Ethyl orange is manufactured by Securex Lab Sciences. Ethyl orange acts as a pH indicator. The pH range extends from 3.0 4.8. The indicator changes colour from red to orange in this pH range. The indicator has several other applications. Ethyl orange is used in lithographic plate preparation, holographic storage and it is also used in the preparation of inks. It functions as diagnostic agents to test for diseases which causes amyloid accumulation. Ethyl orange is also used as surface probes. Molecular formula: C16H18N3NaO3 Molecular mass: 355.39 g/mol Solubility: Soluble in water pKa: 4.34 Appearance: Orange powder pH range: 3.4 (red) to 4.8 (orange) Quantity: 5 kg/box