The Synthesis of Azo Dyes
Azo dyes are prepared in a two step reaction the first being the synthesis of an aromatic diazonium ion from an aniline derivative. The next step is coupling
Metal salt azo pigments
Structurally they may be considered as being derived from sodium salts of anionic azo dyes containing sulphonate and ? or carboxylate groups by replacement of
opinion of the sccnfp on the safety review of the use of certain azo
The safety of these four azo-dyes has been questioned. The rationale for this review is on the basis that these colorants form carcinogenic amines during
Azo (Hydrazone) pigments: general principles
lying the structures synthesis and technical performance of azo pigments
Les colorants textiles sources de contamination de leau
dyes are released into the environment in effluents. More than 800000 tons of dyes are annually produced worldwide
CLASS ASSESSMENT APPROACH ON THE AROMATIC AZO- AND
Les colorants azoïques à base de benzidine et les amines aromatiques désignés Accès : www.gazette.gc.ca/archives/p3/1999/g3-02203.pdf. Canada. 2000.
Survey of azo-colorants in Denmark:
of azo dyes. • Physico-chemical properties toxicity
Nano-dispersible azo pigments from lignin: a new synthetic
Originality/value – Lignin-based azo pigment has great potential to replace metal oxide pigment and provide strategy for utilisation of lingo- cellulosic
dmt Dermatoses professionnelles aux colorants
du textile et des colorants où la prévalence est net- tement plus faible. pements chromophores azo (-N=N-) permettant l'as- ... 156_en.pdf).
KINETIC BEHAVIOR OF SOME AZO DYES DECOLORIZATION BY
19 In general the rate constant of the azo dye decolorization increases until a certain. TiO2 concentration and decreases due to the agglomeration of these.
[PDF] azo violet synthesis mechanism
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