This Bismarck Brown Y (C.I. 21000) is a chromogenic dye from the category of Life Science, specifically designed for histology and microscopy applications. It has a CAS Number of 10114-58-6 and is known as C.I. Basic Brown 1 according to its preferred name. Its IUPAC name is "4-[[3-[(2,4-diaminophenyl)diazenyl]phenyl]diazenyl]benzene-1,3-diamine." The molecular formula of this dye is C18H18N8 with a molecular weight of 346.4 g/mol. This compound starts decomposing at approximately 428°F (NTP, 1992). It may have long-lasting harmful effects on aquatic life, making it potentially hazardous to the aquatic environment.

• CAS Number: 10114-58-6
• Molecular Formula: C18H18N8
• Molecular Weight: 346.4
• Exact Mass: 346.16544261
• Melting Point: Starts decomposing at approximately 428 °F (NTP, 1992)
• Hazard Statements:
• H413 (88.6%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]