- ▸ Aromatic dinitrile intermediate for polymer and resin synthesis (Plastics & Polymers)
- ▸ Building block for organic photoredox catalysts and fine chemicals (Industrial Manufacturing)
- ▸ Precursor for pharmaceutical and specialty chemical routes (Pharmaceuticals)
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Terephthalonitrile is a aromatic dinitrile synthesis intermediate — a building block used in the manufacture of polymers, p-xylylenediamine, pigments and fine-chemical intermediates. Identity: CAS 623-26-7.
What it is
Terephthalonitrile (CAS 623-26-7, C8H4N2) is a aromatic dinitrile sold as a synthesis intermediate — a defined building block that downstream manufacturers convert into finished products.
Role in synthesis
The two nitrile groups can be hydrolyzed to acids/amides or reduced to amines (it is a route to p-xylylenediamine), making it a versatile difunctional building block. The substitution pattern (isomer) is part of the identity — confirm the CAS to be sure the isomer matches your route, because position isomers react differently and lead to different products.
What it is used to make
It is a building block toward polymers, p-xylylenediamine, pigments and fine-chemical intermediates. RawSource supplies the intermediate; the downstream synthesis, product registration and any application or efficacy are the responsibility of the manufacturer that uses it.
Forms, grades and handling
Supplied to a defined assay with a Certificate of Analysis (CoA) per lot; define the assay and key impurity limits your route needs. Several halo-aromatic intermediates are hazardous and some are regulated — confirm regulatory status and handling for your jurisdiction, and always consult the current Safety Data Sheet (SDS). Typical values are not a guaranteed specification; the CoA governs.
Bulk and custom-quantity supply
RawSource sources Terephthalonitrile direct from producers in bulk and custom quantities, with CoA, TDS and SDS per lot. Tell us the assay and impurity limits and your sample/pilot/production quantity, and we will quote it and confirm supply continuity. See the full range in the intermediates guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Type | Aromatic dinitrile |
| End-use class | Polymer, pigment & fine-chemical intermediates |
| CAS Number | 623-26-7 |
| Molecular Formula | C8H4N2 |
| Molecular Weight | 128.13 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 210-783-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is terephthalonitrile used for?
Terephthalonitrile (1,4-dicyanobenzene, CAS 623-26-7) is an aromatic dinitrile intermediate used to make polymers, p-xylylenediamine, pigments and fine chemicals.
Can RawSource supply terephthalonitrile in bulk or custom quantities?
Yes — RawSource supplies terephthalonitrile in bulk and custom (sample/pilot/production) quantities with CoA, TDS and SDS per lot. Tell us the assay, impurity limits and quantity, and we will quote it and confirm supply.
What is the REACH and TSCA regulatory status of Terephthalonitrile (1,4-Dicyanobenzene)?
Terephthalonitrile (1,4-Dicyanobenzene) (CAS 623-26-7) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 210-783-2).