Last edited by Kazil
Tuesday, July 21, 2020 | History

3 edition of Azo dyes found in the catalog.

Azo dyes

Alan W. Burg

Azo dyes

evaluation of data relevant of human health and environmental safety : report to the Dyes Environmental and Toxicology Organization, Inc.

by Alan W. Burg

  • 262 Want to read
  • 1 Currently reading

Published by A.D. Little in [Cambridge, Mass.] .
Written in English

    Subjects:
  • Azo dyes -- Toxicology.,
  • Dimethylaminoazobenzene -- Toxicology.,
  • Azo dyes -- Environmental aspects.

  • Edition Notes

    Statementby Alan W. Burg and Maria C. Charest.
    ContributionsCharest, Maria C., Dyes Environmental and Toxicology Organization.
    Classifications
    LC ClassificationsRA1242.A94 B87
    The Physical Object
    Pagination232 p. :
    Number of Pages232
    ID Numbers
    Open LibraryOL4166782M
    LC Control Number80148941

      Source: PAC, , 67, (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations )) on page [] []. Azo dyes are widely used in the food, pharmaceutical, cosmetic, textile, and leather industries. They are synthetic compounds characterized by one (monoazo) or several intramolecular NQN bonds. Azo dyes, if they are systemically absorbed, can be metabolized via azoreductases of intestinal microflora by liver cells and skin surface bacteria. This metabolism leads to aromatic amines that can be.

    Dyes "azo" are the most important chemical class of dyes and colorants in the textile industry, while 70% of organic dyes on the market. Are used to color natural and synthetic fibers, food, candy, cosmetics and beverages. Dyes "azo" dyes are divided into soluble and insoluble pigments, soluble in turn water-soluble and fat soluble. As a consequence of п-delocalization, aryl azo compounds have vivid colors, especially reds, oranges, and ore, they are used as dyes, and are commonly known as azo dyes, an example of which is Disperse Orange azo compounds, e.g., methyl orange, are used as acid-base indicators due to the different colors of their acid and salt forms.

    The azo dyes, the triphenylmethane dyes, and mauve are all synthesized from the anilines (Aniline, o-, m-, and p-toluidine) and aromatic substances (benzene, naphthalene and anthracene). All of these substances can be found in coal tar, a crude material that is obtained by distilling coal. Perkin’s discovery led to the formation of a. Many azo dyes, like Sudan red and scarlet red, can be used as biological dyes because they are fat- soluble and can be absorbed into fat cell tissues on microscope slides. Azo dyes form % of all synthetic dyes used as commercial colorants. Azo dyes have several advantages over other.


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Azo dyes by Alan W. Burg Download PDF EPUB FB2

Biodegradation of Azo Dyes (The Handbook of Environmental Chemistry) th Edition by Hatice Atacag Erkurt (Editor)Format: Hardcover.

About this book Azo dyes play an important role as coloring agents in the textile, food, and pharmaceutical industry. Due to the toxicity, mutagenicity and carcinogenicity of azo dyes and their breakdown products, their removal from industrial wastewaters has been an urgent challenge.

Biodegradation Azo dyes book Azo Dyes (The Handbook of Environmental Chemistry 9) - Kindle edition by Atacag Erkurt, Hatice.

Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Biodegradation of Azo Dyes (The Handbook of Environmental Chemistry 9).Manufacturer: Springer. This book presents comprehensive information on the respective synthetic organic dyes.

In this regard, a variety of dyes, including anthraquinones, aryl amines, azo dyes, BODIPY, carbazoles, cyanines, fluoresceins, oxazines, phenothiazines, rhodamines, squaraines, thiophene dyes, etc., were collected and discussed. Part of the Studies in Modern Chemistry book series (SMC) Abstract Many methods are available for preparing azo compounds, but manufacture of azo dyes is always based on the coupling of diazonium compounds with phenols, naphthols, arylamines, pyrazolones or other suitable components to give hydroxyazo or aminoazo compounds or their tautomeric by: The chemistry of direct dyes belonging to azo, azine, copperphthalocyanine and other classes are discussed.

Chemistry of benzidine-free direct dyes and after-treatment dyes is also discussed. Select 13 - Metal-complex dyes Book chapter Full text access.

Full Text; PDF ( K) PDF-Plus ( K) Citing articles; Azo dyes: past, present and the future. Amit Bafana, a Sivanesan Saravana Devi, b Tapan Chakrabarti b a Biotechnology Division, Institute of Himalayan Bioresource Technology (IHBT), Council of Azo dyes book and Industrial Research (CSIR), Palampur b Sivanesan Saravana Devi, and Tapan Chakrabarti: National.

Synthetic azo dyes are widely used in industries. Gerhardt Domagk discovered that the antimicrobial effect of red azo dye Prontosil was due to the reductively cleaved (azo reduction) product. Azo dyes make up 60–70% of all dyes used and are the most important chemical class of dyes.

Many of the dyes used on cotton are azo dyes (e.g., fiber reactive, direct, azoic). Some azo dyes, if absorbed by the human body, can undergo reduction decomposition to form carcinogenic amines due to enzymes in the body that have reduction properties.

Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually are a commercially important family of azo compounds, i.e. compounds containing the linkage C-N=N-C. Azo dyes are widely used to treat textiles, leather articles, and some ally related to azo dyes are azo pigments, which are insoluble in water and other solvents.

The NICNAS IMAP program has referred for possible listing in Schedule 7, a number of azo dyes that can be reduced by azo reductases to carcinogenic components. The delegate has previously considered, and agreed to, Schedule 7 listing a number of benzidine-and benzidine-congener azo dyes.

The term azo dyes is applied to those synthetic organic colorants that are characterized by the presence of the chromophoric azo group ().This divalent group is attached to sp 2 hybridized carbon atoms: on one side, to an aromatic or heterocyclic nucleus; on the other, it may be linked to an unsaturated molecule of the carbocyclic, heterocyclic, or aliphatic type.

About this book. Azo dyes play an important role as coloring agents in the textile, food, and pharmaceutical industry.

Due to the toxicity, mutagenicity and carcinogenicity of azo dyes and their breakdown products, their removal from industrial wastewaters has been an urgent challenge.

azo dye, the “ chlorotriazine reacti ve azo red ”, by th e induc tio n of m icron ucle i in e ryth roc ytes o f fish es. Some author s [56] c onclu ded, accordi ng to studies.

This book, therefore, evaluates the biodegradability of synthetic azo dyes in anaerobic treatment system.

The work result showed that the potential application of the system using tannery sludge biomass for the treatment of azo dye containing textile and other similar industries : Abraham Mebrat Asmare. Azo dyes are dyes with -N=N- azo structure as a chromophore. Subcategories. This category has only the following subcategory.

D Diarylide pigments‎ (7 P) Pages in category "Azo dyes" The following 76 pages are in this category, out of 76 total.

Azo dyes are by far the most important class of dye, accounting for over 50% of the world annual production of c. 1 million tonnes of dyes (and pigments). Not surprisingly, azo dyes have been studied more than any other class. Therefore, azo dyes will be discussed first.

Azo dyes. An experimental system was produced with mixtures of two water-soluble azo dyes, sunset yellow and tartrazine, to show the effectiveness of the chemometric analysis run on the microvolume UV-Vis platform by Thermo Fisher Scientific.

The two dyes were selected for the experimental framework as large regions of their spectra overlap. This book provides an up-to-date insight into the chemistry behind the colour of the dyes and pigments that make our world so colourful.

The impressive breadth of coverage starts with a dip into the history of colour science. Colour Chemistry then goes on to look at the structure and synthesis of the various dyes and pigments, along with their applications in the traditional areas of textiles /5(3).

However, some azo dyes can show toxic effects, especially carcinogenic and mutagenic events [27,28]. The toxic effects of the azo dyes may result from the direct action of the agent itself or of the aryl amine derivatives generated during reductive biotransformation of the azo bond.

The azo dyes entering the body by ingestion can be. Spirit‐soluble azo dyes dissolve in polar solvents, such as alcohol and acetone, and find application in the coloring of lacquers, plastics, printing inks, and ball‐point pen inks.

Basic dyes of the azo class are the simplest and oldest known synthetic dyes. Current cationic dyes are used for modified acrylics, modified nylons, modified.Azo dyes produce bright, high-intensity colors, have fair to good fastness properties, are economical to produce and account for more than half of all commercial dyes carcinogenic aromatic amines used in producing the dyes may be released from a finished textile by perspiration or saliva, causing health risks from skin contact or ingestion.

Azo dyes are also regulated by chemical legislation including REACH, China GB Standards and California Proposition Therefore, it is the responsibility of manufacturers, brands and retailers to carry out azo dyes testing to ensure compliance for .