1,4-Naphthalene Dicarboxylic Acid
Structural formula
Chemical Name: 1,4-naphthalene dicarboxylic acid
Other names: naphthalene-1,4-dicarboxylic acid, 98 +%; 1,4-naphthalene dicarboxylic acid; naphthalene-1,4-dicarboxylic acid, KCB acid; naphthalene-1,4-dicarboxylic acid, KCB acid; 1,4-naphthalene dicarboxylic acid, 95%; naphthalene-1,4-dicarboxylic acid; 1,4-naphthalene dicarboxylic acid; 1,4-naphthalene dicarboxylic acid
Molecular formula：C12H8O4
molecular weight：216.19
Numbering system:
CAS No.：605-70-9
EINECS: 210-094-7
HS CODE: 29173990
Physical Data
Appearance: Small bar crystal
Purity: ≥98.0%
Boiling point: 490.2±28.0 °C(Predicted)
Density: 1.54 g/cm3
Melting point: 309℃（325℃）。
Solubility: soluble in ethanol, blue fluorescence, insoluble in boiling water.
Application
Used in the production of optical brightener, dye intermediates, etc.
Production Method
1-methyl-4-acetylnaphthalene and potassium dichromate are oxidized for 18h at 200-300 ℃ and about 4MPa; 1,4-dimethylnaphthalene can also be obtained by liquid phase oxidation at 120 ℃ and about 3kpa with cobalt manganese bromide as catalyst.
Storage
Sealed store in a cool and dry place.
