An azo dye
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Sudan Red 7B

Item No. 33315

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
N-ethyl-1-[2-[4-(2-phenyldiazenyl)phenyl]diazenyl]-2-naphthalenamine
CAS Number
6368-72-5
Synonyms
  • C.I. 26050
  • Ceres Red 7B
  • Fat Red 7B
  • Hexatype Carmine B
  • NSC 326202
  • Solvent Red 19
Molecular Formula
C24H21N5
Formula Weight
379.5
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
DMF: 30 mg/mlDMSO: 30 mg/mlDMSO:PBS (pH 7.2) (1:1): 0.5 mg/mlEthanol: 1 mg/ml
λmax
227, 256 nm
SMILES
CCNC(C=CC1=C2C=CC=C1)=C2N=NC(C=C3)=CC=C3N=NC4=CC=CC=C4
InChi Code
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
InChi Key
VKWNTWQXVLKCSG-UHFFFAOYSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    5 g

    $45

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    10 g

    $72

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    25 g

    $135

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    50 g

    $225

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    Product Description

    Sudan red 7B is an azo dye.1 It displays an absorption maxima of 525 nm.2 Sudan red 7B has been used to stain lipids in hepatocytes and suberin lamellae in plant cell walls.3,4 It has also been included as a standard in LC-MS/MS-based protocols for the detection of banned colorants in foodstuffs.1

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Pardo, O., Yusà, V., León, N., et al. Development of a method for the analysis of seven banned azo-dyes in chilli and hot chilli food samples by pressurised liquid extraction and liquid chromatography with electrospray ionization-tandem mass spectrometry. Talanta 78(1), 178-186 (2009).

    2. Nagase, M., Matsueda, T., and Osaki, Y. Determination of Sudan III, Sudan IV and Sudan red 7B in water by high performance liquid chromatography after mixing extraction. Anal. Sci. 5(2), 157-160 (1989).

    3. Delzenne, N.M., Hernaux, N.A., and Taper, H.S. A new model of acute liver steatosis induced in rats by fasting followed by refeeding a high carbohydrate-fat free diet. Biochemical and morphological analysis. J. Hepatol. 26(4), 880-885 (1997).

    4. Brundrett, M.C., Kendrick, B., and Peterson, C.A. Efficient lipid staining in plant material with Sudan red 7B or fluorol [correction of fluoral] yellow 088 in polyethylene glycol-glycerol. Biotech. Histochem. 66(3), 111-116 (1991).