Description

Remastral Blue FFR (C₃₄H₁₉Cl₂N₄Na₃O₁₁S₃, CAS 1324-58-9) is a high-purity trisulfonated dye belonging to the diindolo-triphenodioxazine class. This water-soluble, deep blue synthetic dye features a complex polycyclic structure with dichloro and diethyl substituents, offering excellent stability and vivid coloration. Its trisodium salt form ensures enhanced solubility in aqueous solutions, making it ideal for precise laboratory applications. With a molecular weight of 899.86 g/mol, it is widely used in histology, textile research, and as a chromogenic probe. Each batch is rigorously tested for consistency, purity (>95%), and low heavy metal content, meeting stringent standards for scientific use.

Properties

• CAS Number: 1324-58-9
• Complexity: 2040
• IUPAC Name: trisodium;2,20-dichloro-14,32-diethyl-18,36-dioxa-4,14,22,32-tetrazanonacyclo[19.15.0.03,19.05,17.07,15.08,13.023,35.025,33.026,31]hexatriaconta-1,3,5(17),6,8,10,12,15,19,21,23(35),24,26(31),27,29,33-hexadecaene-9,12,27-trisulfonate
• InChI: InChI=1S/C34H22Cl2N4O11S3.3Na/c1-3-39-18-6-5-7-23(52(41,42)43)26(18)14-10-16-21(12-19(14)39)50-33-29(36)31-34(28(35)30(33)37-16)51-22-13-20-15(11-17(22)38-31)27-24(53(44,45)46)8-9-25(54(47,48)49)32(27)40(20)4-2;;;/h5-13H,3-4H2,1-2H3,(H,41,42,43)(H,44,45,46)(H,47,48,49);;;/q;3*+1/p-3
• InChI Key: VCTDLSMTPQUQMZ-UHFFFAOYSA-K
• Exact Mass: 893.9282592
• Molecular Formula: C34H19Cl2N4Na3O11S3
• Molecular Weight: 895.6
• SMILES: CCN1C2=C(C(=CC=C2)S(=O)(=O)[O-])C3=CC4=C(C=C31)OC5=C(C6=NC7=C(C=C8C(=C7)C9=C(C=CC(=C9N8CC)S(=O)(=O)[O-])S(=O)(=O)[O-])OC6=C(C5=N4)Cl)Cl.[Na+].[Na+].[Na+]
• Topological: 250
• Monoisotopic Mass: 893.9282592
• Synonyms: Remastral blue ffrl, 1324-58-9, trisodium;2,20-dichloro-14,32-diethyl-18,36-dioxa-4,14,22,32-tetrazanonacyclo[19.15.0.03,19.05,17.07,15.08,13.023,35.025,33.026,31]hexatriaconta-1,3,5(17),6,8,10,12,15,19,21,23(35),24,26(31),27,29,33-hexadecaene-9,12,27-trisulfonate, Diindolo[3,2-b:3′,2′-m]triphenodioxazinetrisulfonic acid,8,18-dichloro-5,15-diethyl-5,15-dihydro-, trisodium salt, C.I. Direct Blue 108, trisodium salt, VCTDLSMTPQUQMZ-UHFFFAOYSA-K

Application

Remastral Blue FFR is primarily employed as a biological stain in histopathology for highlighting connective tissues and cellular structures. Its high affinity for polysaccharides and proteins makes it valuable in textile dyeing research, particularly for studying cotton and cellulose fiber interactions. The dye’s stable chromophore is also utilized in photodynamic studies and as a tracer in membrane permeability assays.

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