4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine

Also known as: 4-(5-Chloro-2-pyridylazo)-1,3-diaminobenzene, 4-[(5-Chloro-2-pyridinyl)azo]-1,3-benzenediamine, 1,3-Benzenediamine, 4-[2-(5-chloro-2-pyridinyl)diazenyl]-, 1,3-Benzenediamine, 4-[ (5-chloro-2-pyridinyl)azo]-, 4-((5-Chloropyridin-2-yl)diazenyl)benzene-1,3-diamine, 4-(5-Chloro-2-pyridylazo)-m-phenylenediamine, 5-Cl-PADAB, EINECS 251-334-0

4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine (CAS 33006-91-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H10ClN5 and a molecular weight of 247.684 g/mol. Key properties include a boiling point of 487.9±45.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 248.9±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33006-91-6
Jingsj CID: J-1504560-1
Molecular Formula: C₁₁H₁₀ClN₅
Molecular Weight: 247.684 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	487.9±45.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	248.9±28.7 °C
Exact Mass	247.062469
PSA	89.65000
LogP	1.58
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.702

Customs & Trade Information

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine?

The CAS number of 4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine is 33006-91-6.

What are the molecular formula and molecular weight of 4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine?

4-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine has molecular formula C11H10ClN5 and molecular weight 247.684 g/mol.

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-(5-Chloro-2-pyridylazo)-1,3-phenylenediamine (CAS 33006-91-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1504560-1 (accessed 2026-11-06).

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