Aluminon (CAS: 569-58-4)

Performance specification

Yellow brown or brownish red powder,Soluble in water, slightly soluble in ethanol, almost insoluble in ethyl ether, acetone and chloroform.Physical parameters: melting point: 220-225 ℃.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 withaluminum, chromium, iron, and beryllium.

Application Description 

Complexometric titration indicator,The determination of water, food and organization of aluminium,Including soft water, baking powder, mordant, pulp paper, tanned leather, paints, copper plating, clarifying agent, etc.Chromatographic analysis reagent.

Storage condition

Sealed storage

Hazard statements

Dangerous code:Xi

Danger level:R36/37/38

Security level:S26-37/36

Application

Used for determination of the aluminum, such as water, food and organization. In weak acid solution, Al³⁺ aluminum reagent reaction, generate mei red substances.

Preparation or the source

By using sodium nitrite reaction with salicylic acid in formaldehyde solution, and then pass into the ammonia process.

Other

Absorb the maximum wavelength 522 nm. With aluminum, chromium, iron, beryllium can form precipitation.

Aluminum reagent is a good indicator, metal under normal temperature for the red brown or orange red vitreous powder or granule, melting temperature range of 220-220 degrees Celsius (decomposition) at the same time.

Aluminum reagent, indium with aluminum ions, iron ions and lanthanide and red to purple trivalent ions to form complexes.

Aluminum reagent solution (0.5 g/L) :

Weigh and aluminum reagent and 0.25 g 0.25 g gum Arabic, add 250 ml water, warm to dissolves,Weigh and aluminum reagent and 0.25 g 0.25 g gum Arabic, add 250 ml water, warm to dissolves.Filter if necessary. Using the solution is valid for one month.