beta-BINAPHTHOL

PRODUCT IDENTIFICATION
CAS NO. 602-09-5; 41024-90-2

beta-Binaphthol
EINECS NO. 210-014-0
FORMULA C20H14O2
MOL WT. 286.32

H.S. CODE

  
TOXICITY  
SYNONYMS 2,2'-Dihydroxy-1,1'-dinaphthyl; 2,2'-Dihydroxybinaphthalene;
1,1'-Bi-2-naphthol; 1,1'-Bis-2-naphthol; 2,2'-Dihydroxy-1,1'-binaphthalene; BINOL; 2,2'-Dihydroxy-1,1'-binaphthyl; 2,2'-Dihydroxydinaphthyl; 2,2'-Dinaphthol; Bis-beta-naphthol; Chiral binaphthol; alpha-Binaphthyl-2,2'-diol; (1,1'-Binaphthalene)-2,2'-diol; 1,1'-Binaphthyl-2,2'-diol; (±)-1,1'-Binaphthalene-2,2'-diol; (±)-2,2'-Dihydroxy-1,1'-dinaphthyl;
DERIVATION  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE white crystalline powder
MELTING POINT 215 - 217 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 Health: 2; Flammability: 1; Instability: 0

REFRACTIVE INDEX

  
FLASH POINT  
STABILITY stable under ordinary conditions.

GENERAL DESCRIPTION AND 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

white crystalline powder

PURITY

99.0% min

ALPHA-FORM

Nil
MELTING POINT 215 - 217 C

LOSS ON DRYING

0.5% max

TRANSPORTATION
PACKING  
HAZARD CLASS 6.1 (Packing Group: III)
UN NO. 2811
OTHER INFORMATION
Hazard Symbols: T, Risk Phrases: 25-36, Safety Phrases: 26-45