1-NAPHTHOL-4-SULFONIC ACID SODIUM SALT

PRODUCT IDENTIFICATION

CAS NO. 6099-57-6

1-NAPHTHOL-4-SULFONIC ACID SODIUM SALT

EINECS NO. 228-050-0
FORMULA C10H7NaO4S
MOL WT. 246.21
H.S. CODE

2908.20

TOXICITY  
SYNONYMS Neville Winther acid;
4-hydroxy-1-naphthalenesulfonic Acid, Monosodium Salt;
Sodium-4-hydroxy-1-naphthalene sulfonate;
SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white to light grey Solid
MELTING POINT  
BOILING POINT  
SPECIFIC GRAVITY

 

SOLUBILITY IN WATER Soluble
pH  
VAPOR DENSITY  
FLASH POINT  

APPLICATIONS

Naphthols are either of two crystalline monohydric alcohols, derived from naphthalene and belong to the phenol family. There are position isomers; alpha-naphthol (also called 1-naphthol) is 1-hydroxynaphthalene and beta-naphthol (also called 2-naphthol) is 2-hydroxynaphthalene. The compound 1-naphthol is made by heating 1-naphthalenesulfonic acid with caustic alkali or by heating 1-naphthylamine with water under pressure. The compound 2-naphthol is manufactured by fusing 2-naphthalenesulfonic acid with caustic soda. The different positions provide various chemical structures which offer important roles to each characteristic colours. Naphthols are slightly soluble in water but readily soluble in short alcohols, ethers chlorinated solvents, and caustic alkalis. They are used directly in making several dyes and are converted into numerous corresponding amines, esters, ethers and carboxylic derivatives as well as into numerous sulfo- and nitro-group substituted (mono-, di- and tri) naphthol compounds. They find extensive applications in making dyes, pigments, fluorescent whiteners, tanning agents, antioxidants, and antiseptics. Naphthol structure is found as a ligand in transition-metal catalysts particularly in the form of  binaphthol (binol) which is composed of two naphthol rings connected at one carbon site on each ring. Optically active binol is widely used in asymmetric synthesis of rearrangements, epoxidations, reductions. 

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 It is a derivative of sulfuric acid (HOSO2OH) where an OH has been replaced by a carbon group or a compound where a hydrogen atom has been replaced by treatment with sulfuric acid; for example, benzene is converted to benzenesulfonic acid (water-soluble).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.

SALES SPECIFICATION

APPEARANCE

white to light grey Solid
CONTENT OF ACID

80.0% min

WATER

3.0% max

CLARITY OF SOLUTION

almost clear and transparent (in water)

INSOLUBLE MATTERS

0.1% max
TRANSPORTATION
PACKING 25kgs in Bag
HAZARD CLASS TSCA Listed
UN NO.  
OTHER INFORMATION