Acid Blue 9 (Brilliant Blue FCF)

Acid Blue 9, also known as Brilliant Blue FCF, is a triphenylmethane synthetic colorant with molecular formula C37H34N2Na2O9S3, molecular weight about 792.85 and CAS number 2650-18-2; the molecule carries sulfonate groups. It appears as reddish-purple powder or granules with a metallic luster, with an assay (dry basis) of ≥85.0%, maximum absorption at 628 nm in aqueous solution, a pH of 5.0–7.0 for a 1% aqueous solution and water-insoluble matter ≤0.2% (see specifications). The powder form is convenient for weighing and splitting, and is dissolved in a water-based system before dosing; physical figures such as loss on drying (135°C) ≤10.0%, melting point 283°C and density 0.65 g/cm³ can be reviewed item by item during selection. Arsenic, lead and heavy-metal figures are controlled against the specifications on this page; permitted uses and limits follow the current regulations of your target market, and buyers are responsible for confirming compliance.

Acid Blue 9, also known as Brilliant Blue FCF, is a triphenylmethane synthetic colorant. In industrial use it colors inks, paper and leather; in biological laboratories it serves as a gel electrophoresis tracking dye and tissue stain for research purposes. In food or cosmetics directions, whether a specific use is permitted and its limits follow the current regulations of the target market, and buyers are responsible for confirming compliance; in cosmetics it colors personal care and makeup products.

For industrial use, Acid Blue 9 colors inks, paper and leather in blue shades. Maximum absorption is 628 nm in aqueous solution and the 1% aqueous solution sits at pH 5.0–7.0 (see specifications); coloring work in these industries is mostly carried out in water-based systems, where the powder is dissolved before dosing, and figures such as water-insoluble matter ≤0.2% can be reviewed item by item against the specifications on this page. Formula levels and process conditions should be verified in the customer's own system.

In biological laboratories, Acid Blue 9 serves as a gel electrophoresis tracking dye and tissue stain. Research uses typically focus on assay (dry basis ≥85.0%) and water-insoluble matter (see specifications); the concentration and method used for tracking depend on the experimental protocol, and additional grade or specification requirements can be discussed item by item during inquiry, with batch data confirmed by our sales team.