Allura Red AC is a red azo dye that goes by several names.[1] It is used as a food dye and has the E number E129. It is usually supplied as its dark red sodium salt, but can also be used as the calcium and potassium salts. These salts are soluble in water. In solution, its maximum absorbance lies at about 504 nm. References: Ou Y, Wang X, Lai K, Huang Y, Rasco BA, Fan Y. Gold Nanorods as Surface-Enhanced Raman Spectroscopy Substrates for Rapid and Sensitive Analysis of Allura Red and Sunset Yellow in Beverages. J Agric Food Chem. 2018 Mar 21;66(11):2954-2961. doi: 10.1021/acs.jafc.8b00007. Epub 2018 Mar 6. PubMed PMID: 29489346.

纯度：≥98%

CAS：25956-17-6