Pigment Yellow 138 CAS 30125-47-4

Introduction

Pigment yellow 138, also known as raw flower yellow, yellow trumpet, chemical name is 2,4-dinitro-N-[4-(2-phenylethyl)phenyl]aniline. The following is an introduction to some of the properties, uses, manufacturing methods and safety information of Yellow 138:

Quality:

- Yellow 138 is a yellow crystalline powder, which is easily soluble in organic solvents, such as methanol, ethanol, etc., and insoluble in water.

- Its chemical structure determines that it has good photostability and heat resistance.

- Yellow 138 has good stability under acidic conditions, but is prone to discoloration under alkaline conditions.

Use:

- Yellow 138 is mainly used as an organic pigment and is widely used in paints, inks, plastics and other industries.

- Due to its vivid yellow color and good color fastness, Yellow 138 is often used as a pigment in oil painting, watercolor painting, acrylic painting and other artistic fields.

Method:

- The preparation method of yellow 138 is more complex, and it is usually obtained by oxidation reaction with amino compounds.

- The specific preparation method may include the reaction of nitroso compounds with aniline to obtain 2,4-dinitro-N-[4-(2-phenylethyl)phenyl]imine, and then the reaction of the imine with silver hydroxide to prepare Huang 138.

Safety Information:

- Yellow 138 is generally considered to be stable and relatively safe under normal use conditions.

- Yellow 138 is prone to discoloration under alkaline conditions, so contact with alkaline substances should be avoided.