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Why azo dyes are resticted for textile dyeing printing?
The azo dyes that are restricted for textile use have been so restricted because they cause skin hypersensitivity and allergies. Not all azo dyes are so restricted--there are eleven azo dyes that are approved for use in food.
Mechanism of azo dye Para Red synthesis?
Azo food dyes don't set off allergic reactions as such, though some azo textile dyes can cause your skin to be hypersensitive. The mechanism for why tartrazine increases allergic reactions is not yet known.
Would water be a suiable solvent for every dye?
-Cationic dyes (basic dyes) are soluble in polar solvents such as water, alcohols -Nonionic Fat-soluble dyes line metal-free azo and anthraquinone dyes are soluble in aromatic and aliphatic hydrocarbons. -Metal-complex dyes are normally soluble in alcohols, ketones, glycoethers
Difference between biodeterioration and biodegradation?
The main differences between biodeterioration and biodegradation are the undesirability and uncontrollability of the former
What azo dye is formed when salicylic acid reacts with amino benzoinc acid?
3,4'-dicarboxy-4-hydroxy azo benzene.it is a coupling reaction...........it forms a azo dye.when salicylic acid reacts with amino benzoinc acid.. initially amino benzoinc acidreacts with nitrous acid and hydrochloric acid to form azo group....azo group: -N=N-then that azo compound react with salicylic acid to form an azo dye(3,4'-dicarboxy-4-hydroxy azo benzene).C6H4COOH(OH)-salicylic acidCH2NC6H4CO2H- amino benzoinc acid.H2NC6H4CO2H+HNO2+HCL-->CL-N=N-C6H4COOH(AZO COMPOUND)3,4'-dicarboxy-4-hydroxy azo benzene.(AZO DYE)
What are the raw material for manufacture of azo dyes?
What are the raw material used to manufacture azo dyes
Why azo dyes are resticted for textile dyeing printing?
The azo dyes that are restricted for textile use have been so restricted because they cause skin hypersensitivity and allergies. Not all azo dyes are so restricted--there are eleven azo dyes that are approved for use in food.
What is an azo dye?
An azo dye is any of a number of yellow to red synthetic dyes which contain an azo or diimide functional group.
What do you mean by restricted azo dye?
restricted of azo dye means the use of azo dye is restricted by the authority/government/organisation.but there are eleven azo dyes are approved for use in food.
What has the author William Robert Waldron written?
William Robert Waldron has written: 'The influence of sulphur on the color of azo dyes ..' -- subject(s): Sulphur, Dyes and dyeing, Chemistry, Azo compounds
What is an azobenzene?
An azobenzene is an aromatic azo compound, which is the basis of many dyes.
What has the author Glenn M Shaul written?
Glenn M. Shaul has written: 'Fate of water soluble azo dyes in the activated sludge process' -- subject(s): Azo dyes, Hazardous wastes, Toxicology
Mechanism of azo dye Para Red synthesis?
Azo food dyes don't set off allergic reactions as such, though some azo textile dyes can cause your skin to be hypersensitive. The mechanism for why tartrazine increases allergic reactions is not yet known.
What is an azo compound?
An azo compound is an organic compound of general formula R-N=N-R1, often coloured and the basis of synthetic dyes.
What is azo dye test?
Azo dye test is the chemical test to identify the release of banned amines from any nitrogen based azo -synthetic dyes . There is a limit of 30 ppm for the banned amines in any textile or leather article which may come in contact with skin
Would water be a suiable solvent for every dye?
-Cationic dyes (basic dyes) are soluble in polar solvents such as water, alcohols -Nonionic Fat-soluble dyes line metal-free azo and anthraquinone dyes are soluble in aromatic and aliphatic hydrocarbons. -Metal-complex dyes are normally soluble in alcohols, ketones, glycoethers
What has the author Lisinka Martina Gina Jansen written?
Lisinka Martina Gina Jansen has written: 'Photochemistry and photophysics of azo dyes'
