IUPAC Name: 4-[N-(4,5-Dihydro-1H-imidazol-2-ylmethyl)-4-methylanilino]phenol hydrochloride
Canonical SMILES: CC1=CC=C(C=C1)N(CC2=NCCN2)C3=CC=C(C=C3)O.Cl
InChI: InChI=1S/C17H19N3O.ClH/c1-13-2-4-14(5-3-13)20(12-17-18-10-11-19-17)15-6-8-16(21)9-7-15;/h2-9,21H,10-12H2,1H3,(H,18,19);1H
InChIKey: JZYAMURVBSVJTK-UHFFFAOYSA-N
Molecular Weight: 317.8132 [g/mol]
Molecular Formula: C₁₇H₂₀ClN₃O
H-Bond Donor: 3
H-Bond Acceptor: 4 
EINECS: 200-793-5
Product Categories: Diagnostic; Intermediates & Fine Chemicals; Pharmaceuticals 
Solubility: methanol: 10 mg/mL, clear, colorless 
Index of Refraction:
Molar Refractivity: cm³
Molar Volume: cm³
Surface Tension: dyne/cm
Density: g/cm³
Flash Point: 297.9 °C
Enthalpy of Vaporization: 88.55 kJ/mol
Boiling Point: 569 °C at 760 mmHg
Vapour Pressure: 1.5E-13 mmHg at 25 °C
Melting Point: >230 (dec.)°C
Appearance: white to off-white powder
Classification Code of Phentolamine hydrochloride (CAS NO.73-05-2): Drug / Therapeutic Agent

 Phentolamine hydrochloride (CAS NO.73-05-2) is used as an adrenergic blocking agent and an antihypertensive. It is also used for the treatment of pheochromocytoma.

Hazard Codes: Xn,C
Risk Statements: 22-34 
R22:Harmful if swallowed. 
R34:Causes burns.
Safety Statements: 22-24/25-45-36/37/39-27-26 
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S27:Take off immediately all contaminated clothing. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: 3249
WGK Germany: 3
RTECS: SL0701000
HazardClass: 6.1(b)
PackingGroup: III

  Phentolamine hydrochloride (CAS NO.73-05-2), its Synonyms are 3-(((4,5-Dihydro-1H-imidazol-2-yl)methyl)(4-methylphenyl)amino)phenol hydrochloride ; Phenol, 3-(((4,5-dihydro-1H-imidazol-2-yl)methyl)(4-methylphenyl)amino), monohydrochloride ; Phentolamine HCl ; Phentolamine chloride ; Regitine hydrochloride ; m-(N-(2-Imidazolin-2-ylmethyl)-p-toluidino)phenol monohydrochloride ; Phenol, m-(N-(2-imidazolin-2-ylmethyl)-p-toluidino)-, monohydrochloride (8CI) .