Chemical Properties
green crystalline powder
Chemical Properties
C.I. Basic red 9 is a colorless to red crystalline
solid or green powder.
Uses
Pararosaniline Hydrochloride is a red dye used for textiles. Dyes and metabolites, Environmental Testing.
Definition
ChEBI: A hydrochloride that is the monohydrochloride of 4,4'-[(4-iminocyclohexa-2,5-dien-1-ylidene)methanediyl]dianiline. One of the major constituents of Basic fuchsin, together with rosanilin, magenta II and new fuchsin.
Preparation
commonly known as (Para Magenta, Para Rosaniline) (a) 4-(4-Aminobenzyl)benzenamineand aniline, Aniline hydrochloride, the difficulties and ferric chloride in 170 ℃ heating hours;(b) aniline,p-Methylaniline and its hydrochloride and iron, ferrous chloride or 1-Nitrobenzeneheating; (C) anilineand p-Methylanilinewas treated with arsenic oxide; (d) anilinetetrachloride carbon heat.
General Description
Colorless to red crystals or green powder.
Air & Water Reactions
Insoluble in water.
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition Basic Red 9 emits very toxic fumes of hydrogen chloride and nitrogen oxides.
Fire Hazard
Flash point data for Basic Red 9 are not available; however, Basic Red 9 is probably combustible.
Biological Activity
Basic fuchsin possesses anesthetic, bactericidal (gram-positive), and fungicidal properties.
Safety Profile
Confirmed carcinogen with experimental carcinogenic and tumorigenic data. Mildly toxic by ingestion. Mutation data reported. When heated to decomposition it emits very toxic fumes of HCl and NOx.
Synthesis
Basic magenta was prepared by synthesizing 4,4'-((4-iminocyclohexane-2,5-diene-1-idene)methylene)diphenylamine hydrochloride by air oxidation reaction in the presence of a cesium vanadate catalyst using 4,4'-diaminodiphenylmethane and aniline as raw materials in the following steps: (1) in a four-necked flask, a mixture of 4,4'-diaminodiphenylmethane and aniline was added at a weight ratio of 20:1 to obtain Mixture A. Four ports of the four-necked flask were fitted with a condenser, a water separator, a thermometer and an air introduction tube, and the flask was equipped with a stirrer. aniline in a four-necked flask at a weight ratio of 20:1 to obtain mixture A. The four ports of the four-necked flask were respectively fitted with a condenser, a water separator, a thermometer, and an air introduction tube, and the flask was equipped with a stirrer; (2) under stirring conditions, a 30% HCl solution weighing 0.77 times the weight of 4,4'-diaminodiphenylmethane was added to mixture A until it was completely dissolved, obtaining solution B; (3) solution B was added to solution B weighing 1% to 4% by weight of 4,4'-diaminodiphenylmethane as cesium vanadate catalyst to solution B to obtain solution C; (4) heating solution C to 140° C. and continuously passing air at this temperature for 5 hours until no water is generated, and product D is obtained at the end of the reaction; and (5) azeotropic distillation of the product D, removing and recovering excess aniline to obtain crude oil. The crude oil was poured out of a four-neck flask and cooled to become brittle; (6) the brittle crude oil was ground and stirred with a dilute hydrochloric acid solution to pH ≤ 1 to obtain solution E; (7) solution E was stirred continuously for 6.5 hr, and then filtered through diatomaceous earth to obtain filtrate F; (8) the pH of the filtrate F was adjusted to 5 with a 0.4 mol/L NaOH solution at 24 °C, and filtered to obtain the filter cake G; ( (9) The filter cake G was dissolved in boiling water at pH=4, cooled to room temperature and left to crystallize for 16 hours, and finally filtered to obtain the solid product basic magenta crystals in 70% yield.
Potential Exposure
Used as a dye for textiles, paper;
printing, computer and photo imaging inks, leather, and
many consumer products; as a microbiological/microscopy
stain for bacilli, including tubercle and influenza.
Carcinogenicity
Basic red 9 monohydrochloride is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity fromstudies in experimental animals.
Shipping
UN 3143 Dyes, solid, toxic, n.o.s., or dye intermediates,
solid, toxic, n.o.s., Hazard Class: 6.1; Labels:
6.1—Poisonous materials, Technical Name Required.
Properties and Applications
colourful red blue light. Slightly soluble in cold water, soluble in hot water for red, easily soluble in ethanol is cherry red. The strong sulfuric acid for yellow brown, after dilute for purple. Used in the manufacture of blue ink, also can dye tannins mordant dyeing cotton.
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Standard( Cotton )
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Light Fastness
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Persperation Fastness
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Ironing Fastness
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Soaping
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Fading
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Stain
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Fading
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Stain
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Fading
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Stain
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A
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2
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1
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1
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Incompatibilities
May be combustible; powder or liquid
may form explosive mixture with air. Incompatible with
oxidizers (chlorates, nitrates, peroxides, permanganates,
perchlorates, chlorine, bromine, fluorine, etc.); contact may
cause fires or explosions. Keep away from alkaline materials,
strong bases, strong acids, oxoacids, epoxides.
Waste Disposal
Use a licensed professional
waste disposal service to dispose of this material. Dissolve
or mix the material with a combustible solvent and burn in
a chemical incinerator equipped with an afterburner and
scrubber. All federal, state, and local environmental regulations
must be observed.
References
[1] Patent: CN105936752, 2016, A. Location in patent: Paragraph 0323 - 0333
