesC1=CC(=CC=C1N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O)[N+](=O)[O-].[Na+].[Na+]
IUPAC Namedisodium;4,5-dihydroxy-3-[(4-nitrophenyl)diazenyl]naphthalene-2,7-disulfonate
InChIKeyAXUUHWJXDWBCSG-UHFFFAOYSA-L
INCHI1S/C16H11N3O10S2.2Na/c20-12-7-11(30(24,25)26)5-8-6-13(31(27,28)29)15(16(21)14(8)12)18-17-9-1-3-10(4-2-9)19(22)23;;/h1-7,20-21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2
Isomeric SMILES C1=CC(=CC=C1N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O)[N+](=O)[O-].[Na+].[Na+]
WGK Germany 3
Molecular Weight 513.37
Beilstein 4109733
Reaxy-Rn 4109733
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=4109733&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassNaphthalenes
SubclassNaphthalene sulfonic acids and derivatives
Intermediate Tree Nodes Naphthalene sulfonates
Direct Parent2-naphthalene sulfonates
Alternative Parents 2-naphthalene sulfonic acids and derivatives  Nitrobenzenes  1-sulfo,2-unsubstituted aromatic compounds  Nitroaromatic compounds  Phenoxides  Sulfonyls  Organosulfonic acids  Azo compounds  Propargyl-type 1,3-dipolar organic compounds  Organic oxoazanium compounds  Organopnictogen compounds  Organooxygen compounds  Organic sodium salts  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic homopolycyclic compounds
Substituents 2-naphthalene sulfonate - 2-naphthalene sulfonic acid or derivatives - 1-sulfo,2-unsubstituted aromatic compound - Nitrobenzene - Arylsulfonic acid or derivatives - Nitroaromatic compound - Phenoxide - Monocyclic benzene moiety - Sulfonyl - Organosulfonic acid - Organosulfonic acid or derivatives - Organic sulfonic acid or derivatives - Organic nitro compound - C-nitro compound - Azo compound - Organic alkali metal salt - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Allyl-type 1,3-dipolar organic compound - Organic oxoazanium - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organic sodium salt - Organic salt - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Aromatic homopolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as 2-naphthalene sulfonates. These are organic aromatic compounds that contain a naphthalene moiety that carries a sulfonic acid group at the 2-position. Naphthalene is a bicyclic compound that is made up of two fused benzene ring.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

13 results found

Lot NumberCertificate TypeDateItem
I2206455Certificate of AnalysisJun 15, 2026 C100454
I2206454Certificate of AnalysisJun 15, 2026 C100454
F2206327Certificate of AnalysisMar 18, 2026 C100454
I2414461Certificate of AnalysisSep 06, 2024 C100454
I2414462Certificate of AnalysisSep 06, 2024 C100454
I2414463Certificate of AnalysisSep 06, 2024 C100454
B2028062Certificate of AnalysisDec 13, 2023 C100454
C2320607Certificate of AnalysisJun 28, 2022 C100454
F2206326Certificate of AnalysisFeb 12, 2022 C100454
A2219389Certificate of AnalysisJan 08, 2022 C100454
A2219413Certificate of AnalysisJan 08, 2022 C100454
A2219430Certificate of AnalysisJan 08, 2022 C100454
A2425128Certificate of AnalysisJan 08, 2022 C100454

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Chemical and Physical Properties
SensitivityMoisture sensitive.
Melt Point(°C)300°C
Molecular Weight513.400 g/mol
XLogP3
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count12
Rotatable Bond Count2
Exact Mass512.952 Da
Monoisotopic Mass512.952 Da
Topological Polar Surface Area242.000 Ų
Heavy Atom Count33
Formal Charge0
Complexity873.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count3
Solution Calculators
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