Cas no 85-83-6 (Sudan IV)

Sudan IV is a highly soluble azo dye used as a reference standard for colorimetric analysis. Its high molar absorptivity coefficient and strong affinity for non-polar solvents make it an ideal choice for applications requiring precise color measurement, such as in the determination of fatty acid content and iodine value of oils.
Sudan IV structure
Sudan IV structure
Product Name:Sudan IV
CAS No:85-83-6
MF:C24H20N4O
MW:380.441804885864
MDL:MFCD00003893
CID:34360
PubChem ID:24899597
Update Time:2026-01-08

Sudan IV Chemical and Physical Properties

Names and Identifiers

    • 1-((2-Methyl-4-(o-tolyldiazenyl)phenyl)diazenyl)naphthalen-2-ol
    • 1-[2-Methyl-4-(2-methylphenylazo)phenylazo]-2-naphthol
    • C.I. 26105
    • Lipid crimson
    • Scarlet Red
    • Solvent Red 24
    • scarlet R
    • 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
    • 1-((2-Methyl-4-((2-methylphenyl)azo)phenyl)azo)-2-naphthalenol
    • 1-((4-(o-tolylazo)-o-tolyl)azo)-2-naphtho
    • 1-((E)-(2-Methyl-4-[(E)-(2-methylphenyl)diazenyl]phenyl)diazenyl)-2-naphth
    • 1-(4-(o-Tolylazo)-o-tolylazo)-2-naphthol
    • 1-(4-o-tolylazo-o-tolylazo)-2-naphthol
    • 1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-2-naphthaleno
    • 2',3-Dimethyl-4-(2-hydroxynaphthylazo)azobenzene
    • 2’,3-dimethyl-4-(2-hydroxynaphthylazo)azobenzene
    • Sudan IV
    • 1-({2-Methyl-4-[(2-methylphenyl)diazenyl]-phenyl}diazenyl)-2-naphthol
    • SUDAN IV, C.I. 26105 FOR MICROSCOPY
    • AKA501
    • Biebrich scarlet Rfat solube
    • C.I. 26105
    • c.i.258
    • Fat ponceau
    • fatredb
    • Oil red Ⅳ
    • oilred3
    • oilred7
    • oilreda
    • oilredd
    • oilredf
    • o-Tolylazo-tolylazo-β-naphthol
    • solvent red percent24
    • Sudan Ⅳ
    • Sudan red BB
    • sudanp
    • Bieblich Scarlet R
    • Oil Red
    • Scharlach Red
    • Solvent Red 24
    • C.I. Solvent Red 24
    • Oil Red IV
    • Scharlachrot
    • Scarlet oil
    • Biebrich Scarlet Red
    • Oil Red 4B
    • Waxoline Red OS
    • Waxoline Red O
    • Resoform Red G
    • Hidaco Oil Red
    • Waxoline Red OM
    • Rubrum scarlatinum
    • Candle Scarlet G
    • Tertrogras Red N
    • Organol Red B
    • Lacquer Red V
    • Fat Ponceau R
    • Candle Scarlet B
    • Sudan P
    • Waxakol Red BL
    • Somalia Red IV
    • Lacquer Red VS
    • Dispersol Red PP
    • Plastoresin Red F
    • Sudan Red IV
    • Sudan Red BBA
    • Stearix Red 4B
    • Resinol Red 2B
    • Oleal Red BB
    • Calco O
    • Solvent Red 24
    • 1-[2-[2-Methyl-4-[2-(2-methylphenyl)diazenyl]phenyl]diazenyl]-2-naphthalenol (ACI)
    • 2-Naphthalenol, 1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]- (9CI)
    • 2-Naphthol, 1-(4-o-tolylazo-o-tolylazo)- (6CI)
    • C.I. Solvent Red 24 (8CI)
    • 1-(2-Methyl-4-o-tolylazo-phenylazo)-naphthalen-2-ol
    • 1-(2′-Methyl-4′-(2′′-methylphenylazo)phenylazo)-2-naphthol
    • 1-[4-(o-Tolylazo)-o-tolylazo]-2-naphthol
    • 2′,3-Dimethyl-4-(2-hydroxynaphthylazo)azobenzene
    • Aizen SOT Red 1
    • Atlasol Red 4B
    • Biebrich Scarlet BPC
    • Brasilazina Oil Red B
    • Candle Scarlet 2B
    • Ceres Red BB
    • Enial Red IV
    • Fast Oil Red B
    • Fast Red BB
    • Fat Red 2B
    • Fat Red B
    • Fat Red BB
    • Fat Red BS
    • Fat Red TS
    • Fat Soluble Dark Red
    • Grasal Brilliant Red B
    • Grasan Brilliant Red B
    • Japan Red 501
    • Medical Scarlet
    • NSC 10472
    • o-Tolueneazo-o-toluene-β-naphthol
    • o-Tolylazo-o-tolylazo-2-naphthol
    • o-Tolylazo-o-tolylazo-β-naphthol
    • Oil Red 282
    • Oil Red 2B
    • Oil Red 3
    • Oil Red 3B
    • Oil Red 47
    • Oil Red 7
    • Oil Red A
    • Oil Red APT
    • Oil Red B
    • MDL: MFCD00003893
    • Inchi: 1S/C24H20N4O/c1-16-7-3-6-10-21(16)26-25-19-12-13-22(17(2)15-19)27-28-24-20-9-5-4-8-18(20)11-14-23(24)29/h3-15,29H,1-2H3
    • InChI Key: RCTGMCJBQGBLKT-UHFFFAOYSA-N
    • SMILES: OC1C(N=NC2C(C)=CC(N=NC3C(C)=CC=CC=3)=CC=2)=C2C(C=CC=C2)=CC=1

Computed Properties

  • Exact Mass: 380.16400
  • Monoisotopic Mass: 380.164
  • Isotope Atom Count: 0
  • Hydrogen Bond Donor Count: 1
  • Hydrogen Bond Acceptor Count: 5
  • Heavy Atom Count: 29
  • Rotatable Bond Count: 4
  • Complexity: 579
  • Covalently-Bonded Unit Count: 1
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count : 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Topological Polar Surface Area: 69.7
  • Surface Charge: 0
  • Tautomer Count: 4
  • XLogP3: 6.1
  • Molecular Weight: 380.4

Experimental Properties

  • Color/Form: Dark brown powder. Odourless. It softens and agglomerates at 175 ℃, melts and decomposes at 181 ~ 188 ℃, and decomposes completely at 260 ℃
  • Density: 1.1946 (rough estimate)
  • Melting Point: 199?°C (dec.) (lit.)
  • Boiling Point: 260 oC
  • Flash Point: 424.365 °C
  • Refractive Index: 1.6000 (estimate)
  • Solubility: Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol
  • Stability/Shelf Life: Stable. Incompatible with strong oxidizing agents.
  • PSA: 69.67000
  • LogP: 7.99300
  • Merck: 8393
  • Color index: 26105
  • λmax: 520 nm, 357 nm
  • Solubility: 1g of product is soluble in 15ml of chloroform, easily soluble in benzene, soluble in oil, fat, paraffin oil, phenol, slightly soluble in ethanol and acetone, and hardly soluble in water. It is a slightly purplish red solution in alcohol or benzene. When the alcohol solution meets with sodium hydroxide, it shows a red purple color. In sulfuric acid, it shows a blue-green color. When diluted, it forms a red precipitate

Sudan IV Security Information

  • Symbol: GHS07
  • Prompt:warning
  • Signal Word:Warning
  • Hazard Statement: H315,H319
  • Warning Statement: P305+P351+P338
  • Hazardous Material transportation number:NONH for all modes of transport
  • WGK Germany:3
  • Hazard Category Code: 36/38
  • Safety Instruction: S24/25
  • RTECS:QL5775000
  • Hazardous Material Identification: Xi
  • HazardClass:IRRITANT
  • TSCA:Yes
  • Storage Condition:Store at room temperature
  • Risk Phrases:R36/38

Sudan IV Customs Data

  • HS CODE:2927000090
  • Customs Data:

    China Customs Code:

    2927000090

    Overview:

    2927000090 Other diazo compounds\Azo compounds, etc(Including azoxycompounds). VAT:17.0% Tax refund rate:9.0% Regulatory conditions:nothing MFN tariff:6.5% general tariff:30.0%

    Declaration elements:

    Product Name, component content, use to

    Summary:

    2927000090 other diazo-, azo- or azoxy-compounds.Supervision conditions:None.VAT:17.0%.Tax rebate rate:9.0%.MFN tariff:6.5%.General tariff:30.0%

Sudan IV Pricemore >>

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Sudan IV Production Method

Production Method 1

Reaction Conditions
1.1 Solvents: Ethanol ;  8 h, 180 °C
Reference
Multifunctional Carbon Dots-Based Fluorescence Detection for Sudan I, Sudan IV and Tetracycline Hydrochloride in Foods
Zhang, Min; et al, Nanomaterials, 2022, 12(23),

Sudan IV Raw materials

Sudan IV Preparation Products

Sudan IV Suppliers

Amadis Chemical Company Limited
Gold Member
Audited Supplier Audited Supplier
(CAS:85-83-6)Sudan IV
Order Number:A1205385
Stock Status:in Stock
Quantity:1kg
Purity:99%
Pricing Information Last Updated:Friday, 30 August 2024 03:41
Price ($):236.0
Suzhou Senfeida Chemical Co., Ltd
Gold Member
Audited Supplier Audited Supplier
(CAS:85-83-6)Solvent Red 24
Order Number:sfd11758
Stock Status:in Stock
Quantity:200kg
Purity:99.9%
Pricing Information Last Updated:Friday, 19 July 2024 14:36
Price ($):discuss personally
Tiancheng Chemical (Jiangsu) Co., Ltd
Gold Member
Audited Supplier Audited Supplier
(CAS:85-83-6)Sudan Ⅳ
Order Number:LE13159
Stock Status:in Stock
Quantity:25KG,200KG,1000KG
Purity:99%
Pricing Information Last Updated:Friday, 20 June 2025 12:08
Price ($):discuss personally

Sudan IV Spectrogram

1H NMR 300 MHz DMSO
1H NMR
GC-MS
GC-MS
13C NMR
13C NMR

Additional information on Sudan IV

Introduction to Sudan IV and Its Applications in Modern Research

Sudan IV, a compound with the chemical formula C20H16N2O2 and a CAS number of 85-83-6, is a widely recognized dye with significant applications in various scientific fields. This organic compound, known for its vibrant red color, has garnered considerable attention due to its unique chemical properties and versatile uses. In this comprehensive overview, we delve into the Sudan IV molecule, exploring its structural characteristics, industrial applications, and recent advancements in research that highlight its importance in contemporary scientific endeavors.

The molecular structure of Sudan IV consists of a naphthyl group linked to an azo dye moiety, which contributes to its strong chromophoric properties. This configuration allows Sudan IV to exhibit excellent solubility in organic solvents, making it highly effective in various laboratory settings. The compound's stability under different environmental conditions further enhances its utility in both analytical and synthetic chemistry.

In the realm of biological research, Sudan IV has found applications as a fluorescent marker and stain. Its ability to bind to lipids and cellular components makes it particularly useful in studying cellular structures and metabolic pathways. Recent studies have demonstrated its role in investigating lipid peroxidation processes, providing valuable insights into oxidative stress and cellular damage mechanisms. Researchers have leveraged the dye's affinity for lipid membranes to develop novel methodologies for assessing membrane fluidity and integrity.

The industrial significance of Sudan IV extends beyond the laboratory. It is employed as a dyeing agent in the textile industry, where its resistance to fading and environmental stability make it a preferred choice for certain applications. Additionally, its use as a pigment in paints and coatings has been explored due to its bright coloration and durability. These industrial applications underscore the compound's versatility and economic value.

Recent advancements in pharmaceutical research have also highlighted the potential of Sudan IV as a tool for drug delivery systems. Its ability to interact with biological membranes has been exploited to develop novel nanocarriers that enhance drug solubility and bioavailability. These innovations are particularly relevant in the context of targeted drug therapy, where efficient delivery mechanisms are crucial for therapeutic efficacy.

The environmental impact of Sudan IV has been another area of focus in recent years. While its persistence in aquatic ecosystems raises concerns about potential ecological risks, ongoing research aims to mitigate these issues through sustainable practices. Efforts are being made to develop environmentally friendly alternatives or modifications that reduce the compound's ecological footprint without compromising its beneficial properties.

The future prospects of Sudan IV in scientific research remain promising. Ongoing investigations into its molecular interactions and functional applications continue to uncover new possibilities across multiple disciplines. As synthetic chemistry advances, modifications to the Sudan IV structure may lead to derivatives with enhanced properties tailored for specific research needs.

In conclusion, Sudan IV (CAS no. 85-83-6) stands as a testament to the enduring relevance of traditional dyes in modern scientific exploration. Its multifaceted applications, from biological staining to industrial dyeing and pharmaceutical innovation, highlight its enduring value. As research progresses, the continued study of this compound promises to yield further insights that will shape future advancements in chemistry and related fields.

Recommended suppliers
Amadis Chemical Company Limited
(CAS:85-83-6)Sudan IV
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Purity:99%
Quantity:1kg
Price ($):236.0
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Suzhou Senfeida Chemical Co., Ltd
(CAS:85-83-6)Solvent Red 24
sfd11758
Purity:99.9%
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Price ($):Inquiry
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