4-(Phenyldiazenyl)phenol

Also known as: p-Hydroxyazobenzene, 4-Hydroxyazobenzene, p-(Phenylazo)phenol, 4-(Phenylazo)phenol, Solvent Yellow 7, C.I. 11800, 4-Benzenazophenol, Phenol, 4-(phenylazo)-, Azobenzene, 4-hydroxy-

4-(Phenyldiazenyl)phenol (CAS 1689-82-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C12H10N2O and a molecular weight of 198.221 g/mol. Key properties include a melting point of 150-152 °C(lit.), a boiling point of 369.8±25.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 233.6±12.4 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1689-82-3
Jingsj CID: J-10719-7
Molecular Formula: C₁₂H₁₀N₂O
Molecular Weight: 198.221 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	150-152 °C(lit.)
Boiling Point	369.8±25.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	233.6±12.4 °C
Exact Mass	198.079315
PSA	44.95000
LogP	3.24
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.596

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2927000090
Summary	2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4-(Phenyldiazenyl)phenol?

The CAS number of 4-(Phenyldiazenyl)phenol is 1689-82-3.

What are the molecular formula and molecular weight of 4-(Phenyldiazenyl)phenol?

4-(Phenyldiazenyl)phenol has molecular formula C12H10N2O and molecular weight 198.221 g/mol.

Is 4-(Phenyldiazenyl)phenol hazardous?

4-(Phenyldiazenyl)phenol has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 4-(Phenyldiazenyl)phenol?

For 4-(Phenyldiazenyl)phenol, Upstream Products: Azoxybenzene, Phenol, Benzenediazonium tetrafluoroborate; Downstream Products: nitrobenzene, 2-hydroxy-5-(phenyldiazenyl)benzoic acid, 4'-Acetamidoacetophenone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "4-(Phenyldiazenyl)phenol (CAS 1689-82-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-10719-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.