81-11-8

Basic information

• Product Name: 4,4'-Diamino-2,2'-stilbenedisulfonic acid
• Synonyms: Diaminostilbene-2,2'-disulfonic acid;4,4'-Diaminostilbene-2,2'-disulphonicacid(Amsonicacid);4,4'-Diamino-2,2'-st;Benzenesulfonic acid,2,2'-(1,2-ethenediyl)bis[5-aMino-;2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci;2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid;2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicacid];2,2’-(1,2-ethylenediyl)bis(5-amino-benzenesulfonicaci
• CAS NO: 81-11-8
• Molecular Formula: C₁₄H₁₄N₂O₆S₂
• Molecular Weight: 370.4
• EINECS: 201-325-2
• Product Categories: Stilbenes;Fluorescent Labels & Indicators;Intermediates of Dyes and Pigments
• Mol File: 81-11-8.mol
• Article Data: 10

Chemical Properties

• Melting Point: 300 °C
• Appearance: Cream to yellow-brown/Crystalline Powder
• Density: 1.4732 (rough estimate)
• Vapor Pressure: 1.3hPa at 25℃
• Refractive Index: 1.6510 (estimate)
• Storage Temp.: -20°C Freezer
• PKA: -1.58±0.50(Predicted)
• Water Solubility: <0.1 g/100 mL at 23 oC
• Stability: Stable. Combustible. Incompatible with iron, strong oxidizing agents.
• Merck: 14,595
• BRN: 629516
• CAS DataBase Reference: 4,4'-Diamino-2,2'-stilbenedisulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4'-Diamino-2,2'-stilbenedisulfonic acid(81-11-8)
• EPA Substance Registry System: 4,4'-Diamino-2,2'-stilbenedisulfonic acid(81-11-8)

Safety Data

• Hazard Codes: C,Xn
• Statements: 34-22-36/37/38-20/21/22
• Safety Statements: 24/25-45-36/37/39-26-22
• RIDADR: UN 2583
• RTECS: WJ6603000
• TSCA: Yes
• Hazardous Substances Data: 81-11-8(Hazardous Substances Data)

Usage

Description

4,4'-Diamino-2,2'-stilbenedisulfonic acid, also known as 4,4'-Diaminostilbene-2,2'-disulfonic acid, is an organic compound with the chemical formula C14H14N2O6S2. It is an odorless yellowish microscopic needle or cream-colored powder with a pH of approximately 4.3 at a concentration of 30 g/L in water. This light yellow powder is useful in organic synthesis and is characterized by its unique chemical properties.

Uses

Used in Organic Synthesis:
4,4'-Diamino-2,2'-stilbenedisulfonic acid is used as a key intermediate in the synthesis of various organic compounds. Its unique structure and reactivity make it a valuable building block for the development of new molecules with potential applications in various fields.
Used in Dye Manufacturing:
In the dye industry, 4,4'-Diamino-2,2'-stilbenedisulfonic acid is used as a raw material for the production of dyes. Its chemical properties allow it to be incorporated into dye molecules, contributing to their color and stability.
Used in Bleaching Agent Production:
4,4'-Diamino-2,2'-stilbenedisulfonic acid is also utilized in the manufacturing of bleaching agents. Its reactivity and reducing properties make it suitable for use in various bleaching processes, enhancing the whiteness and brightness of fabrics and other materials.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

4,4'-Diamino-2,2'-stilbenedisulfonic acid is incompatible with iron. 4,4'-Diamino-2,2'-stilbenedisulfonic acid forms sparingly water-soluble, crystalline salts with many bisquaternary ammonium bases.

Fire Hazard

Flash point data for 4,4'-Diamino-2,2'-stilbenedisulfonic acid are not available; however, 4,4'-Diamino-2,2'-stilbenedisulfonic acid is probably combustible.

Upstream product

• 1211962-72-9 4,4'-dinitrostilbene 2,2'-disulfonic acid 
• 7803-57-8 hydrazine hydrate 
• 111-46-6 diethylene glycol 
• 6404-60-0 4,4'-dinitrobibenzyl-2,2'-disulfonic acid 
• 7647-01-0 hydrogenchloride 
• 7732-18-5 water 
• 99-99-0 1-methyl-4-nitrobenzene 
• 88-20-0 o-toluenesulfonic acid 
• 108-88-3 toluene 
• 119-72-2 4-nitro-4'-amino-stilbene-2,2'-disulphonic acid 
• 121-03-9 4-nitrotoluene-2-sulfonic acid 
• 16473-79-3 4',4'''-dinitro-4,4''-azo-bis-stilbene-2,2'-disulfonic acid 

Downstream Products

• 56682-96-3 5,5'-bis-(4,6-dimethoxy-[1,3,5]triazin-2-ylamino)-2,2'-ethene-1,2-diyl-bis-benzenesulfonic acid 
• 69851-86-1 5-amino-2-formyl-benzenesulfonic acid 
• 56682-91-8 5,5'-bis-(4-amino-6-chloro-[1,3,5]triazin-2-ylamino)-2,2'-ethene-1,2-diyl-bis-benzenesulfonic acid 
• 26110-34-9 5,5'-bis-(4-chloro-6-methoxy-[1,3,5]triazin-2-ylamino)-2,2'-ethene-1,2-diyl-bis-benzenesulfonic acid 
• 588-59-0 stilbene 

Relevant articles and documents

Stilbene type compound as well as synthesis method and application thereof

The invention discloses a stilbene type compound as well as a synthesis method and application thereof, wherein the synthesis method comprises the steps: taking an intermediate 2 and an intermediate 4 as initiators, sequentially carrying out Wittig reaction, reduction reaction, amino protection reaction, condensation reaction, deprotection reaction and amidation reaction, and then refining to obtain the stilbene type compound. The synthesis process is high in controllability, used reagents are low in price, and the method is simple and easy to industrialize. The stilbene type compound can be used as a medicine for resisting tumors and viruses and treating fungal infection and cardiovascular and cerebrovascular diseases.

A reduction of nitro aromatic substituent amino aromatic of substituted method (by machine translation)

The invention relates to amino aromatic substituted object synthesis technology field, in particular to a process for preparing nitro aromatic substituent amino aromatic of substituted method. The method comprises the following steps, water, catalyst is added to the 1st in the reactor, and the reactor temperature, adding reducing iron, adjusting pH, at the same time added to the 1st nitro aromatic substituent in the reactor, thermal insulation reaction, to obtain a reaction liquid; regulating the reaction liquid of pH, thermal reaction, the addition of a stabilizing agent, containing the amino aromatic of substituted 1st solution and iron oxide black crude; adjusting the pH of the 1st solution, solid-liquid separation, obtained amino aromatic substituent. The present invention provides a process for the production of the method is simple, can be continuously produced, with high operation safety and higher selectivity, the reaction time is short, a yield as high as 90% or more, the product quality is good, the content of 98% or more. (by machine translation)

Preparation method of 4,4'-diamino diphenylethene-disulfonic acid

The invention discloses a preparation method of 4,4'-diamino diphenylethene-disulfonic acid. 4,4'-binitro diphenylethene-disulfonic acid or 4,4'-binitro diphenylethene-disulfonate serves as a raw material, the raw material and a supported catalyst are co-dispersed in a solvent, and 4,4'-diamino diphenylethene-disulfonic acid is prepared through a hydrogenation reaction. Based on the total mass of the supported catalyst, active ingredients in the supported catalyst comprise, by mass, 0.1-10% of platinum, 0-5% of ruthenium and 0-5% of iridium, wherein the mass fraction of ruthenium and the mass fraction of iridium cannot be 0 at the same time. According to the preparation method of 4,4'-diamino diphenylethene-disulfonic acid, the high-activity and high-selectivity supported catalyst is adopted, and the produced product reaches the China chemical industry standard HG/T 2279-2011.