HQDA

Base Information

• Chemical Name: HQDA
• CAS No.: 17828-53-4
• Molecular Formula: C22H10 O8
• Molecular Weight: 402.317
• Mol file: 17828-53-4.mol

Synonyms:Phthalicanhydride, 4,4'-(p-phenylenedioxy)di- (8CI);1,4-Bis(3,4-dicarboxyphenoxy)benzene dianhydride;1,4-Diphenoxybenzene-3',4',3'',4''-tetracarboxylic acidanhydride;4,4'-(4,1-Phenylenedioxy)bis[phthalic anhydride];4,4'-(p-Phenylenedioxy)bis[phthalic anhydride];

Chemical Property of HQDA

Chemical Property:

• Melting Point: 251-252 oC
• Boiling Point: 638.9±50.0 °C(Predicted)
• PSA: 105.20000
• Density: 1.566
• LogP: 3.89240
• Storage Temp.: 2-8°C Refrigerator

Purity/Quality:

98%, ^*data from raw suppliers

1,4-Bis(3,4-dicarboxyphenoxy)benzenedianhydride ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

Technology Process of HQDA

There total 6 articles about HQDA which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 90.0%

C38H46O10 → 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (17828-53-4)

Guidance literature:

at 250 ℃; for 10h;

Reference yield:

→ 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (17828-53-4)

Guidance literature:

Reference yield:

4-chlorophthalic acid (89-20-3) + hydroquinone (123-31-9,8027-02-9) → 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (17828-53-4)

Guidance literature:

Multi-step reaction with 2 steps

1.1: toluene-4-sulfonic acid / 5,5-dimethyl-1,3-cyclohexadiene / 80 °C

1.2: 6 h / 150 °C / Inert atmosphere; Reflux

2.1: 10 h / 250 °C

With toluene-4-sulfonic acid; In 5,5-dimethyl-1,3-cyclohexadiene;

upstream raw materials:

4-chlorophthalic acid

hydroquinone

1,4-bis(4-oxy-1,2-benzenedicarboxylic acid)benzene

4-nitro-N-methyl-phthalimide

Refernces

• 1、 -. "METHODS OF MANUFACTURE OF DIANHYDRIDES". . . Retrieved 2021/12/31.