DESCRIPTION

Brilliant Black PN occurs as black powder or granules. It consists of tetrasodium salt of 4-acetamido-5-hydroxy-6-({7-sulfonato-4-[(4-sulfonatophenyl)diazenyl]naphthalen-1-yl}diazenyl)naphthalene-1,7-disulfonate and subsidiary coloring matters together with sodium chloride and/or sodium sulfate as the principal uncolored components. Brilliant Black PN is typically the sodium salt, but may also be the calcium or potassium salts. It is soluble in water; sparingly soluble in ethanol.