Brilliant black

Azo dyes Allura Red AC, Amaranth, Azorubine, Brilliant Black BN, Brown FK, Brown HT, Lithol Rubine BK, Ponceau 4R, Red 2G, Sunset Yellow, Tartrazine Triarylmethane (triphenylmethane) dyes Brilliant Blue FCF, Fast green FCF, Green S, Patent Blue V... 

Brilliant Black BN (E 151, Black PN, Cl Food Black 1) is a bis azo dye tetrasodium 4-acetamido-5-hydroxy-6-[7-sulfonato-4-(4-sulfonato-phenylazo)-l-naphthylazo]-l,7-naphtha-lene-disulfonate. The calcium and potassium salts are also permitted. It is a black powder or granules, soluble in water, sparingly soluble in ethanol, with a maximum absorption in water at 570 mn = 530). It is not... 

Azo-based dyes, known to be carcinogenic, contain easily hydrolyzed azo bonds. In the GI tract, these bonds are cleaved to yield the free aromatic amine(s) [20]. Azo reduction may also take place in the liver of humans and other mammals by reductase enzymes, but it is likely that hydrolysis in the GI tract is predominant [21]. The resultant aromatic amines are easily absorbed in the intestines. It was found that inclusion of sulfonate moieties on the aromatic amine feedstocks mitigates the toxicity, as illustrated with the azo dye Brilliant Black BN (Cl Food Black 1) in Figure 13.6. The sulfonate moieties are highly ionized in the GI tract and at environmental pHs (5-9), and their reduction products cannot penetrate the GI endothelial membranes following oral exposure. Consequently, the chemicals are poorly absorbed, and any portion that is absorbed is rapidly excreted in the urine [22, 23]. 

Figure 13.6 Brilliant Black BN (5) and its environmental or intestinal azo reduction products. The sulfonate moieties and each of its three reduction products are highly ionized in the environment and in the Cl tract, and cannot penetrate the membranes of the cells lining the intestines.

The Brilliant Black Reduction Test, Enterotox Labs., Krefeld, Germany. 

In 1989, an experimental study designed by the International Dairy Federation in 53 laboratories of 22 different countries to achieve deeper insight into state of proficiency of routinely applied tests showed that the most frequently used microbial inhibitor screening tests were the disc assays with Bacillus stearo-tliermopliilus, Delvotest-P, Brilliant black reduction test, acidification test, CHARM II test, and the Penzyme test (32), Currently available microbial inhibitor tests for screening of residual antibacterials in milk and milk products are presented in Table 27.1. 

BR-tesVAS/Blue Direct assay B. ste rothermophilus 2.5-3.5 h at Brilliant Black B Penicillinase or 36, S... 

The tetra-iodide forms small, brilliant, black crystals, having a density of 5-05 at 15° C. When heated above 100° C. it dissociates into tellurium and iodine. When dissolved in excess of iodine it appeal s probable that part of the iodide is in a bimolecular condition.6 It is unattacked by moist air, but is slowly decomposed by cold water, and on warming, hydrolysis occurs with the formation of an oxy-iodide of uncertain composition on boiling with water complete hydrolysis to hydrogen iodide is effected 7... 

Vitrain. Occurs in uniform bands up to xh inch in thickness. The bands are a brilliant black, having the luster of broken glass, and complete homogeneity. Breakage into cube-like pieces and pieces with conchoidal fractures are common. 

Brilliant black BN, black PN E 151 28440 A Tetrasodium-4-acetamido-5-hydroxy-6-[7-sulfo-4-(4-sulfo-phenylazo)-1 -naphthylazo]naphthalene-1,7-disulfonate 28 i7N2Na50 4S4 867.69 ... 

Brilliant black BN 5 Slightly soluble Excellent Fair Good Fair ... 

Vitrain macroscopic coal constituent (lithotype) that appear as brilliant black bands of uniform appearance. See also Coal. 

The European fire salamander (Salamandra salamandra) and the alpine salamander (Salamandra atra) are the only amphibians known to contain samandarine alkaloids. These are the only two species in this genus. The proposal that extracts of the brilliant black and yellow Australian myobatrachid frog Pseudophryne corroboree contained samandarine alkaloids (52) has proved to be incorrect, and this and other frogs of the genus Pseudophryne instead contain pumiliotoxins and pseudophrynamines (see Sections III,C and VII, A). The major alkaloids of Salamandra salamandra are samandarine, samandarone, and 0-acetylsamandarine. There do not... 

CHROME LEATHER BLACK E CHROME LEATHER BLACK EC CHROME LEATHER BLACK EM CHROME LEATHER BLACK G CHROME LEATHER BRILLIANT BLACK ER O C.I. 30235 C.I. DIRECT BLACK 38 C.I. DIRECT BLACK 38, DISODIUM SALT ... 

E151 Brilliant Black BN 192 E300 Ascorbic Acid 48... 

Fast Violet Bluish. . Diamond Black. N hthylamine Black Brilliant Black ... 

Properties Brilliant black to blackish-red or brick-red mineral with brown to cherry-red streak and metallic to dull luster. D 4.9-53, Mohs hardness 6. Noncombustible. 

Owing to the brilliant black color of magnetite a process similar to the above one was patented in 1905 for producing printing ink (6), but it was not until the seventies with the invention of the magnetic inkjet printer that a printing process depended on the magnetic properties of the ink. 

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