An anionic hexasulfonic acid dye
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Direct Red 80

Item No. 39535

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
7,7′-(carbonyldiimino)bis[4-hydroxy-3-[2-[2-sulfo-4-[2-(4-sulfophenyl)phenyl]diazenyl]-2-naphthalenesulfonic acid, hexasodium salt
CAS Number
2610-10-8
Synonyms
  • C.I. 35780
  • Sirius Red
  • Sirius Red F3B
Molecular Formula
C45H26N10O21S6 • 6Na
Formula Weight
1373.1
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
DMF: Slightly SolubleDMSO: Slightly SolublePBS (pH 7.2): 10 mg/ml
λmax
280, 528 nm
SMILES
OC(C(C=CC(NC(NC1=CC(C=C2[S](=O)([O-])=O)=C(C(O)=C2N=NC(C=CC(N=NC(C=C3)=CC=C3[S](=O)([O-])=O)=C4)=C4[S](=O)([O-])=O)C=C1)=O)=C5)=C5C=C6[S](=O)([O-])=O)=C6N=NC(C=CC(N=NC(C=C7)=CC=C7[S](=O)([O-])=O)=C8)=C8[S](=O)([O-])=O.[Na+].[Na+].[Na+].[Na+].[Na+].[Na+]
InChi Code
InChI=1S/C45H32N10O21S6.6Na/c56-43-33-13-5-27(17-23(33)19-39(81(71,72)73)41(43)54-52-35-15-7-29(21-37(35)79(65,66)67)50-48-25-1-9-31(10-2-25)77(59,60)61)46-45(58)47-28-6-14-34-24(18-28)20-40(82(74,75)76)42(44(34)57)55-53-36-16-8-30(22-38(36)80(68,69)70)51-49-26-3-11-32(12-4-26)78(62,63)64;;;;;;/h1-22,56-57H,(H2,46,47,58)(H,59,60,61)(H,62,63,64)(H,65,66,67)(H,68,69,70)(H,71,72,73)(H,74,75,76);;;;;;/q;6*+1/p-6
InChi Key
YIQKLZYTHXTDDT-UHFFFAOYSA-H
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    5 g

    $28

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    10 g

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    25 g

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    Product Description

    Direct red 80 is an anionic hexasulfonic acid dye.1 It displays an absorbance maximum of 540 nm. Direct red 80 has been used as a crosslinking dye for collagen or amyloids, as well as a dye for fabrics.1,2

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Junqueira, L.C., Bignolas, G., and Brentani, R.R. Picrosirius staining plus polarization microscopy, a specific method for collagen detection in tissue sections. Histochem. J. 11(4), 447-455 (1979).

    2. Dapson, R.W., Fagan, C., Kiernan, J.A., et al. Certification procedures for sirius red F3B (CI 35780, direct red 80). Biotech. Histochem. 86(3), 133-139 (2011).