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NAPHTHOL AS-D

C.I. 37520; 2-Hydroxy-3-Naphthoyl-O-Toluidine; C.I. Azoic Coupling Component No. 18; 3-Hydroxy-2-naphthoic acid o-toluidide; 3-hydroxy-N-(2-methylphenyl)-2-Naphthalenecarboxamide;

CAS NO:

135-61-5

  • Türü                : Organik
  • Formülü          : C18H15NO2
  • EINECS NO.  : 205-205-0
  • Mol Agırlığı    : 277.32
  • H.S. CODE     :
  • Zehililik          :
  • Türevleri        :
  • Kütlesi           :
  • Ekleyen          : Kimyahane Editr

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

pale yellow powder

MELTING POINT 190 C
BOILING POINT  
SPECIFIC GRAVITY  

SOLVENT SOLUBILITY

 
SOLUBILITY IN WATER  

PRINTING RESISTANCE

 
SOLVENT RESISTANCE  
pH  
VAPOR DENSITY  
AUTOIGNITION  
NFPA RATINGS  

REFRACTIVE INDEX

 
FLASH POINT  
STABILITY Stable under ordinary conditions.

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.
SALES SPECIFICATION

APPEARANCE

pale yellow powder

PURITY

98.0% min

CONTENT  

ASSAY

 

FREEZING POINT

 
MELTING POINT

190 C

ACID CONTENT

 
RESIDUE ON IGNITION  

HEAVY METALS

 
WATER  

ASH

 
INSOLUBLES IN WATER  
MOISTURE (K.F)  

COLOR SHADE

 

STRENGTH

 

VOLATILE MATTER

 

OIL ABSORBTION

 
TRANSPORTATION
PACKING 25kgs in bag, 1mts in bag
HAZARD CLASS  
UN NO.  
REMARKS  
OTHER INFORMATION  
Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 24/25
 

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