Acid Orange 56
Name:C.I.Acid Orange 56,C.I.22895
Molecular Structure: Double azo class
C.I.Acid Orange 56,C.I.22895,CAS 6470-20-8,728.66,C32H22N6Na2O8S2,Acid Orange GAcid Orange SG,Acid Brilliant Orange G
Molecular Formula:C32H22N6Na2O8S2
Molecular Weight: 728.66
CAS Registry Number:6470-20-8
Manufacturing Methods : 2,2′-Disulfo-4,4,diaminobibenzene double nitriding, respectively, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one and Naphthalen-2-ol coupling.
Properties and Applications: red light orange. Soluble in water for palm orange, soluble in ethanol for gold orange: the strong sulfuric acid for blood-red, diluted for orange brown. The dye solution to join strong hydrochloric acid have orange brown precipitation; Add thick sodium hydroxide solution for orange brown. Used for wool, silk and fiber dyeing and printing directly, also used for paper coating and leather shading.
Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
Fading | Stain | Fading | Stain | Fading | Stain | |||
ISO | 3 | 4 | 3-4 | 4 | 2 | 4-5 | 4-5 | |
AATCC | 4 | 3-4 | 3-4 | 3 | 1 | 3-4 | 3-4 | |
Comprehensive Overview
Acid Orange 56, also known as C.I. Acid Orange 56 or C.I. 22895, is a dye belonging to the double azo class. In this article, we’ll delve into the molecular structure, manufacturing methods, properties, applications, and standard testing of Acid Orange 56.
Molecular Structure and Formula
- Name: C.I. Acid Orange 56, C.I. 22895
- Molecular Structure: Double azo class
- Molecular Formula: C32H22N6Na2O8S2
- Molecular Weight: 728.66
- CAS Registry Number: 6470-20-8
Manufacturing Methods
The synthesis of Acid Orange 56 involves a two-step process. Firstly, 2,2′-Disulfo-4,4-diaminobibenzene is double nitrified. Subsequently, it is coupled with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one and Naphthalen-2-ol.
Properties
Acid Orange 56 appears as red light orange and possesses the following properties:
- Solubility:
- Soluble in water, producing a palm orange color.
- Soluble in ethanol, resulting in a gold-orange hue.
- Sulfuric Acid Reaction:
- Strong sulfuric acid induces a blood-red color.
- Diluted sulfuric acid causes an orange-brown shade.
- Chemical Reactions:
- Addition of a dye solution to strong hydrochloric acid leads to orange-brown precipitation.
- Thick sodium hydroxide solution addition results in an orange-brown color.
Applications
Acid Orange 56 finds diverse applications in the textile and paper industries:
- Textile Industry:
- Used for dyeing and printing wool, silk, and other fibers directly.
- Paper Industry:
- Utilized for paper coating applications.
- Leather Industry:
- Employed for shading leather products.
Standard Testing
The quality and durability of Acid Orange 56 are assessed through various standard tests:
- Light Fastness:
- ISO: 3
- AATCC: 4
- Soaping:
- ISO: 4
- AATCC: 3-4
- Perspiration Fastness:
- ISO: 3-4
- AATCC: 3-4
- Oxygen Bleaching:
- ISO: 4
- AATCC: 3
- Fastness to Seawater:
- ISO: 2
- AATCC: 1
- Fading Stain:
- ISO: 4-5
- AATCC: 3-4
These standardized tests help gauge the color fastness and resistance of Acid Orange 56 to various environmental and chemical factors.
In conclusion, Acid Orange 56 is a significant dye in the colorant industry, appreciated for its vibrant hues and versatility in various applications, particularly in the textile and paper sectors. Understanding its molecular structure, properties, and applications is crucial for optimal utilization and quality control in industries where it is employed.
