p-Hydroxy azobenzene

Name: p-Hydroxy azobenzene
Brand: Vaqora Chemicals
SKU: VQ-000674

About p-Hydroxy azobenzene

p-Hydroxy azobenzene (CAS 1689-82-3) is a biological stain offered by Vaqora Chemicals with a typical assay of 98%. Formula C12H10N2O, molecular weight 198.22 g/mol. Its systematic (IUPAC) name is 4-phenyldiazenylphenol. It is also known as 4-Phenylazophenol or Solvent Yellow 7.

It is supplied as a solid. Key physical data: a melting point of 150-152 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span histology and cytology staining, microscopy, clinical laboratories and polymer and resin production. Typical end-use sectors are academic and industrial research, diagnostics and biotechnology and paints and coatings.

Available in 25 g and 100 g packs, p-Hydroxy azobenzene is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Polymer & resin production

Industries

Specifications & identifiers

Chemical identifiers
Product name	p-Hydroxy azobenzene
Catalogue No.	VQ-000674
CAS Number	1689-82-3
IUPAC name	4-phenyldiazenylphenol
Molecular formula	C₁₂H₁₀N₂O
Molecular weight	198.22 g/mol
Exact mass	198.0793
Purity / assay	98%
HSN code	29270090
InChIKey	BEYOBVMPDRKTNR-UHFFFAOYSA-N
SMILES	C1=CC=C(C=C1)N=NC2=CC=C(C=C2)O
PubChem CID	15529

Physical properties
Physical form	Solid
Appearance	Solid
Melting point	150-152 °C
LogP (XLogP3)	3.7
H-bond donors / acceptors	1 / 3
TPSA	45 Å²
Synonyms	4-Phenylazophenol, Solvent Yellow 7, 4-hydroxyazobenzene, 4-(Phenylazo)phenol, p-Phenylazophenol, p-Hydroxyazobenzene, C.I. Solvent Yellow 7, Pirocard Green 491, Organol Yellow AP, Phenol, p-(phenylazo)-, p-Benzeneazophenol, Azobenzene, 4-hydroxy-

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, 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 p-Hydroxy azobenzene?

The CAS Registry Number of p-Hydroxy azobenzene is 1689-82-3. It is also known as 4-Phenylazophenol, Solvent Yellow 7, 4-hydroxyazobenzene.

What is the molecular formula and molecular weight of p-Hydroxy azobenzene?

p-Hydroxy azobenzene has the molecular formula C12H10N2O and a molecular weight of 198.22 g/mol. Its IUPAC name is 4-phenyldiazenylphenol.

Which grade and pack sizes of p-Hydroxy azobenzene can I order?

We supply p-Hydroxy azobenzene in (98%) grade, in 25 g, 100 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with p-Hydroxy azobenzene?

Yes. Every lot of p-Hydroxy azobenzene 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 p-Hydroxy azobenzene be shipped internationally?

Yes. p-Hydroxy azobenzene 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.