Brilliant Black BN

Brilliant Black BN
IUPAC name Tetrasodium (6Z)-4-acetamido-5-oxo-6-[[7-sulfonato-4-(4-sulfonatophenyl)azo-1-naphthyl]hydrazono]naphthalene-1,7-disulfonate
Other names C.I. Food Black 1; 1743 Black; Black PN; Blue Black BN; Brilliant Acid Black; C.I. 28440; Certicol Black PNW; Cilefa Black B; E 151; Edicol Supra Black BN; Hexacol Black PN; L Black 8000; Melan Black; Xylene Black F
Identifiers
CAS number	2519-30-4 Y
PubChem	5359750
Jmol-3D images	Image 1
SMILES CC(=O)NC1=C2C(=C(C=C1)S(=O)(=O)[O-])C=C(C(=NNC3=C4C=C(C=CC4=C(C=C3)N=NC5=CC=C(C=C5)S(=O)(=O)[O-])S(=O)(=O)[O-])C2=O)S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]
Properties
Molecular formula	C28H17N5Na4O14S4
Molar mass	867.68 g/mol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Brilliant Black BN, Brilliant Black PN, Brilliant Black A, Black PN, Food Black 1, Naphthol Black, C.I. Food Brown 1, or C.I. 28440, is a synthetic black diazo dye. It is soluble in water. It usually comes as tetrasodium salt. It has the appearance of solid, fine powder or granules. Calcium and potassium salts are allowed as well.

When used as a food dye, its E number is E151. It is used in food decorations and coatings, desserts, sweets, ice cream, mustard, red fruit jams, soft drinks, flavored milk drinks, fish paste, lumpfish caviar and other foods.

It appears to cause allergic or intolerance reactions, particularly amongst those with an aspirin intolerance. It is a histamine liberator, and may worsen the symptoms of asthma.

It is one of the colourants that the Hyperactive Children's Support Group recommends be eliminated from the diet of children. E151 has been banned in the United States, Belgium, Denmark, France, Germany, Sweden, Austria, Switzerland, Japan, Finland and Norway. It was banned in Norway until 2001 when it was unbanned due to trade relationships with other countries. However there is an informal agreement in place, whereby Norwegian manufacturers are not allowed to use E151 in food and sweets. However it is approved by the European Union (EU).^{[citation needed]}

It is used for staining animal by-products in category 2.