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Alcian yellow

Names
IUPAC name {(E)-1,2-Diazenediylbis}bis
Other names Ingrain Yellow 1
Identifiers
CAS Number	61968-76-1
3D model (JSmol)	Interactive image
ChEBI	CHEBI:87352
ChemSpider	2342179
ECHA InfoCard	100.115.894
PubChem CID	3085232
InChI InChI=1S/C40H46N8S4/c1-25-19-35-33(21-29(25)23-49-39(45(3)4)46(5)6)41-37(51-35)27-11-15-31(16-12-27)43-44-32-17-13-28(14-18-32)38-42-34-22-30(26(2)20-36(34)52-38)24-50-40(47(7)8)48(9)10/h11-22H,23-24H2,1-10H3/q+2/b44-43+Key: QMKQNEXRGZFFKQ-VGFSZAGXSA-N InChI=1/C40H46N8S4/c1-25-19-35-33(21-29(25)23-49-39(45(3)4)46(5)6)41-37(51-35)27-11-15-31(16-12-27)43-44-32-17-13-28(14-18-32)38-42-34-22-30(26(2)20-36(34)52-38)24-50-40(47(7)8)48(9)10/h11-22H,23-24H2,1-10H3/q+2/b44-43+Key: QMKQNEXRGZFFKQ-VGFSZAGXBQ
SMILES Cc1cc2c(cc1CSC(=(C)C)N(C)C)nc(s2)c3ccc(cc3)/N=N/c4ccc(cc4)c5nc6cc(c(cc6s5)C)CSC(=(C)C)N(C)C
Properties
Chemical formula	C40H46N8S4
Molar mass	767.11 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Alcian yellow is an azo dye with the formula (CH₃₂C₆H₂SNCC₆H₄)₂N₂. Its structure consists of a largely conjugated array of benzene, benzothiazole and isothiouronium units.

Histological Use

Alcian yellow is used in histology in conjunction with toluidine blue to help visualize H. pylori. The resulting structures are stained as follows:

– Mucin: yellow

– H. pylori: blue

– Other cellular components/background: shades of blue

See also

• Alcian blue stain

References

1. Leung, Jennifer K.; Gibbon, Kevin J.; Vartanian, Robert K. (1996-06-01). "Rapid Staining Method for Helicobacter Pylori in Gastric Biopsies". Journal of Histotechnology. 19 (2): 131–132. doi:10.1179/his.1996.19.2.131. ISSN 0147-8885.
2. "Helico*Stat Rapid Helicobacter Stain Kit Procedure" (PDF). Archived from the original (PDF) on 2017-03-06. Retrieved 2017-03-05.

• Azo dyes
• Benzothiazoles