4,4'-DIAMINOSTILBENE-2,2'-DISULFONATE, DISODIUM SALT

PRODUCT IDENTIFICATION
CAS NO 7336-20-1

4,4'-DIAMINOSTILBENE-2,2'-DISULFONATE, DISODIUM SALT
EINECS NO.
FORMULA C14H12N2Na2O6S2
MOL WT. 414.36
H.S. CODE
TOXICITY
SYNONYMS DSD Acid, Disodium salt;
Disodium 4,4'-diaminostilbene-2,2'-disulfonate; Disodium 4,4'-diamino-2,2'-stilbene disulfonic acid; 2,2'-(1,2-Ethenediyl) bis[5-aminobenzenesulfonic acid] disodium salt;
SMILES 


                    		
                

                        


                            

                                
CLASSIFICATION


                            		

                            

                                


                            		

                        


                        


                            

                                
PHYSICAL 

                                AND CHEMICAL PROPERTIES


                            		

                        


                        


                            PHYSICAL 

                                STATE

                            White 

                                to Yellowish Crystalline Powder

                        


                        


                            MELTING 

                                POINT 

                            > 

                                300 C

                        


                        


                            BOILING 

                                POINT

                                                        

                        


                        


                            SPECIFIC 

                                GRAVITY 

                            

                                


                            		

                        


                        


                            SOLUBILITY 

                                IN WATER

                                                            

                        


                        


                            AUTOIGNITION 

                                

                                                        

                        


                        


                            pH

                            

                        


                        


                            VAPOR 

                                DENSITY

                            

                        


                        


                            

                                
AUTOIGNITION


                            		

                            

                                
 


                            		

                        


                        


                            NFPA 

                                RATINGS

                            Health:3 

                                ; Flammability:0 ; Reactivity:0 

                        


                        


                            

                                
REFRACTIVE 

                                INDEX


                            		

                            

                                
 


                            		

                        


                        


                            FLASH 

                                POINT

                            

                                
 


                            		

                        


                        


                            STABILITY

                            Stable 

                                under normal conditions. 

                        


                        


                            

                                
APPLICATIONS


                            		

                        


                        


                                                        Sulfonic acid is a compound with general formula RSO2OH, where R is an aliphatic 
or aromatic hydrocarbon. It is a derivative of sulfuric acid (HOSO2OH) where an 
OH has been replaced by a carbon group or a compound where a hydrogen atom has 
been replaced by treatment with sulfuric acid; for example, benzene is converted 
to benzenesulfonic acid (water-soluble). Sulfonic acid has a sulfur atom bonded 
to a carbon atom of a hydrocarbon and bonded also to three oxygen atoms, one of 
which has been attached to a hydrogen atom. Sulfonic acid is acidic due to the 
hydrogen atom, stronger than a carboxylic acid. Sulfonic acid is one of the most 
important organo sulfur compounds in organic synthesis. Sulfonic acids are used 
as catalysts in esterification, alkylation and condensation reactions. 
Sulfonates are salts or esters of sulfonic acid. Sulfonic salts are soluble in 
water. Sulfonic acid and its salts present in organic dyes provide useful 
function of water solubility and or improve the washfastness of dyes due to 
their capabiltity of binding more tightly to the fabric. They are widely used in 
the detergent industry. Alkylbenzene sulfonic acid is the largest-volume 
synthetic surfactant because of its relatively low cost, good performance, the 
fact that it can be dried to a stable powder and the biodegradable environmental 
friendliness. Sulfonate cleaners do not form an insoluble precipitates in hard 
water. Sulfonic acid salts and esters are intermediates widely used in organic 
synthesis and particularly phenolic compounds and cation exchange resins. They 
are synthetic intermediate for a number of biologically active compounds and 
pharmaceutical candidates such as sulfa drugs.
                        
Stilbebe is an analogue of 
azobenzene ( N=N solid bond compound). Stilbene, also called diphenylethylene, 
is an unsaturated hydrocarbon with the formula C6H5CH=CHC6H5. (azobenzene 
formula is C6H5N=NC6H5). Stilbene is a colorless to yellowish crystal insoluble 
in water, soluble in ether and benzene; melting point 124 C. Stilbene and 
azobenzene are parent substances of azo dyes, optical brightener, bleaches, 
                        phosphors and some pH indicators. They are 
also found as rigid moiety (mesogen) in many liquid crystal materials. Azo is the prefix indicating the group -N=N- or a combining form of azote which 
share the core azobenzene structure. Azo compounds contain a solid bond of two 
nitrogen atoms, uniting two hydrocarbon radicals, This structure absorb light 
and is widely used to produce dyes. Azobenzene is a compound composed of two 
phenyl rings linked by azo solid bond. There are geometric isomers (cis and 
trans form). The trans form melts at 68 C comprises orange to red leaflets (the 
cis form melts at 71 C). The isomers are sensitive to light which affords 
rotation or inversion around the solid bond, called reversible cis-to-trans 
photoisomerization. Photoisomerization provide enriched chromophore and dichroic 
properties. Photo-orientation molecules are under the study of molecular 
switches, molecular motors, and molecular electronics. Photoisomerizable 
compounds are used in rewritable CD or DVD printing. 

                        
DSD 

                                Acid Disodium salt,having C=C chromophore group, is used as an intermediate 

                                for dyes, brighters, bleaches 

                                and/or phosphors.



                        


                        


                            SALES 

                                SPECIFICATION

                        


                        


                            

                                
APPEARANCE


                            		

                                                        White 

                                to Yellowish Crystalline Powder

                        


                        


                            CONTENT

                            

                                
95.0% 

                                min


                            		

                        


                        


                            WATER

                            

                                
1.5% 

                                max


                            		

                        


                        


                            TRANSPORTATION

                        


                        


                            PACKING

                            25kgs 

                                in Bag

                        


                        


                            HAZARD 

                                CLASS

                            

                        


                        


                            UN 

                                NO.

                            

                        


                        


                            OTHER 

                                INFORMATION

                        


                        


                            Hazard Symbols: C, Risk Phrases: 34, Safety 

                                Phrases: 24/25-28A-37-45