1327-81-7

Basic information

• Product Name: Vat Blue 42
• Synonyms: Vat Blue 42;Phenol, 4-[(9-ethyl-9H-carbazol-3-yl)amino]-, reaction products with sodium sulfide (Na2(Sx));Sulfur Vat Blue GNX;Vat blue 42 (C.I. 53640);C.I. Vat Blue 42;Blue GNX;Dycosulfux Vat Blue GNX.;C.I.53640
• CAS NO: 1327-81-7
• Molecular Weight: 302.37
• EINECS: 215-500-6
• Product Categories: UVCBs-organic-metal salts
• Mol File: 1327-81-7.mol
• Article Data: 0

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Vat Blue 42(CAS DataBase Reference)
• NIST Chemistry Reference: Vat Blue 42(1327-81-7)
• EPA Substance Registry System: Vat Blue 42(1327-81-7)

Safety Data

• Hazardous Substances Data: 1327-81-7(Hazardous Substances Data)

Usage

Description

Vat Blue 42 is a blue to red light blue dye that exhibits various color changes when exposed to different chemicals. In concentrated sulfuric acid, it appears greenish-blue, and upon dilution, it forms a green-blue precipitate. When in contact with a basic insurance powder solution or sodium hydroxide, it turns yellow.

Uses

Used in Textile Industry:
Vat Blue 42 is used as a dye for coloring fabrics, providing a vibrant blue to red light blue color. It is known for its excellent ironing fastness, chlorine bleach resistance, light fastness, and compatibility with mercerized and oxygen bleach processes.
Used in Quality Assurance:
Vat Blue 42 is used in various testing methods to evaluate the performance of fabrics and dyes. According to ISO and AATCC standards, it has received ratings of 4 for ironing fastness, 3 for chlorine bleach, 5 for light fastness, 3 for oxygen bleach, and 4 for soaping, indicating its high-quality performance in these areas.

Preparation

3-(4-Hydroxyanilino)-9-ethylcarbazole in Butanol sodium polysulfide solution heating, methods and C.I. Vat Blue 43 (C.I. 53630) similarity. This indophenol is by N – ethylcarbazole and 4-Nitrosophenol in concentrated sulfuric acid, in – 23 ℃ condensation and have to (BIOS 983,65-70) o note: use with C.I. leuco sulfur dye similar method, some the structure of the dyes can be converted into the leuco compound.

Standard

Ironing Fastness

Fading

Stain

ISO

4

AATCC

5