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Common color reagent and preparation method in chemical experiment

Are you still upset that the compound does not develop color and the product is difficult to determine? Today, the editor takes you into the magic world of color developers to present colors for your experiments.

Method for directly producing water-soluble nigrosine

The present invention relates to the preparation of azine acid dyes, in particular to a method for directly producing water-soluble nigrosine.

Stain -- preparation of drug reagents commonly used in microbiological experiments

Formula one Qi (Ziehl) Carbolic acid magenta dye solution Take 5g of carbolic acid and dissolve it in 95 ml of distilled water. Take 0.3g of basic fuchsin in liquid B, grind it in a mortar, gradually add 10 ml of 95% alcohol, and continue to submerge to dissolve it.

Alcohol soluble black dye, oil soluble black for ink film insulating oil indicator

Melanin aniline black is used for all kinds of gel pen ink, insulating oil insulating coating, black PET film, black PI film, black marker pen, indicator, chip epoxy plastic package, black phenolic resin, ink, PA6/PA66 plastic, leather PU highlight black paste, etc. Aniline black, also known as alcohol soluble aniline black (alcohol soluble black soluble in ethanol, etc.), oil soluble aniline black (oil soluble black soluble in benzene, toluene, oleic acid, etc.), melanin, solvent black. Other names: oil soluble black, niglosin, oil black, alcohol soluble black, transparent black, alcohol soluble black pigment. CI index number: 50415.

Characteristics and Application of Aniline Black

Nigrosine is an organic synthetic dye, chemical name is N-aniline -4-azo -2-naphthalene sulfonate, molecular formula is C16H14N4O3S, relative molecular mass is 354.37. It is a black crystalline powder, soluble in water and ethanol. Nigrosine has a series of unique characteristics and a wide range of applications.