5858-39-9

Basic information

• Product Name: ACID RED 4
• Synonyms: 1-Naphthalenesulfonicacid,4-hydroxy-3-[(2-methoxyphenyl)azo]-,monosodiumsalt;4-hydroxy-3-[(2-methoxyphenyl)azo]-1-naphthalenesulfonicacimonosodiumsal;acidred4(c.i.14710);ACID RED 4;CI 14710;AZO EOSIN;Acid Red 4 (C.I.);C.I. Acid Red 4
• CAS NO: 5858-39-9
• Molecular Formula: C₁₇H₁₃N₂O₅S*Na
• Molecular Weight: 380.35
• EINECS: 227-490-0
• Product Categories: Organics
• Mol File: 5858-39-9.mol
• Article Data: 0

Chemical Properties

• Appearance: /
• Density: 1.43g/cm3
• Refractive Index: 1.655
• Storage Temp.: Amber Vial, Refrigerator, Under inert atmosphere
• Solubility: Methanol (Slightly)
• CAS DataBase Reference: ACID RED 4(CAS DataBase Reference)
• NIST Chemistry Reference: ACID RED 4(5858-39-9)
• EPA Substance Registry System: ACID RED 4(5858-39-9)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 5858-39-9(Hazardous Substances Data)

Usage

Description

ACID RED 4 is an organic sodium salt with the counterion 4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate. It is characterized by its red color and solubility in water, acetone, and slightly in ethanol and toluene. ACID RED 4 exhibits various color changes when interacting with different chemicals, such as strong sulfuric acid, hydrochloric acid, and nitric acid.

Uses

Used in Textile Industry:
ACID RED 4 is used as a dye for coloring fabrics. Its ability to produce a red color in water solutions and its compatibility with various chemicals make it suitable for use in the textile industry.
Used in Analytical Chemistry:
ACID RED 4 can be employed as an indicator in analytical chemistry due to its color changes when interacting with different chemicals, such as strong acids and bases.
Used in Quality Control:
The light fastness, soaping, perspiration fastness, oxygen bleaching, and fastness to seawater properties of ACID RED 4 make it useful in quality control processes to ensure the durability and performance of colored products.
Standards:
ACID RED 4 meets various standards for its properties, such as:
Light Fastness: ISO 5 and AATCC 4
Soaping: ISO 2-3 and AATCC 1
Perspiration Fastness: ISO 2-3 and AATCC 3
Oxygen Bleaching: ISO 2-3 and AATCC 1
Fastness to Seawater: Not specified
These standards indicate the performance and quality of ACID RED 4 in different conditions, making it a reliable choice for various applications.

Preparation

p-Anisidine diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid.

Standard

Light Fastness

Fading

Stain

ISO

5

AATCC

4

InChI:InChI=1/C17H14N2O5S/c1-24-15-9-5-4-8-13(15)18-19-14-10-16(25(21,22)23)11-6-2-3-7-12(11)17(14)20/h2-10,18H,1H3,(H,21,22,23)/b19-14+

Downstream Products

• 847453-68-3 C₃₃H₃₇N₅O₇S