7267-14-3

Basic information

• Product Name: 4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride
• Synonyms: 4,5-dichloronaphthalene-1,8-dicarboxylic anhydride;4,5-Dichloro-1,8-Naphthalic Anhydride;4,5-dichloronaphthalene-1,8-dicarbixylicanhydride;1H,3H-Naphtho(1,8-cd)pyran-1,3-dione,6,7-dichloro-;4,5-Dichloronaphthalic anhydride;4,5-Dichloro-1,8-naphthalenedicarboxylic anhydride;6,7-Dichloro-1H,3H-naphtho[1,8-cd]pyran-1,3-dione;4,5-Dichloronaphthalene-1,8-dicarboxylic acid anhydride
• CAS NO: 7267-14-3
• Molecular Formula: C₁₂H₄Cl₂O₃
• Molecular Weight: 267.06
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 7267-14-3.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 833.5 °C at 760 mmHg
• Flash Point: 457.9 °C
• Appearance: /
• Density: 1.684g/cm³
• Refractive Index: 1.739
• CAS DataBase Reference: 4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride(CAS DataBase Reference)
• NIST Chemistry Reference: 4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride(7267-14-3)
• EPA Substance Registry System: 4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride(7267-14-3)

Safety Data

• Hazardous Substances Data: 7267-14-3(Hazardous Substances Data)

Usage

General Description

4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride, also known as 1,8-Dichloro-4,5-naphthalene dicarboxylic anhydride, is a chemical compound primarily used in the production of high performance polymers and polyimides. It is a white to light yellow solid with a high melting point and low solubility in water. This chemical is known for its strong heat and chemical resistance, making it useful in a variety of industrial applications such as in the manufacturing of electronic components, printed circuit boards, and high temperature resistant coatings. It is considered a hazardous substance and can cause irritation to the skin, eyes, and respiratory system upon exposure, and should be handled with proper safety precautions.

InChI:InChI=1/C24H10Cl4O7/c25-13-5-1-9(21(29)30)17-11(3-7-15(27)19(13)17)23(33)35-24(34)12-4-8-16(28)20-14(26)6-2-10(18(12)20)22(31)32/h1-8H,(H,29,30)(H,31,32)

Upstream product

• 83-32-9 acenaphthene 
• 4208-97-3 5,6-dichloroacenaphthene 
• 7267-11-0 4,5-dichloro-naphthalene-1,8-dicarboxylic acid 

Downstream Products

• 25507-27-1 4,5-Dichlornaphthalsaeure-N-methylimid 
• 705966-93-4 4-chloro-benzene-1,2,3-tricarboxylic acid 

Relevant articles and documents

Organic synthesis intermediate 4,5-dichloro-1,8-naphthalic anhydride synthesis method

The invention discloses an organic synthesis intermediate 4,5-dichloro-1,8-naphthalic anhydride synthesis method, which comprises: adding 1,8-dihydroxymethyl-4,5-dichloro-6-hydroxynaphthalene and a potassium chloride solution into a reaction container, increasing the temperature of the solution, controlling the stirring speed, adding a 1,3-propanesultone solution, and carrying out a reaction for 90-120 min; and adding ytterbia powder, continuously carrying out the reaction, increasing the temperature, refluxing, adding an oxalic acid solution, adjusting the pH value, reducing the temperature,precipitating the crystal, washing with a 4-chlorobenzotrifluoride solution, washing with a m-bromochlorobenzene solution, re-crystallizing in a beta-chloronaphthalene solution, and dehydrating with adehydrating agent to obtain the finished product 4,5-dichloro-1,8-naphthalic anhydride.