Pigment red 90:1 aluminum lake is an inorganic chemical compound. A dye.

The name describes the structure of the ingredient:

• Pigment red 90:1. Refers to the specific color of the pigment. The "90:1" might indicate a specific shade or variant of this color.
• Aluminum lake. "Lakes" are insoluble pigments or dyes created by combining a soluble dye with a metallic salt, in this case, aluminum. This combination makes the dye insoluble and stable, allowing it to be used in various products without bleeding or fading.

Description of Raw Materials Used in Production.

• Pigment red 90: An organic dye used to produce the lake.
• Aluminum salts: Used to form the pigmented lake.

Step-by-step Summary of Industrial Production Process.

• Preparation of Dye. Pigment red 90 is prepared and purified.
• Lake Formation. The dye is reacted with aluminum salts in an aqueous solution.
• Precipitation. The pigment red aluminum lake forms as a solid precipitate.
• Washing and Filtration. The precipitate is washed to remove impurities and filtered.
• Drying. The lake is dried to obtain the final solid form.

Form and Color.

It appears as a fine powder with a bright red color.

What it is used for and where

Cosmetics

Colorant to avoid. 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.

Hair dyeing. It is an ingredient that adds a colouring to the hair that can be temporary, semi-permanent or permanent depending on what other ingredients are added to achieve the result. The pH for hair dyeing is generally between 9 and 10.

Safety

Aluminium can interfere with different biological processes (cellular oxidative stress, calcium metabolism, etc.), so it can induce toxic effects in different organs and systems, and the nervous system is the main target of its toxicity.

A warning should be given about the risk of aluminium intake, which cannot be ruled out as this ingredient can be found both in cosmetic products and in widely consumed foodstuffs such as bread, various baked goods (1)

Chemical name dialuminum;2-(2,4,5,7-tetrabromo-3-oxido-6-oxoxanthen-9-yl)benzoate

Molecular Formula C₆₀H₁₈Al₂Br₁₂O₁₅

CAS   15876-39-8

EC number   240-005-7

DTXSID60879810

References_____________________________________________________________________

(1) (EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS); Younes M, Aggett P, Aguilar F, Crebelli R, Dusemund B, Filipič M, Frutos MJ, Galtier P, Gott D, Gundert-Remy U, Kuhnle GG, Lambré C, Leblanc JC, Lillegaard IT, Moldeus P, Mortensen A, Oskarsson A, Stankovic I, Waalkens-Berendsen I, Wright M, Di Domenico A, van Loveren H, Giarola A, Horvath Z, Lodi F, Tard A, Woutersen RA. Re-evaluation of aluminium sulphates (E 520-523) and sodium aluminium phosphate (E 541) as food additives. EFSA J. 2018 Jul 27;16(7):e05372. doi: 10.2903/j.efsa.2018.5372.)