Aluminon the triammonium salt of aurintricarboxylic acid is a dye commonly used to detect the presence of the aluminium ion in an aqueous solution. In addition to its use in qualitative inorganic analysis aluminon has applications in pigment production. It forms brilliantly colored lake pigments with aluminum chromium iron and beryllium.

For R&D use onlynot for drug household or other uses.

Aluminon is prepared by reacting sodium nitrite with salicylic acid adding formaldehyde then treating with ammonia.