Disperse Orange 1
[CAS 2581-69-3]

Identification

• Classification: Dyes and pigments >> Dyes >> Disperse dye
• Name: Disperse Orange 1
• Synonyms: 4-Nitro-4'-(phenylamino)azobenzene; Serisol Orange 5R; Setacyl Scarlet 2GN
• Molecular Formula: C₁₈H₁₄N₄O₂
• Molecular Weight: 318.33
• CAS Registry Number: 2581-69-3
• EC Number: 219-954-6

Properties

• Solubility: Insoluble (1.1E^-4 g/L) (25 °C), Calc.^*
• Density: 1.24±0.1 g/cm³ (20 °C 760 Torr), Calc.^*
• Melting point: 157.5-158.0 °C^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** Rondestvedt, Christian S., Jr.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin sensitization	Skin Sens.	1	H317