Alkali blue 6B /Acid Blue 119 /Nicholson blue

English name：Alkali blue 6B；Acid Blue 119；Nicholson blue；Triphenyl triaminotriphenylcarbinol sulfonic acid sodium salt；C.I.42765 

Other names: alkaline Blue 6B; Six blue light alkali dyeing sky blue; Alkaline sky blue; Alkali Blue 6B; Acid blue 119; [[4 - [hydroxybis (4-anilinophenyl) methyl] phenyl] amino] benzenesulfonic acid sodium salt; Sulfur nitrogen anthracene sky blue; Thionine blue

c37h30n3o4s = 612.72

PH discoloration range: 9.4 (blue) ～ 14.0 (red)

λ Max: 599 ～ 603nm (formaldehyde)

Burning residue: ≤ 0.3

Absorbance: ≥ 0.540 (5 mg / L, 599.0 - 603.0 nm, methanol) (calculated by dry matter)

Physicochemical properties: blue purple or blue powder. It is easily soluble in ethanol, ethylene glycol ether and ethylene glycol, and the alcohol solution is green blue. It is soluble in hot water as a blue solution, slightly soluble in ethyl acetate, benzyl alcohol, glycerol and ethyl benzoate, slightly soluble in chloroform, pyridine and dioxane, and insoluble in olive oil and cold water. Add hydrochloric acid to precipitate blue precipitate in the aqueous solution. It is a reddish brown solution in the presence of sodium hydroxide and a reddish brown solution in the presence of sulfuric acid, and blue precipitates are precipitated when diluted.

Purpose: biochemical research. Acid base indicator, used to determine the pH of petroleum. Biological staining, nitrogen analysis

Saving: RT