Chromotrope 2B

CAS: 548-80-1

Ref. 3D-FC52646

Product Information

• Name: Chromotrope 2B
• Synonyms: Acid Red 176CI 165752-(4-Nitrophenylazo)chromotropic acid disodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-(p-nitrophenylazo)-, disodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(4-nitrophenyl)azo]-, disodium salt, 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[2-(4-nitrophenyl)diazenyl]-, sodium salt (1:2), 4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt, 4,5-Dihydroxynaphthalene-3-(4-nitrophenylazo)-2,7-disulfonic acid disodium salt, Acid Red 176, Chromotrop 2 B, Chromotrope Red 4B, Cr-2B, Disodium 4,5-Dihydroxy-3-(P-Nitrophenylazo)Naphthalene-2,7-Disulphonate, Naphtocard Fast Red 3B, P-Nitrobenzene-Azochromotropic Acid, Pcr 2B, Poly-chromotrope 2B, disodium (3E)-5-hydroxy-3-[2-(4-nitrophenyl)hydrazinylidene]-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate, p-Nitrobenzeneazochromotropic acid sodium salt, Acid Red 176~C.I. 16575, C.I. Acid Red 176, disodium salt (8CI), C.I. Acid Red 176, disodium salt, C.I. Acid Red 176, C.I. Acid Red 176 (VAN), C.I. 16575

Description

Chromotrope 2B is a water-soluble dye that is used for the detection of the presence of hydrochloric acid in urine samples. It is also used to detect the presence of biological samples in pharmaceutical preparations. The optimum concentration for this dye is 0.5% with phosphotungstic acid and 3% with human serum. Chromotrope 2B has been shown to be active when exposed to radiation, as well as having an absorption maximum at 381 nm. Chromotrope 2B reacts with plasma proteins to form a blue colored compound called chromoprotein, which can be detected by mass spectrometry.
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• Brand: Biosynth

Chemical properties

• Molecular weight: 513.37 g/mol
• Formula: C₁₆H₉N₃O₁₀S₂·2Na
• Purity: Min. 95%
• Color/Form: Powder