Biebrich scarlet

Biebrich scarlet
Names
	IUPAC name 2-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]-5-(4-sulfophenyl)diazenyl-benzenesulfonic acid
	Other names Croceine scarlet
Identifiers
CAS Number	4196-99-0 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	4757734 ;
ECHA InfoCard	100.021.895
MeSH	Biebrich+scarlet
PubChem CID	5940755;
	InChI InChI=1S/C22H16N4O7S2/c27-20-12-5-14-3-1-2-4-18(14)22(20)26-25-19-11-8-16(13-21(19)35(31,32)33)24-23-15-6-9-17(10-7-15)34(28,29)30/h1-13,25H,(H,28,29,30)(H,31,32,33)/b24-23+,26-22- Key: VJULFVPZZZJPDJ-PUNVMFJJSA-N ; InChI=1/C22H16N4O7S2.2Na/c27-20-12-5-14-3-1-2-4-18(14)22(20)26-25-19-11-8-16(13-21(19)35(31,32)33)24-23-15-6-9-17(10-7-15)34(28,29)30;;/h1-13,27H,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2 Key: VVAVKBBTPWYADW-NUQVWONBAJ; InChI=1/C22H16N4O7S2/c27-20-12-5-14-3-1-2-4-18(14)22(20)26-25-19-11-8-16(13-21(19)35(31,32)33)24-23-15-6-9-17(10-7-15)34(28,29)30/h1-13,25H,(H,28,29,30)(H,31,32,33)/b24-23+,26-22- Key: VJULFVPZZZJPDJ-PUNVMFJJBJ;
	SMILES [Na+].[Na+].[O-]S(=O)(=O)c1ccc(cc1)/N=N/c4ccc(/N=N/c2c3ccccc3ccc2O)c(c4)S([O-])(=O)=O; O=S(=O)(O)c4ccc(/N=N/c1ccc(c(c1)S(=O)(=O)O)N/N=C2/c3ccccc3\C=C/C2=O)cc4;
Properties
Chemical formula	C22H16N4O7S2
Molar mass	512.517
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Biebrich scarlet (C.I. 26905) is a molecule used in Lillie's trichrome.^[1]

The dye was created in 1878 by the German chemist Rudolf Nietzki.^[2]

References

↑ Lillie, R. D. (1940). "Further Experiments with the Masson Trichrome Modification of Mallory's Connective Tissue Stain". Stain Technology. 15 (1). doi:10.3109/10520294009110327.
↑ Schwarz, Holm-Dietmar (1999). "Nietzki, Rudolf Hugo". Neue Deutsche Biographie (in German). 19. Retrieved 2015-10-12.

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