HC Yellow No. 4

HC Yellow No. 4

AKA “2-((2-(2-Hydroxyethoxy)-4-nitrophenyl)amino)ethanol, O-Di(2-hydroxyethyl)-2-amino-5-nitrophenol, HC Yellow 4, Ethanol, Colorex HCY4, 2-(3-Nitro-6-(beta-hydroxyethylamino)phenoxy)ethanol”

Synthetic

vote to see if the hive agrees

Ingredient Facts

Hc yellow no. 4

AKA: 2-((2-(2-Hydroxyethoxy)-4-nitrophenyl)amino)ethanol, O-Di(2-hydroxyethyl)-2-amino-5-nitrophenol, HC Yellow 4, Ethanol, Colorex HCY4, 2-(3-Nitro-6-(beta-hydroxyethylamino)phenoxy)ethanol

Synthetic · Hair Dyeing | Colorant · EWG: 4

Plant-Derived

Colorant

Synthetic

Clean

A synthetic colorant that creates vibrant yellow tones in hair dye formulations, delivering consistent, long-lasting color results.

Solubility less than 0.1 mg/mL at 68.9 °F (NTP, 1992)

Formula

C10H14N2O5

Mol. Weight

242.23

CAS #

59820-43-8

Form

Powder

Plant-Derived

Synthetic. HC Yellow No. 4 belongs to the azo dye chemical family, synthesized from aromatic compounds and nitrogen-containing precursors. It is produced through diazotization and coupling reactions of aniline derivatives to create the stable yellow colorant.

Function

Hair Dyeing | Colorant

Benefits

Hair Dyeing

Colors Hair

Traditional Use

A synthetic aromatic dye created for hair coloring applications in the 20th century, designed to provide yellow coloration in semi-permanent hair color formulations with good stability.