Yohimbine

CAS Number
146-48-5
EC Number
205-672-0

What is Yohimbine?

Yohimbine (CAS 146-48-5), also known as Johimbin, is an indole alkaloid extracted from the bark of the West African Yohimbe tree.

Where is Yohimbine used?

  • Pharmaceutical manufacturing: active substance in prescription and over-the-counter products targeting adrenergic pathways
  • QC laboratories: reference standard and analytical reagent validating alkaloid-based drug formulations
  • Research institutions and contract manufacturers: intermediate for synthesizing structurally related compounds and pharmacological study tools
  • Specialty supplement manufacturers operating under applicable regulatory frameworks procure it for dosage forms.

Good to know: It functions as an alpha-2 adrenergic receptor antagonist. The hydrochloride salt form — yohimbine HCl — is the most commercially prevalent specification.

Commercial specifications

  • Pharmaceutical-grade material meeting defined purity thresholds, typically ≥98% by HPLC
  • Documentation suitable for USP and BP environments
  • High-purity batches comply with ACS specifications

Other Names (Synonyms)

Yohimbin|Yohimbic acid methyl ester|Johimbin|Corynine|Aphrodine|Actibine®|17alpha-Hydroxyyohimban-16alpha-carboxylic acid methyl ester|(16alpha,17alpha)-17-Hydroxyyohimban-16-carboxylic acid methyl ester

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What are the physical properties of Yohimbine?

Melting Point 241 °C
Boiling Point 487.66°C (rough estimate)
Density 1.1640 (rough estimate)
Appearance Glistening, needle-like alkaloid, soluble in alcohol and ether, very slightly soluble in water.
Color Beige
Form Solid
Refractive Index 1.6500 (estimate)
Log P 2.730

How is Yohimbine classified and handled safely? Learn More

Danger
GHS06· Toxic

Hazard Statements

H301 Toxic if swallowed
H311 Toxic in contact with skin
H331 Toxic if inhaled

Precautionary Statements

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
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