Name:C.I.Acid Red 119,C.I.262085
Molecular Structure: Double azo class
C.I.Acid Red 119,C.I.262085,CAS 12220-20-1/70210-06-9,637.67,C31H25N5Na2O6S2,Acid Red V,Weak Acid Red Brown V
Molecular Formula:C31H25N5Na2O6S2
Molecular Weight: 637.67
CAS Registry Number:12220-20-1/70210-06-9
Manufacturing Methods : 3-Aminobenzenesulfonic acid diazo, and Naphthalen-1-amine coupling, product to diazo, and 3-(Ethyl(phenyl)amino)methyl)benzenesulfonic acid coupling.
Properties and Applications: red. Used for wool, polyamide, silk dyeing and printing, also can be used for leather color.
Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
Fading | Stain | Fading | Stain | Fading | Stain | |||
ISO | 5-6 | 4-5 | 5 | 4 | 4-5 | |||
AATCC | 4 | 5 | 5 | 5 | 4 | 3 | 3-4 | |
Acid Red 119, also known as C.I. Acid Red 119 or C.I. 262085, is a dye belonging to the double azo class. In this detailed discussion, we will explore its molecular structure, manufacturing methods, properties, applications, and standard testing results.
Molecular Structure and Identification
Molecular Structure: Acid Red 119 belongs to the double azo class, a chemical structure characterized by azo linkages. The specific arrangement of atoms in its molecular structure gives it its distinctive properties and color.
Molecular Formula: C<sub>31</sub>H<sub>25</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>6</sub>S<sub>2</sub>
Molecular Weight: 637.67 g/mol
CAS Registry Numbers:
- 12220-20-1
- 70210-06-9
Acid Red 119 is also known by alternative names such as Acid Red V and Weak Acid Red Brown V.
Manufacturing Methods
The manufacturing process involves intricate chemical reactions:
3-Aminobenzenesulfonic Acid Diazotization: Starting with this key compound, diazotization is a crucial step where the amino group is converted to a diazo group.
Naphthalen-1-amine Coupling: Diazotized 3-aminobenzenesulfonic acid is then coupled with naphthalen-1-amine, forming an azo compound.
Diazo and 3-(Ethyl(Phenyl)Amino)Methyl)Benzenesulfonic Acid Coupling: This step involves coupling the intermediate azo compound with another diazo compound, specifically 3-(Ethyl(Phenyl)Amino)Methyl)Benzenesulfonic Acid, further modifying the molecular structure to achieve the desired Acid Red 119.
Properties and Applications
Color: Acid Red 119 exhibits a vibrant red color.
Applications:
- Acid Red 119 finds extensive usage in dyeing and printing various materials:
- Wool: It is employed in dyeing wool, enhancing its color and appearance.
- Polyamide: Acid Red 119 is utilized for dyeing polyamide materials, adding a red hue.
- Silk: The dye is used in the silk industry to impart a rich red shade.
- Leather: Acid Red 119 is also applicable in coloring leather.
Standard Testing Results
Standard testing assesses several key characteristics of Acid Red 119 to ensure its quality and performance in various applications.
Light Fastness:
- ISO: 5-6
- AATCC: 4
Soaping:
- ISO: 4-5
- AATCC: 5
Perspiration Fastness:
- ISO: 5
- AATCC: 5
Oxygen Bleaching:
- ISO: 4
- AATCC: 5
Fastness to Seawater:
- ISO: 4-5
- AATCC: 4
Fading (Stain):
- ISO: 4-5 (Fading), 4 (Stain)
- AATCC: 3 (Fading), 3-4 (Stain)
These standardized results reflect the dye’s performance and durability under different conditions, providing valuable information for its suitable applications and potential limitations.
In conclusion, Acid Red 119, with its distinctive molecular structure and versatile applications, plays a significant role in the textile and leather industries, offering a brilliant red hue and good fastness properties essential for quality dyeing and printing. The precise manufacturing methods ensure its consistency and efficacy, making it a valuable component in the world of dyes and pigments.
