4,4′-Azoxydiphenol

Name: 4,4′-Azoxydiphenol
Brand: Vaqora Chemicals
SKU: VQ-033145

About 4,4′-Azoxydiphenol

4,4′-Azoxydiphenol (CAS 15596-57-3) is an impurity of Phenacetin offered by Vaqora Chemicals. Formula C12H10N2O3, molecular weight 230.22 g/mol. Its systematic (IUPAC) name is (4-hydroxyphenyl)-(4-hydroxyphenyl)imino-oxidoazanium. Alternative names: 4,4'-dihydroxyazoxybenzene and Phenol, 4,4'-(1-oxido-1,2-diazenediyl)bis-.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

As a characterised impurity of Phenacetin, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, 4,4′-Azoxydiphenol is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

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

Industries

Related to Phenacetin

View every impurity, metabolite and intermediate we list for Phenacetin.

Phenacetin impurities

Specifications & identifiers

Chemical identifiers
Product name	4,4′-Azoxydiphenol
Catalogue No.	VQ-033145
CAS Number	15596-57-3
IUPAC name	(4-hydroxyphenyl)-(4-hydroxyphenyl)imino-oxidoazanium
Molecular formula	C₁₂H₁₀N₂O₃
Molecular weight	230.22 g/mol
Exact mass	230.0691
Grade	Reference Standard
HSN code	38229090
InChIKey	VCVDNSCCCADAHZ-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1N=[N+](C2=CC=C(C=C2)O)[O-])O
PubChem CID	135404235

Physical properties
Physical form	Solid
LogP (XLogP3)	2.4
H-bond donors / acceptors	2 / 4
TPSA	81.6 Å²
Synonyms	4,4'-dihydroxyazoxybenzene, Phenol, 4,4'-(1-oxido-1,2-diazenediyl)bis-, 4-[2-hydroxy-2-(4-hydroxyphenyl)hydrazinylidene]cyclohexa-2,5-dien-1-one, 1,2-Bis(4-hydroxyphenyl)diazene 1-oxide, (Z)-1,2-bis(4-hydroxyphenyl)diazene oxide, 4-[hydroxy-(4-hydroxyphenyl)hydrazono]cyclohexa-2,5-dien-1-one

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H318Causes serious eye damage

Precautionary statements: P264, P264 + P265, P270, P280, P301 + P317, P305 + P354 + P338, P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 4,4′-Azoxydiphenol?

The CAS Registry Number of 4,4′-Azoxydiphenol is 15596-57-3. It is also known as 4,4'-dihydroxyazoxybenzene, Phenol, 4,4'-(1-oxido-1,2-diazenediyl)bis-, 4-[2-hydroxy-2-(4-hydroxyphenyl)hydrazinylidene]cyclohexa-2,5-dien-1-one.

What is the molecular formula and molecular weight of 4,4′-Azoxydiphenol?

4,4′-Azoxydiphenol has the molecular formula C12H10N2O3 and a molecular weight of 230.22 g/mol. Its IUPAC name is (4-hydroxyphenyl)-(4-hydroxyphenyl)imino-oxidoazanium.

What is 4,4′-Azoxydiphenol used for?

4,4′-Azoxydiphenol is supplied as a characterised reference material related to Phenacetin. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of 4,4′-Azoxydiphenol can I order?

We supply 4,4′-Azoxydiphenol in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 4,4′-Azoxydiphenol?

Yes. Every lot of 4,4′-Azoxydiphenol is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 4,4′-Azoxydiphenol be shipped internationally?

Yes. 4,4′-Azoxydiphenol is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.