A basic dye, also known as a salt-based dye, is a salt formed from an aromatic base and an acid (organic acid, inorganic acid), that is, a salt of a colored organic base. The basic group is generally an amino group, and after forming a salt, it is a -NH 2 ·HCl salt group, and is dissolved in water to dissociate into a dye cation and an acid anion. Also known as cationic dyes. In 1856, HWperkin synthesized the world's first synthetic dye, aniline violet, which is a basic dye. Subsequent emergence of basic fuchsin (CI alkaline violet 14), alkaline blue (CI alkaline blue 9), crystal violet (CI alkaline violet 3), malachite green (CI alkaline green 4) and Luo Daming Many varieties such as (CI alkaline purple 10). The basic structural types of basic dyes are diarylmethane, triarylmethane, azo type and nitrogen-containing heterocyclic compounds (such as xanthene, oxazine and thiazine). Basic dyes have less hydrophilic groups and are therefore less soluble in water. Dissolve first with alcohol or acetic acid, then dilute with water. The basic dye is sensitive to temperature, and the dissolution and dilution temperature of the dye bath should not be too high. The basic dye has affinity with the leather with an anion charge on the surface, so it is suitable for the dyeing of vegetable tanned leather. It is mainly used for dyeing anion-bearing leather (plant tanned leather) with strong binding force. The chrome tanned leather with cations is less used because of its poor light resistance. The basic dye is a salt of an organic base which is dissociated into a pigment cation and an acid anion in a solution, and is also known as a salt-based dye. Its molecular structure generally contains primary, secondary, tertiary or nitrogen-containing heterocycles, so it is weakly cationic in acidic baths. The basic dye has strong tinting strength and bright color. However, such dyes have poor light fastness and wash fastness. It is now rarely used for coloring on fibers. Mainly used for coloring of paper, ribbon and biological materials. Dyes such as crystal violet, rhodamine and oxazine can also be used as heat sensitive dyes, pressure sensitive dyes and dye lasers.
-
Amino compound
>
-
Oxy-containing amino compound
Cycloalkylamines, aromatic monoamines, aromatic polyamines and derivatives and salts thereof
Acyclic monoamines, polyamines and their derivatives and salts
Amide compound
Sulfonic acid amino compound
-
Alcohols, phenols, phenolic compounds and derivatives
>
-
2-cycloalcohol
Halogenated, sulfonated, nitrated or nitrosated derivatives of alcohols
Extremely halogenated, sulfonated, nitrated or nitrosated derivatives of phenols
Phenol and its halogenated, sulfonated, nitrated or nitrosated derivatives
Acyclic alcohol
-
Nitrogen-containing compound
-
-
Nitrile compound
-
-
Organic derivative of hydrazine or hydrazine
-
-
Terpenoid
-
-
Ether compounds and their derivatives
>
-
Ether, ether alcohol
Halogenation, sulfonation, nitration or nitrosation of ethers, ether alcohols, ether phenols
-
Aldehyde
-
-
Carboxylic compounds and derivatives
>
-
Cyclic carboxylic acid
Halogenation, sulfonation, nitration or nitrosation of carboxylic acids
Halogenation, sulfonation, nitration or nitration of carboxylic anhydrides
Carboxylic acid halide
Carboxylic esters and their derivatives
Salt of carboxylic acid ester and its derivatives
Acyclic carboxylic acid
-
Hydrocarbon compounds and their derivatives
>
-
Aromatic hydrocarbon
Cyclic hydrocarbon
Hydrocarbon sulfonate
Hydrocarbon halide
Hydrocarbon nitrite
Acyclic hydrocarbon
-
Ketone compound
-
-
Alkyl ureas and their derivatives and salts
-
-
Inorganic acid ester
-
-
Heterocyclic compound
-
-
Diazo, azo or azo compound
-
-
Organosilicon compound
-
-
Organometallic compound
>
-
Organic palladium
Organic germanium, cobalt, strontium, barium, gallium, germanium, germanium, germanium, germanium, etc.
Organic calcium
Zirconium
Organic potassium
Organic
Organic lithium
Organic
Organic aluminum
Organotin
Organic manganese
Organic sodium
Organic nickel
Organic titanium
Organic iron
Organic copper
Organotin
Organic zinc
Organic
Organic
Organic germanium, mercury, silver, platinum, etc.
Organic germanium, antimony, bismuth, tungsten, antimony, bismuth, lead, vanadium, molybdenum, chromium, antimony, etc.
-
Organic sulfur compound
-
-
Organic phosphine compound
-
-
Organometallic salt
-
-
Organic fluorine compound
>
-
Fluorobenzoic acid series
Fluorobenzonitrile series
Fluorobenzaldehyde series
Fluorobenzyl alcohol series
Fluoroanisole series
Fluoroaniline series
Fluorophenylacetic acid series
Fluorophenol series
Fluorobenzoic acid series
Fluoronitrobenzene series
Fluoropyridine series
Potassium fluoroborate series
Fluorobenzyl alcohol series
Fluorotoluene series
Fluorine red series
Fluoroethane series
Fluoropropane series