CI 12700 is a chemical compound, a synthetic red dye also known as Disperse Yellow 16, Solvent Yellow 16-

Chemical name: 5-methyl-2-phenyl-4-phenyldiazenyl-1H-pyrazol-3-one

The name describes the structure of the molecule:

• CI stands for "Colour Index", which is an international naming system used to classify dyes. This system is used to standardize the names of dyes across different countries and industries.
• 12700 is a unique identifier assigned to a particular dye. Each dye in the Colour Index has a unique number that distinguishes it from others.

Raw Materials and Their Functions

Phenyl Compounds. Used as raw materials in the synthesis of the dye, they contribute to the molecular structure and chromatic properties of CI 12700.

Diazenes. Functional groups that participate in the formation of the dye structure, imparting its unique coloring properties.

Industrial Chemical Synthesis of CI 12700

• Organic Synthesis with the reaction of phenyl compounds with diazenes to form the dye 5-methyl-2-phenyl-4-phenyldiazenyl-1H-pyrazol-3-one.
• Reaction Control. The synthesis reaction is monitored to ensure it occurs correctly and the final product has the desired chromatic properties.
• Purification. After synthesis, CI 12700 is purified to remove impurities and by-products.
• Quality Control. The purified CI 12700 undergoes quality checks to ensure it meets the required standards. After quality control, it is packaged for use in applications such as cosmetics, textiles, and paper products.

Form and Color

Appears in the form of a yellow powder

What it is used for and where

Cosmetics

It is a restricted ingredient as IV/15  a Relevant Item in the Annexes of the European Cosmetics Regulation 1223/2009. Substance or ingredient reported:

It is an ingredient that makes the final product more attractive from an aesthetic point of view, but can pose a potential health risk with undesirable side effects especially when used continuously as it can be absorbed through the skin or mucous membranes.

Safety

 It is an ingredient that has some important health-related contraindications: it should only be used in cosmetic products that have contact with the skin for a short time.

• Molecular Formula  C₁₆H₁₄N₄O
• Molecular Weight  278.31 g/mol
• CAS   4314-14-1
• UNII N83897KOD7
• EC number   224-330-1
• DTXSID5052098

Trade name:

FAT YELLOW 3G

OIL YELLOW 3G

SUDAN YELLOW 146

Synonyms:

1-phenyl-3-methyl-4-phenylazo-5-pyrazolone