Phentolamine hydrochloride

盐酸酚妥拉明

Also known as: Phentolamine HCl, Regitine hydrochloride, 3-[[(4,5-Dihydro-1H-imidazol-2-yl)methyl](4-methylphenyl)amino]phenol hydrochloride, 3-[4,5-Dihydro-1H-imidazol-2-ylmethyl-(4-methylphenyl)amino]phenol hydrochloride, 2-[N-(3-Hydroxyphenyl)-p-toluidinomethyl]-2-imidazolidine hydrochloride, 2-[N-(m-Hydroxyphenyl)-p-toluidinomethyl]imidazoline Hydrochloride, 3-(((4,5-Dihydro-1H-imidazol-2-yl)methyl)(4-methylphenyl)amino)phenol Hydrochloride, 3-[N-(4,5-Dihydro-1H-imidazol-2-ylmethyl)-p-toluidino]phenol hydrochloride, m-(N-(2-Imidazolin-2-ylmethyl)-p-toluidino)phenol monohydrochloride, Fentolamine Hydrochloride, Phentolamine hydrochloride (Regitine hydrochloride)

Phentolamine hydrochloride (CAS 73-05-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C17H20ClN3O and a molecular weight of 317.813 g/mol. It is also known as Phentolamine HCl, Regitine hydrochloride and 3-[[(4,5-Dihydro-1H-imidazol-2-yl)methyl](4-methylphenyl)amino]phenol hydrochloride. Key properties include a melting point of >230ºC(dec.), a boiling point of 569ºC at 760 mmHg and a flash point of 297.9ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
73-05-2
Jingsj CID
J-1368074-9
Molecular Formula
C17H20ClN3O
Chinese Name
盐酸酚妥拉明
Molecular Weight
317.813 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point>230ºC(dec.)
Boiling Point569ºC at 760 mmHg
Flash Point297.9ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of Phentolamine hydrochloride?

The CAS number of Phentolamine hydrochloride is 73-05-2.

What are the molecular formula and molecular weight of Phentolamine hydrochloride?

Phentolamine hydrochloride has molecular formula C17H20ClN3O and molecular weight 317.813 g/mol.

Is Phentolamine hydrochloride hazardous?

Phentolamine hydrochloride has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "Phentolamine hydrochloride (CAS 73-05-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1368074-9 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.