Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2,5-Dimethylbenzene-1,4-diamine | CAS 6393-01-7

A methyl-substituted para-diamine used as the Pa-2 linker in published covalent organic framework research, where two amine functions connect the aromatic unit and make functional content important alongside chemical purity.

CAS6393-01-7
Molecular formulaC8H12N2

Product overview

Two primary amino groups face one another across the benzene ring, while methyl groups occupy positions 2 and 5. This makes CAS 6393-01-7 a distinct linker from unsubstituted p-phenylenediamine and from the ortho or meta diamines. In framework literature it is called Pa-2. A purchasing specification should establish this exact substitution pattern and the free-diamine form. For condensation work, the amount of amine functionality charged can matter independently of chromatographic area purity. Buyers should therefore compare a suitable quantitative assay with the related-substance profile and specify how water or other sample components enter the charge calculation. Qualification should follow the chosen linker assembly method.

Chemical identity

Chemical name
2,5-Dimethylbenzene-1,4-diamine
CAS number
6393-01-7
Molecular formula
C8H12N2

Application context

Published research combines Pa-2 with 1,3,5-triformylphloroglucinol, often abbreviated Tp, to construct TpPa-2 covalent organic frameworks. The two amino groups provide the connections between this methylated aromatic linker and aldehyde-containing building units. An enzyme-encapsulation study includes TpPa-2 among the frameworks evaluated for biohybrid materials. This is a research and materials-development context.

For procurement supporting those experiments, specify the exact diamine rather than a general phenylenediamine category. Agree amine-content measurement, an impurity-resolving chromatogram and water requirements appropriate to the established condensation method. If a solution or dispersion is used during qualification, record its composition and preparation basis. Comparison against a reference linker batch should use the same framework synthesis and characterization criteria so that material differences can be assessed meaningfully.

Chemistry and synthetic role

The para relationship gives two separated primary-amine connection sites. The two methyl substituents are part of the aromatic linker retained in the framework; they distinguish Pa-2 from the unsubstituted Pa-1 linker.

Quality review

Verify the Pa-2 structure

Confirm para amines and 2,5-methyl substitution, distinguishing the linker from other aromatic diamines.

Compare functional and chemical assays

Request the amine-equivalent or quantitative method alongside chromatographic purity and relevant impurity assignments.

Define sample-state controls

Agree water and any solution-preparation checks required by the framework method.

Preparing a specification

Identify free 2,5-dimethylbenzene-1,4-diamine, CAS 6393-01-7, and the intended linker reaction. Specify amine assay, chromatographic impurity limits, water and any comparative framework qualification.

Packaging and storage

Select package size and resealing arrangements for the planned research use. Confirm storage requirements against the actual supplier’s SDS and label.

Documentation

Request identity spectra, COA, SDS and the analytical basis for amine content. Confirm chromatograms, water results and representative-sample availability for framework evaluation.

Procurement questions

Is Pa-2 the same as p-phenylenediamine?

Pa-2 has two methyl groups at positions 2 and 5; the unsubstituted diamine is a different linker.

Why compare titration with chromatography?

Amine-function measurement and organic peak composition answer different questions about a condensation charge.

What application is documented for TpPa-2?

Published research includes framework preparation and enzyme encapsulation in TpPa-2 biohybrids.

Technical sources
  1. PubChem CAS-resolved identity, CID 160824NCBI / National Library of Medicine
  2. 2,5-Dimethyl-1,4-phenylenediamine D2183Tokyo Chemical Industry
  3. Protocol for mechanochemistry-guided assembly strategy for enzyme encapsulation using covalent organic frameworksSTAR Protocols authors / PubMed Central
  4. Protocol abstract and figures, PMID 37432851National Library of Medicine / PubMed