1,8-NAPHTHOLACTAM

PRODUCT IDENTIFICATION
CAS NO.

130-00-7

1,8-NAPHTHOLACTAM

EINECS NO.

204-973-4

FORMULA C11H7NO
MOL WT. 169.18
H.S. CODE  
TOXICITY  
SYNONYMS Benz[cd]indol-2(1H)-one;
SMILES 
 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

light yellow powder

MELTING POINT 173 - 178 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
AUTOIGNITION  
pH  
VAPOR DENSITY  
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.

 Lactone, Lactam, Lactim

Lactone is an internal cyclic monoester (anhydride) derived from the hydroxyl and carboxyl radicals of gamma or delta hydroxy acids by the removal of a H2O between a carboxyl and a hydroxyl group in the same molecule; gamma-hydroxybutyric acid forms gamma-butyrolactone and delta-hydroxydecanoic acid forms delta-decalactone spontaneously. In result, prefixes describe the ring size: beta- is for 4-membered ring), gamma- , 5-membered, and delta-, 6-membered ring. Lactam (a cyclic amide) is the nitrogen analog of lactone. Gamma-aminobutyric acid forms gamma-butyrolactam (also called 2-pyrrolidinone). Lactim is the tautomeric enol form of lactam. Lactam structure, a heteroatomic cyclic amide compound, is an important part in antibiotics such as penicillin. These structures, cyclic esters and analogues, are active nucleuses in pharmacological activity and flavorings. Their good solvency properties also useful in industrial application. Lactams have big demand in artificial fibre industry. They are polymerizable and used as nylon precursors.

1,8-Naphtholactam is used as an intermediate for dyes, pigments and fluorescent whiteners.

SALES SPECIFICATION

APPEARANCE

light yellow powder

ASSAY

98.0% min

MELTING POINT 173 - 178 C
TRANSPORTATION
PACKING 25kgs in fiber drum
HAZARD CLASS  
UN NO.

 

OTHER INFORMATION