2,7-NAPHTHALENEDISULFONIC ACID DISODIUM SALT

PRODUCT IDENTIFICATION
CAS NO. 1655-35-2

2,7-NAPHTHALENEDISULFONIC ACID DISODIUM SALT 
EINECS NO. 216-733-6
FORMULA C10H6Na2O6S2
MOL WT.

332.25
H.S. CODE 2930.90
TOXICITY  
SYNONYMS Naphthalene-2,7-disulphonic Acid Disodium Salt;
Sodium 2,7-Naphthalenedisulfonate; Disodium 2,7-Naphthalenedisulfonate; Disodium Naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic Acid Disodium Salt, Dihydrate;  Sodium 2,7-Naphthalenedisulfonate dibasic; 2,7-双磺酸萘;
SMILES 
 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

white to beige powder
MELTING POINT  
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

  
FLASH POINT

 
STABILITY Stable under ordinary conditions

APPLICATIONS
Naphthalene is a white, volatile aromatic hydrocarbon with characteristic odor; insoluble in water, somewhat soluble in methanol/ethanol, soluble in organic solvents and very soluble in ether, chloroform, or carbon disulfide. Commercially it is available in molten form or in flaked form. It has the molecular structure of two fused or condensed benzene rings sharing two adjacent carbon atoms; C10H8. Naphthalene is obtained from coal tar which is distilled in the temperature range of 170 - 230 C and is treated with a sodium hydroxide solution to remove phenols. Naphthalene is obtained by the isolation from pyrolysis residue oils, olefin fractions, and petroleum-derived fractions. The distribution capacity is supposed to be about 60% coal-tar and 40% petroleum-derived naphthalene in U.S.A. It is an important parent material to produce numerous substitution products used in the manufacture of dyes, insecticides, organic solvents and synthetic resins. Phthalic anhydride is prepared by oxidizing naphthalene to be used in the manufacture of dyes, resins, plasticizers, and insecticides. Naphthalene sulfonate surfactants and dispersants, however, have increased their market share significantly and are expected to drive whatever growth there is for naphthalene. Naphthalene is the major raw material for Carbaryl, used as a general-purpose insecticide. Naphthalene is also used for moth repellents, fungicides, lubricants, explosives, wood preservatives, vermicides and hydronaphthalenes (tetralin, decalin). Hydronaphthalenes are used for major raw material for dyes, resins, plasticizers, and insecticides. They are also used in reactive and process solvents, heat transfer fluid, dye carrier,  fuel additives, lubricants, ore flotation and oilfield chemicals.

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. Short carbon chain metallic sulfonate is used in electroplating which is a process for applying a metallic coating on a metal surface by electrodeposition from a suitable electrolyte solution for imparting corrosion resistance and direct production of printed circuit boards without etching out of a piece of copper sheet.

2,7-Naphthalenedisulfonic Acid Disodium Salt is used as an intermediate for the synthesis of dyes, agrochemicals and brightening additives.

SALES SPECIFICATION

APPEARANCE

white to beige powder

CONTENT

95.0% min

INSOLUBLES

0.3% max
FREE ACID

1.0% max
TRANSPORTATION
PACKING 25kg in bag,12mt in container
HAZARD CLASS Not regulated
UN NO.  
OTHER INFORMATION
Hazard Symbols: n/a, Risk Phrases: n/a, Safety Phrases: 24/25-28A-37-45