2,3,5,6-Tetraphenylpyrazine

Name: 2,3,5,6-Tetraphenylpyrazine
Brand: Zemixal
SKU: ZX-031674

Reference StandardAvailable on request

Order 2,3,5,6-Tetraphenylpyrazine (CAS 642-04-6) online at Zemixal. Request a quote with price, lead time and documents.

Pack sizes

2,3,5,6-Tetraphenylpyrazine chemical structure

CAS number642-04-6

FormulaC₂₈H₂₀N₂

Molar mass384.5 g/mol

Physical formSolid

HS code38229090

InChIKeyZPKCJXWKXAHCSX-UHFFFAOYSA-N

IUPAC name2,3,5,6-tetraphenylpyrazine

About 2,3,5,6-Tetraphenylpyrazine

2,3,5,6-Tetraphenylpyrazine belongs to the Oxaprozin reference-standard family in the Zemixal catalogue. For your records (Reference Standard), the material is defined by CAS 642-04-6, formula C28H20N2 and molar mass 384.5 g/mol. It is handled as a solid.

Use cases we see most often

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Storage and safety notes

Classified under GHS with signal word Danger and hazard statements H302, H315, H318 and H335. Read the SDS before first use.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Every shipment includes a certificate of analysis with characterisation data. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Oxaprozin

See every impurity, metabolite and related compound we list for this API.

Oxaprozin standards

Typical uses

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of 2,3,5,6-Tetraphenylpyrazine
Product name	2,3,5,6-Tetraphenylpyrazine
Catalogue number	ZX-031674
CAS number	642-04-6
IUPAC name	2,3,5,6-tetraphenylpyrazine
Molecular formula	C₂₈H₂₀N₂
Molar mass	384.5 g/mol
Exact mass	384.1626
Grade	Reference Standard
Physical form	Solid
XLogP3	6.4
H-bond donors / acceptors	0 / 2
Topological polar surface area	25.8 Å²
HS code	38229090
InChIKey	ZPKCJXWKXAHCSX-UHFFFAOYSA-N
SMILES	C1=CC=C(C=C1)C2=C(N=C(C(=N2)C3=CC=CC=C3)C4=CC=CC=C4)C5=CC=CC=C5
PubChem CID	275938
Synonyms	Oxaprozin Tetraphenylpyrazine, tetraphenylpyrazine, pyrazine, 2,3,5,6-tetraphenyl-, Pyrazine, tetraphenyl-, amarone, benzoin imide, 2,3,5,6-tetraphenylpyrazine (alpha form)

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Corrosive

Irritant or harmful

Signal word Danger

H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation
H413May cause long lasting harmful effects to aquatic life

Precautionary statements P261, P264, P264 + P265, P270, P271, P273, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P354 + P338, P317, P319, P321, P330, P332 + P317, P362 + P364, P403 + P233, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of 2,3,5,6-Tetraphenylpyrazine
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about 2,3,5,6-Tetraphenylpyrazine

Which CAS number identifies 2,3,5,6-Tetraphenylpyrazine?

2,3,5,6-Tetraphenylpyrazine is registered under CAS 642-04-6. You may also see it listed as Oxaprozin Tetraphenylpyrazine, tetraphenylpyrazine, pyrazine, 2,3,5,6-tetraphenyl-. Our catalogue number for this item is ZX-031674.

What are the formula and molar mass of 2,3,5,6-Tetraphenylpyrazine?

For 2,3,5,6-Tetraphenylpyrazine, its formula is C28H20N2 and its molar mass is 384.5 g/mol. The systematic (IUPAC) name is 2,3,5,6-tetraphenylpyrazine. InChIKey ZPKCJXWKXAHCSX-UHFFFAOYSA-N lets you match it in any structure database.

How is 2,3,5,6-Tetraphenylpyrazine used in pharmaceutical QC?

2,3,5,6-Tetraphenylpyrazine is a characterised reference material linked to Oxaprozin. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for 2,3,5,6-Tetraphenylpyrazine?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with 2,3,5,6-Tetraphenylpyrazine?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship 2,3,5,6-Tetraphenylpyrazine to my country?

Yes. Because 2,3,5,6-Tetraphenylpyrazine is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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