4-CHLOROBENZENESULFONIC ACID

PRODUCT IDENTIFICATION
CAS NO. 98-66-8

4-CHLOROBENZENESULFONIC ACID
EINECS NO. 202-690-0
FORMULA ClC6H4SO3H
MOL WT. 192.62
H.S. CODE
TOXICITY

Oral rat LD50: 500 mg/kg
SYNONYMS

p-Chlorobenzenesulfonic Acid; Acide 4-chlorobenzenesulfonique;

4-Chlorbenzolsulfonsäure; ácido 4-clorobencenosulfónico;
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

Grayish crystals
MELTING POINT

57 - 67 C
BOILING POINT

149 C
SPECIFIC GRAVITY

SOLUBILITY IN WATER Soluble
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 Health: 2 Flammability: 1 Reactivity: 2

REFRACTIVE INDEX

 
FLASH POINT

108 C
STABILITY Stable under ordinary 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 It is a derivative of sulfuric acid (HOSO2OH) where an OH has been replaced by a carbon group or a compound where a hydrogen atom has been replaced by treatment with sulfuric acid; for example, benzene is converted to benzenesulfonic acid (water-soluble).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 intermediates for a number of biologically active compounds and pharmaceutical candidates such as sulfa drugs.

Benzenesulfonic acid consumption is linked mostly to phenol and resorcinol production with sodium hydroxide. It is used as a catalyst for dehydration and used in solidifying resins. It is a base material for electroplating solutions. Benzenesulfonic acid, or a derivative thereof, is used as a synthetic intermediate for a number of chemical families of pharmaceuticals, pesticides, dyes, pigments, fluorescent brighteners, and other organic compounds. Commercially, benzenesulfonic acid sodium salt is more common due to high deliquescence of the base material.

SALES SPECIFICATION

APPEARANCE

 grayish crystals
ASSAY 93.0% min
FREE ACID

2.0% max

MOISTURE

3.0% max
TRANSPORTATION
PACKING

25kgs in bag
HAZARD CLASS 8 (Packing Group: II)
UN NO. 1759
OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 25/25-37-45