Dye|Dye intermediates|Fluorescent Brightener|pigment dye

Name:C.I.Pigment Red 50,C.I.15500

Molecular Structure: Single azo

C.I.Pigment Red 50,C.I.15500,CAS 5850-76-0,314.27,C17H11N2NaO3,Lake Red D

Molecular Formula:C₁₇H₁₁N₂NaO₃

Molecular Weight: 314.27

CAS Registry Number:5850-76-0

Manufacturing Methods :2-Aminobenzoic acid diazotization, and Naphthalen-2-ol coupling.

Properties and Applications:red light orange, shallow blue light pink. Slightly soluble in water (orange) and ethanol. Melting point 176 ℃ (from the glacial acetic acid crystal). In concentrated sulfuric acid in scarlet, dilution have orange precipitation. Pigment solution to join hydrochloric acid have orange precipitation; Add sodium hydroxide into darker orange.

List of Suppliers:

Lake Red D (Ridgeway Color & Chemical Division)