CI 45220  is a chemical compound, a synthetic dye known by the name of Acid Red 50.

It contains a xanthene core that makes the colour fluorescent.

Chemical Name: sodium;4-[3-(ethylamino)-6-ethylazaniumylidene-2,7-dimethylxanthen-9-yl]benzene-1,3-disulfonate

What it is used for and where

Cosmetics

Restricted cosmetic ingredient as  IV/73 a Relevant Item in the Annexes of the European Cosmetics Regulation 1223/2009. Substance or ingredient reported: Hydrogen 9-(2,4-disulphonatophenyl)-3,6-bis(ethylamino)-2,7-dimethylxanthylium, monosodium salt

Cosmetics - INCI Functions

Colorant. This ingredient has the function of colouring the solution in which it is inserted in a temporary, semi-permanent or permanent manner, either alone or in the presence of the complementary components added for colouring.

Safety

 It is an ingredient that has some important health-related contraindications: it should only be used in cosmetic products that have contact with the skin for a short time.

Molecular Formula  C₂₅H₂₅N₂NaO₇S₂

Molecular Weight    552.6 g/mol

CAS     5873-16-5

UNII    

EC number 227-528-6

DTXSID801014654

Synonyms: 

Acid red 50

Acid Rhodamine G