119-72-2

Basic information

• Product Name: 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid
• Synonyms: 4-amino-4’-nitro-2,2’-stilbenedisulfonicacid;4-amino-4’-nitro-2’-stilbenedisulfonicacid;5-amino-2-[2-(4-nitro-2-sulfophenyl)ethenyl]-benzenesulfonicaci;kyselina4-amino-4’-nitrostilben-2,2’-disulfonova;kyselina4-nitro-4’-aminostilben-2,2’-disulfonova;4-AMINO-4'-NITROSTILBENE-2,2'-DISULFONIC ACID;4-NITRO-4'-AMINOSTILBENE-2,2'-DISULFONIC ACID;5-amino-2-[2-(4-nitro-2-sulfophenyl)ethenyl]-benzenesulfonic acid
• CAS NO: 119-72-2
• Molecular Formula: C₁₄H₁₂N₂O₈S₂
• Molecular Weight: 400.38
• EINECS: 204-346-5
• Mol File: 119-72-2.mol

Chemical Properties

• Melting Point: >300°C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: white powder
• Density: 1.5746 (rough estimate)
• Refractive Index: 1.6900 (estimate)
• PKA: -1.31±0.45(Predicted)
• Water Solubility: Soluble in water.
• CAS DataBase Reference: 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid(119-72-2)
• EPA Substance Registry System: 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid(119-72-2)

Safety Data

• Statements: 20/21/22-36/37/38
• Safety Statements: 26-36/37/39
• RTECS: WJ6100000
• TSCA: Yes
• Hazardous Substances Data: 119-72-2(Hazardous Substances Data)

Usage

Uses

Used in Chemical Synthesis:
4-Nitro-4'-aminostilbene-2,2'-disulfonic acid is used as a reactant in the synthesis of triazine-containing asymmetrical fluorescent brighteners. These brighteners are essential additives in the textile, paper, and detergent industries to enhance the appearance of fabrics and papers by reflecting light and creating a brighter, more vivid color.
Used in Textile Industry:
In the textile industry, 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid is used as a key component in the production of fluorescent brighteners. These brighteners are added to fabrics during the manufacturing process to improve their colorfastness and overall visual appeal, making them more attractive to consumers.
Used in Paper Industry:
Similarly, in the paper industry, 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid is utilized in the creation of fluorescent brighteners that enhance the appearance of paper products. By adding these brighteners to paper, manufacturers can achieve a more vibrant and eye-catching result, which can be particularly beneficial for marketing materials, packaging, and other visually-oriented applications.
Used in Detergent Industry:
In the detergent industry, 4-Nitro-4'-aminostilbene-2,2'-disulfonic acid is employed in the formulation of laundry detergents containing fluorescent brighteners. These brighteners help to improve the appearance of washed fabrics by making them appear brighter and more colorful, thus providing a more satisfying cleaning experience for consumers.

Upstream product

• 1211962-72-9 4,4'-dinitrostilbene 2,2'-disulfonic acid 

Downstream Products

• 5136-34-5 6,6'-(ethane-1,2-diyl)bis(3-aminobenzenesuIfonic acid) 
• 81-11-8 4,4'-diaminostilbene-2,2'-disulfonic acid 
• 67969-96-4 C₁₄H₁₀N₃O₈S₂⁽¹⁺⁾*Cl^(1-) 
• 63216-86-4 C₂₄H₁₈N₄O₉S₃ 

Relevant articles and documents

Nitrogen doped carbon supported iron catalysts for highly selective production of 4,4′-diamino-2,2′-stilbenedisulfonic acid

Nitrogen doped carbon supported iron catalysts were prepared from pyrolysis of a multidentate nitrogen ligand iron complex supported on chitosan at different temperature, and showed good performances in the reduction of 4,4′-dinitrostilbene-2,2′-disulfonic acid (DNS acid) to 4,4′-diamino-2,2′-stilbenedisulfonic acid (DSD acid) with hydrazine hydrate (N2H4·H2O) as reductant. Characterization results revealed that the iron is mainly present in the form of Fe2O3 and metallic iron nanoparticles. The doped N atoms functionalized as anchoring sites to stabilize iron nanoparticles, which endows the catalysts with excellent activity and superior reusability.

An active fluorescent yellow dye and its preparation method and application

The invention discloses an active fluorescent yellow dye and a preparation method and an application thereof. The structure of the active fluorescent yellow dye is shown as a formula (I). The active fluorescent yellow dye provided by the invention has high color fastness, high fixation rate and high combination stability with fibers, and has excellent brightness when being applied to cellulosic fibers such as dyed cotton, hemp and artificial cotton. In the formula (I), X is Cl or F; n is 1or 2; and M is H or an alkali metal. R is selected from one of H and chemical bonds shown in the specifications.