CI 71105 is a chemical compound, a synthetic dye indigoide (a particular species of blue dyes that can be extracted by natural method from plants or obtained synthetically, by chemical reaction as in this case and that is the oldest form of staining) and is also known as Vat Orange 7.

Chemical Name

• Bisbenzimidazo[2,1-b:2',1'-i]benzo[lmn][3,8]phenanthroline-8,17-dione

Chemical Industrial Synthesis Process

• Preparation of reagents. The main raw materials include indole and chloroacetic acid.
• Synthesis of intermediate. The production of CI 71105 begins with the reaction of indole with chloroacetic acid in the presence of a catalyst, forming an indolic intermediate.
• Condensation. The indolic intermediate is further condensed with specific reagents to form the bis-indolic compound that forms the base of the indigoid dye.
• Oxidation. The bis-indolic structure is oxidized to form the indigoid chromophore, which is responsible for the coloring properties of CI 71105.
• Purification. The crude CI 71105 product is purified using techniques such as crystallization, filtration, and chromatography to remove impurities and achieve a high-purity colorant.
• Stabilization. The purified CI 71105 is stabilized to ensure its stability during transportation and storage, preventing degradation and oxidation.
• Quality control. The CI 71105 undergoes rigorous quality testing to ensure it meets standards for purity, color intensity, and safety. These tests include chemical analysis, spectroscopy, and microbiological testing.

What it is used for and where

Cosmetics

Cosmetica

IRestricted cosmetic ingredient as IV/97 a Relevant Item in the Annexes of the European Cosmetics Regulation 1223/2009. Substance or ingredient reported:

• Bisbenzimidazo[2,1-b:2',1'-i]benzo[lmn][3,8]phenanthroline-8,17-dione

 It is an ingredient that makes the final product more attractive from an aesthetic point of view, but can pose a potential health risk with undesirable side effects especially when used continuously as it can be absorbed through the skin or mucous membranes.

Safety

It is an ingredient that has some important health-related contraindications: it should not come into contact with mucous membranes.

Molecular Formula  C₂₆H₁₂N₄O₂

Molecular Weight  

CAS     4424-06-0

UNII    

EC Number   224-597-4

DTXSID8025913

Synonyms: 

Vat Orange 7

Perinone