Kopexil (CAS 74638-76-9), also known as 2,4-diaminopyrimidine-3-oxide or Aminexil, is a low-molecular-weight heterocyclic compound structurally related to minoxidil. The molecule consists of a pyrimidine ring bearing two amino groups at the 2- and 4-positions and an N-oxide functionality at the 3-position.
Kopexil is a compound similar to minoxidil that promotes hair growth and treats hair loss by inhibiting 5α-reductase and possibly activating potassium channel switches. Kopexil works by prolonging the anagen phase of the hair growth cycle and improving blood circulation to hair follicles. Kopexil is not approved for use as a drug in the United States or Europe but is widely used in cosmetic hair care products. In vivo comparative studies have evaluated Kopexil against minoxidil for hair growth promotion, hair growth promoting factors, and toxicity.
Product Parameters
Parameter
Specification
Product Name
Kopexil
CAS Number
74638-76-9
Molecular Formula
C₄H₆N₄O
Molecular Weight
126.12 g/mol
Appearance
Typically exists as solid at room temperature
Density
1.69 ± 0.1 g/cm³ (predicted)
Boiling Point
475.5 ± 37.0 °C (predicted)
Flash Point
241.4 ± 26.5 °C
pKa
5.04 ± 0.47 (predicted)
Storage Condition
-20°C 3 years; 4°C 2 years; protect from moisture
Application
Heterocyclic organic compound, can be used as a pharmaceutical intermediate; it can also be used as a hair growth regulator.
Product Quality Assurance
Cosperpharm has established a comprehensive quality assurance system for Kopexil:
Thorough analytical characterization. Each batch undergoes multi-technique analytical release testing: HPLC purity verification (≥95% research grade; ≥98% high purity grade), appearance verification, solubility confirmation, and identity confirmation by NMR and mass spectrometry where applicable.
Full batch traceability. From raw material procurement through synthesis and final packaging, every step is fully documented and traceable. Each batch receives a unique lot number with retention samples maintained in accordance with Cosperpharm quality procedures.
Documentation ready for research use. Every shipment includes a Certificate of Analysis (COA) with batch-specific purity and characterization data, a Material Safety Data Sheet (SDS), and customs documentation for international delivery.
Contact Us
For hair growth research compounds and reference standards, Cosperpharm is your trusted partner. Contact our team today to discuss how Kopexil can support your research and development programs.
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