7336-20-1

Basic information

• Product Name: disodium 4,4'-diaminostilbene-2,2'-disulphonate
• Synonyms: disodium 4,4'-diaminostilbene-2,2'-disulphonate;4,4'-Diaminostilbene-2,2'-disulfonate;Amsonicacidsodiumsalt;Benzenesulfonic acid, 2,2-(1,2-ethenediyl)bis5-amino-, disodium salt;4,4'-Diaminostilben-2,2'-disulfonsure, Dinatriumsalz;4,4''-DIAMINO-2,2''-STILBENEDISULFONIC ACID, DISODIUM SALT;2,2'-(1,2-Ethenediyl)bis(5-aminobenzenesulfonic acid sodium) salt;2,2'-(Ethene-1,2-diyl)bis(5-aminobenzenesulfonic acid sodium) salt
• CAS NO: 7336-20-1
• Molecular Formula: C₁₄H₁₂N₂O₆S₂*2Na
• Molecular Weight: 414.36442
• EINECS: 230-847-3
• Mol File: 7336-20-1.mol
• Article Data: 6

Chemical Properties

• Appearance: /
• Solubility: Dimethylformamide, Water
• Water Solubility: 100g/L at 20℃
• CAS DataBase Reference: disodium 4,4'-diaminostilbene-2,2'-disulphonate(CAS DataBase Reference)
• NIST Chemistry Reference: disodium 4,4'-diaminostilbene-2,2'-disulphonate(7336-20-1)
• EPA Substance Registry System: disodium 4,4'-diaminostilbene-2,2'-disulphonate(7336-20-1)

Safety Data

• Hazardous Substances Data: 7336-20-1(Hazardous Substances Data)

Usage

Uses

4,4''-Diaminostilbene-2,2''-disulfonic Acid Disodium Salt is an intermediate in the synthesis of 4,4''-Diisothiocyano-2,2''-stilbenedisulfonic Acid, Disodium Salt. Stilbene disulfonates have been employed to inhibit anion transport in a large number of mammalian cell types (GABA, Cl-). Some stilbene disulfonates can bind specifically to proteins that are not anion transporters. DIDS reacts with CD4 glycoprotein on T helper lymphocytes and macrophages, blocking HIV type-1 growth at multiple stages of the viral life cycle.Fluorescence: max. Abs. l = 341, max. Em. l = 415 (in water)

General Description

Odorless light yellow crystals or powder.

Air & Water Reactions

Water soluble.

Reactivity Profile

disodium 4,4'-diaminostilbene-2,2'-disulphonate is sensitive to iron. .

Fire Hazard

Flash point data for disodium 4,4'-diaminostilbene-2,2'-disulphonate are not available; however, disodium 4,4'-diaminostilbene-2,2'-disulphonate is probably combustible.

Upstream product

• 81-11-8 4,4'-diaminostilbene-2,2'-disulfonic acid 
• 2870-32-8 Direct Yellow 12 (CI 24895) 
• 3709-43-1 4,4’-dinitrostilbene 2,2’-disulfonic acid disodium salt 
• 2870-32-8 disodium 4,4'-bis[(4-ethoxyphenyl)azo]stilbene-2,2'-disulfonate 

Downstream Products

• 116293-76-6 sodium 5-amino-2-formylbenzenesulfonate 

Relevant articles and documents

Liquid fluorescent whitener and preparation method thereof

The invention relates to a liquid fluorescent whitener and a preparation method thereof, and belongs to the technical field of special assistants for printing, dyeing and papermaking. A technical problem to be solved is providing the liquid fluorescent whitener and the preparation method thereof. The effective component of the fluorescent whitener is 4,4'-bis[(4-anilino-6-Ramino acid)-1,3,5-triazinyl-2-yl)amino]stilbene-2,2'-tetrasulfonic acid tetrasodium salt, wherein R is a phenyl ring-containing amino acid group. The preparation method comprises the following steps: mixing 4,4'-diaminostilbene-2,2'-disulfonic acid with a NaOH solution to prepare a sodium 4,4'-diaminostilbene-2,2'-disulfonate solution product I, and mixing amino acids with the NaOH solution to prepare an amino acid sodium salt; adding an emulsifier, concentrated hydrochloric acid, cyanuric chloride and sodium sulfanilate to ice water, and reacting to generate a product II; adding the product I to the product II to generate a product III; and adding the amino acid sodium salt to the product III to obtain a crude whitener IV, carrying out pumping filtration, and carrying out desalting concentration to obtain the liquid fluorescent whitener.

PROCESS FOR PREPARATION OF DISODIUM STILBENEDISULFONATES

The present invention relates to a process for preparing sodium benzenesulf onate, more specifically, to a process for preparing sodium benzenesulfonate, which comprises the steps of a) reacting 2-X-4, 6-dichloro-l, 3, 5-triazine with a benzenesulf onic acid, 2, 2- (1, 2-ethenediyl) bis [5-amino] - disodium salt to produce a mixture; b) adding cyanuric chloride to the mixture from a); c) adding the compound, XH to the mixture from b) to produce a benzenesulf onic acid, 2,2'- (1, 2-ethenediyl) bis [5- (4-X-β-chloro-l, 3, 5-triazine-2- yl) amino] disodium salt; and d) separating and purifying the product to obtain the final benzenesulf onic acid, 2, 2'- (1,2- ethenediyl) bis [5- (4-X-β-chloro-l, 3, 5-triazin-2-yl) amino] - disodium salt [wherein, X represents an organic substituent].

Electrochemical behaviour of bisazodye-chrysophenine

The electrochemical behaviour of the bisazodye-chrysophenine has been studied in the pH range 3.0-10.3 at the dropping mercury electrode and at the pyrolytic graphite electrode.On the basis of polarographic, cyclic voltammetric, coulometric and spectral studies it is concluded that unlike bisazobenzene, where a first 4e, 4H+ process gives the bishydrazo derivative, the cleavage of one of the azo group occurs in this dye.This difference in behaviour is explained on the basis of strongly electron donating substituents present in chrisophenine.The products of electroreduction have been separated and identified.