Minoxidil

CAS Number
38304-91-5
EC Number
253-874-2

What is Minoxidil?

Minoxidil (CAS 38304-91-5), also marketed as Rogaine® and Regaine, is an active pharmaceutical ingredient used in topical and oral formulations targeting hair loss.

Where is Minoxidil used?

  • Topical hair care: active ingredient in scalp solutions and foams at defined concentrations
  • OTC products: incorporated into finished-dose products for regulated markets in North America, Europe and Asia-Pacific
  • Compounding pharmacies: customized topical preparations, including combination formulations with other actives
  • Oral tablets prescribed off-label for hair loss drive procurement volumes.

Good to know: Originally developed as an antihypertensive, it is now the most commercially established API for androgenetic alopecia.

Commercial specifications

  • Quantities from research-scale packaging through bulk API volumes

Other Names (Synonyms)

Rogaine®|Regaine|Minoximen|Lonolox|Apo-gain|Alostil|6-Piperidin-1-ylpyrimidine-2,4-diamine 3-oxide|2,4-Diamino-6-piperidinopyrimidine 3-oxide

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What are the physical properties of Minoxidil?

Melting Point 248 °C
Boiling Point 348.61°C (rough estimate)
Density 1.1651 (rough estimate)
Appearance White Crystalline Solid
Color White
Form neat
Water Solubility Soluble in water (2.2 mg/ml), 100% ethanol (29 mg/ml), propylene glycol, acetone, DMSO (6.5 mg/ml), and methanol.
Refractive Index 1.7610 (estimate)

Which trade and regulatory codes apply to Minoxidil?

HS Code 29335900
Storage Class 11 - Combustible Solids
WGK (Germany) 3
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