CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Solid |
|---|---|
| Color/Form | Crystals |
| Melting Point | 174.5 °C |
| Solubility | 2.72e-01 g/L |
| LogP | 3.3 |
| Stability/Shelf Life | Following reconstitution of the commercially available lyophilized powder with sterile water for injection to a concentration of 5 mg/mL, phentolamine mesylate injection is stable for 48 hours at room temperature or 1 week at 2-8 °C; however, the manufacturer recommends that the reconstituted injection be used immediately and not stored. |
| Other Experimental Properties | log Kow = 0.31 at pH 7.5 |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P363:Wash contaminated clothing before reuse. P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P405:Store locked up. P501:Dispose of contents/container to..… |
COMPUTED DESCRIPTORS
| Molecular Weight | 281.35 g/mol |
|---|---|
| XLogP3 | 2.6 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 4 |
| Exact Mass | 281.152812238 g/mol |
| Monoisotopic Mass | 281.152812238 g/mol |
| Topological Polar Surface Area | 47.9 Ų |
| Heavy Atom Count | 21 |
| Formal Charge | 0 |
| Complexity | 363 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Phentolamine is a substituted aniline that is 3-aminophenol in which the hydrogens of the amino group are replaced by 4-methylphenyl and 4,5-dihydro-1H-imidazol-2-ylmethyl groups respectively. An alpha-adrenergic antagonist, it is used for the treatment of hypertension. It has a role as an alpha-adrenergic antagonist and a vasodilator agent. It is a member of imidazoles, a member of phenols, a tertiary amino compound and a substituted aniline.