≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Desiccated,Room temperature Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 8 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Sudan red 7B, also known as fat red, is a non-fluorescent stain. It is effectively used to stain lipids and is used to indicate the presence of suberin in cell walls. Sudan red 7B acts as a marker for formosan subterranean termite, Coptotermes fornosanus Shiraki.
Sudan Red 7B has been used to stain the fat bodies of Ostrinia nubilalis (Hübner) larvae.
| Pubchem Sid | 488183492 |
|---|---|
| Canonical Smiles | CCNC1=C(C2=CC=CC=C2C=C1)N=NC3=CC=C(C=C3)N=NC4=CC=CC=C4 |
| IUPAC Name | N-ethyl-1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-amine |
| InChIKey | VKWNTWQXVLKCSG-UHFFFAOYSA-N |
| INCHI | 1S/C24H21N5/c1-2-25-23-17-12-18-8-6-7-11-22(18)24(23)29-28-21-15-13-20(14-16-21)27-26-19-9-4-3-5-10-19/h3-17,25H,2H2,1H3 |
| Isomeric SMILES | CCNC1=C(C2=CC=CC=C2C=C1)N=NC3=CC=C(C=C3)N=NC4=CC=CC=C4 |
| WGK Germany | 3 |
| RTECS | QM2850000 |
| PubChem CID | 61396 |
| Molecular Weight | 379.46 |
| Beilstein | 3534323 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organoheterocyclic compounds |
| Class | Azobenzenes |
| Subclass | Not available |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Azobenzenes |
| Alternative Parents | Naphthalenes Secondary alkylarylamines Benzene and substituted derivatives Azo compounds Propargyl-type 1,3-dipolar organic compounds Hydrocarbon derivatives |
| Molecular Framework | Aromatic homopolycyclic compounds |
| Substituents | Azobenzene - Naphthalene - Secondary aliphatic/aromatic amine - Benzenoid - Monocyclic benzene moiety - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Secondary amine - Organic nitrogen compound - Hydrocarbon derivative - Organonitrogen compound - Amine - Aromatic homopolycyclic compound |
| Description | This 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 |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 K2105196 | Certificate of Analysis | Aug 12, 2025 | S104544 |
| K2105200 | Certificate of Analysis | Aug 12, 2025 | S104544 |
| K1911168 | Certificate of Analysis | Aug 11, 2023 | S104544 |
| D23261127 | Certificate of Analysis | Mar 03, 2021 | S104544 |
| Melt Point(°C) | 130°C |
|---|---|
| Molecular Weight | 379.500 g/mol |
| XLogP3 | 7.100 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 6 |
| Exact Mass | 379.18 Da |
| Monoisotopic Mass | 379.18 Da |
| Topological Polar Surface Area | 61.500 Ų |
| Heavy Atom Count | 29 |
| Formal Charge | 0 |
| Complexity | 533.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
| 1. Ming-Yue Dong, Hai-Long Wu, Wan-Jun Long, Tong Wang, Ru-Qin Yu. (2021) Simultaneous and rapid screening and determination of twelve azo dyes illegally added into food products by using chemometrics-assisted HPLC-DAD strategy. MICROCHEMICAL JOURNAL, [PMID:] [10.1016/j.microc.2021.106775] |
| 2. Peng Li, Dongting Huang, Junsheng Huang, Jingjie Tang, Pingjun Zhang, Fei Meng. (2020) Development of magnetic porous carbon nano-fibers for application as adsorbents in the enrichment of trace Sudan dyes in foodstuffs. JOURNAL OF CHROMATOGRAPHY A, [PMID:32709348] [10.1016/j.chroma.2020.461305] |
| 3. Wenhua Ji, Mingming Zhang, Tao Wang, Xiao Wang, Zhenjia Zheng, Junjie Gong. (2016) Molecularly imprinted solid-phase extraction method based on SH-Au modified silica gel for the detection of six Sudan dyes in chili powder samples. TALANTA, [PMID:28153239] [10.1016/j.talanta.2016.12.021] |
| 4. Chengjiang Zhang, Gongke Li, Zhuomin Zhang. (2015) A hydrazone covalent organic polymer based micro-solid phase extraction for online analysis of trace Sudan dyes in food samples. JOURNAL OF CHROMATOGRAPHY A, [PMID:26456513] [10.1016/j.chroma.2015.09.059] |
| 5. Hua Huang, Xuemei He, Qingming Sun, Guoming Liu, Yayuan Tang, Jian Sun. (2024) Differential changes in cuticular wax affect the susceptibility to fruit decay in pitaya after harvest: A cultivar comparative study. POSTHARVEST BIOLOGY AND TECHNOLOGY, [PMID:] [10.1016/j.postharvbio.2023.112751] |
| 6. Shaobo Zhang, Shulei Pang, Li Jiang, Dan Zhao, Yan Yuan, Yi Li, Yanmao Dong. (2024) Poly(vinylidene fluoride) membrane design for efficient oil-in-water emulsion separation: Integrating superhydrophilicity, photocatalysis and self-cleaning. APPLIED SURFACE SCIENCE, [PMID:] [10.1016/j.apsusc.2024.160948] |
| 7. Rui Wang, Yimin Tang, Yanan Lu, Zhiyu Wang, Xin Jiang, Bing Zhao, Libin Yang. (2025) 3D/1D MoS2 flower-like microspheres@Au nanowires heterojunction SERS platform with all components simultaneously & synergically contributing to each enhancement effect of electromagnetic and chemical mechanisms. SENSORS AND ACTUATORS B-CHEMICAL, [PMID:] [10.1016/j.snb.2025.139193] |
| 8. Hua Huang, Genlin Mao, Dongjie Liu, Shenghua Ding. (2025) Chemical composition and heterogeneous distribution of surface lipids modulate cuticular barrier properties to fruit water loss of Sanhua plum (Prunus salicina L.). POSTHARVEST BIOLOGY AND TECHNOLOGY, [PMID:] [10.1016/j.postharvbio.2025.113856] |
