AVAILABLE TO ORDER
GRADE & PURITY Biological Stain ? Biological stain grade — dyes characterized for staining cells and tissues. Use in histology and microscopy where staining consistency matters.
Synonyms
EINECS 226-541-4 | BISMARK BROWN 53 | 1HAD3F3XM9 | 5,5'-[(4-Methyl-m-phenylene)bis(azo)]bis[toluene-2,4-diamine] dihydrochloride | Bismarck Brown R, for microscopy (Bact., Hist.) | C.I. Basic Brown 4, dihydrochloride | BISMARK BROWN R [MI] | UNII-1HAD3F3X
Storage
Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
25g
B106031-25g
3
$9.90
100g
B106031-100g
2
$21.90
500g
B106031-500g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$23.90
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Specifications

Synonyms
EINECS 226-541-4 | BISMARK BROWN 53 | 1HAD3F3XM9 | 5, 5'-[(4-Methyl-m-phenylene)bis(azo)]bis[toluene-2, 4-diamine] dihydrochloride | Bismarck Brown R, for microscopy (Bact., Hist.) | C.I. Basic Brown 4, dihydrochloride | BISMARK BROWN R [MI] | UNII-1HAD3F3X
Specifications & Purity
Biological stain
Storage
Room temperature
Shipped In
Normal
Grade
Biological Stain
Names and Identifiers
Pubchem Sid488185732
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488185732
Canonical SmilesCC1=C(C=C(C=C1)N=NC2=C(C=C(C(=C2)C)N)N)N=NC3=C(C=C(C(=C3)C)N)N.Cl.Cl
IUPAC Name4-[[3-[(2,4-diamino-5-methylphenyl)diazenyl]-4-methylphenyl]diazenyl]-6-methylbenzene-1,3-diamine;dihydrochloride
InChIKeyWLKAMFOFXYCYDK-UHFFFAOYSA-N
INCHI1S/C21H24N8.2ClH/c1-11-4-5-14(26-28-20-6-12(2)15(22)9-17(20)24)8-19(11)27-29-21-7-13(3)16(23)10-18(21)25;;/h4-10H,22-25H2,1-3H3;2*1H
Isomeric SMILES CC1=C(C=C(C=C1)N=NC2=C(C=C(C(=C2)C)N)N)N=NC3=C(C=C(C(=C3)C)N)N.Cl.Cl
WGK Germany 3
PubChem CID 79459
Molecular Weight 461.39
Beilstein 1829673

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.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassAzobenzenes
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentAzobenzenes
Alternative Parents Aniline and substituted anilines  Aminotoluenes  Azo compounds  Propargyl-type 1,3-dipolar organic compounds  Primary amines  Organic zwitterions  Organic chloride salts  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents Azobenzene - Aminotoluene - Aniline or substituted anilines - Toluene - Monocyclic benzene moiety - Benzenoid - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organic zwitterion - Hydrocarbon derivative - Organic nitrogen compound - Primary amine - Organonitrogen compound - Amine - Organic salt - Organic chloride salt - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as azobenzenes. These are organonitrogen aromatic compounds that contain a central azo group, where each nitrogen atom is conjugated to a 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.

9 results found

Lot NumberCertificate TypeDateItem
E2627597Certificate of AnalysisApr 23, 2026 B106031
E2627600Certificate of AnalysisApr 23, 2026 B106031
L2109409Certificate of AnalysisSep 09, 2025 B106031
L2109410Certificate of AnalysisSep 09, 2025 B106031
L2109500Certificate of AnalysisSep 09, 2025 B106031
L2109503Certificate of AnalysisSep 09, 2025 B106031
H2006095Certificate of AnalysisMay 09, 2024 B106031
I1501072Certificate of AnalysisMay 06, 2023 B106031
B2317073Certificate of AnalysisFeb 22, 2023 B106031
Chemical and Physical Properties
Melt Point(°C)222°C
Molecular Weight461.400 g/mol
XLogP3
Hydrogen Bond Donor Count6
Hydrogen Bond Acceptor Count8
Rotatable Bond Count4
Exact Mass460.166 Da
Monoisotopic Mass460.166 Da
Topological Polar Surface Area154.000 Ų
Heavy Atom Count31
Formal Charge0
Complexity581.000
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
Documents & Articles
References
1. Yusen Meng, Yuqing Qiao, Haifeng Zhou, Jingye Li, Bowu Zhang.  (2022)  A promising scalable route to construct GO-based laminate membranes for antifouling ultrafiltration.  Materials Advances,  (10): (4369-4380).  [PMID:] [10.1039/D1MA01111A]
2. Jingting Su, Hui Lu, Fang Wang, Yu Lu, Ruohu Zhang, Jun Xiao, Yiping Cui, Li Zhu.  (2021)  High-efficient, broad-spectrum and recyclable mesoporous TiO2 adsorbent for water treatment.  MICROPOROUS AND MESOPOROUS MATERIALS,      [PMID:] [10.1016/j.micromeso.2021.111345]
3. Jingting Su, Junyi Xia, Huijun Liang, Jun Xiao, Ruohu Zhang, Shuhong Xu, Li Zhu.  (2024)  Advanced quasi-2D amorphous TiOx-Au photocatalyst: Harnessing defects and carriers transport to boost visible-light organic pollutants degradation.  Surfaces and Interfaces,      [PMID:] [10.1016/j.surfin.2024.103871]
4. Lingli Zhang, Yilin Yu, Xinyi Zhu, Liping Song, Yu Zhao, Lei Jiang, Xiaoyu Zhao, Bihu Lv, Yixuan Sun, Youju Huang.  (2024)  Tailorable janus plasmonic SERS platform with hotspots integrating and analytes enriching property for multiple sensing.  SENSORS AND ACTUATORS B-CHEMICAL,      [PMID:] [10.1016/j.snb.2024.135721]
Solution Calculators
Reviews

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