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3-β-Hydroxy-5-β-Pregnan-20-One CAS NO 128-21-2
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CAS No.:128-21-2
Grade:Pharmacy Grade
Content:99.0%
Brand:Customizable
Packaging:Customizable
Description
3-β-Hydroxy-5-β-Pregnan-20-One is a high-purity steroid derivative and a key intermediate in organic synthesis. This compound matters for its role as a crucial building block in the research and development of pharmaceutical actives and fine chemicals. It is primarily needed by manufacturers and R&D laboratories in the pharmaceutical, biotechnology, and life sciences sectors for producing steroid-based therapeutics and reference standards.
Application
- Pharmaceutical Intermediate: A critical precursor in the synthesis of various steroid-based drugs and active pharmaceutical ingredients (APIs).
- Biochemical Research: Used as a reference standard or starting material in metabolic pathway studies and endocrinology research.
- Fine Chemical Synthesis: Serves as a versatile building block for creating complex organic molecules in advanced chemical synthesis.
- Analytical Standard: Employed for method development, calibration, and quality control testing in analytical laboratories.
- Life Science Reagent: Utilized in cell culture studies and as a reagent for investigating biological processes.
Basic Information
| Product Name | 3-β-Hydroxy-5-β-Pregnan-20-One |
| CAS No. | 128-21-2 |
| Molecular Formula | C21H34O2 |
| Molecular Weight | 318.50 g/mol |
| Synonyms | Pregnanolone; 5β-Pregnane-3β-ol-20-one; 3β-Hydroxy-5β-pregnan-20-one; Allopregnanolone (isomer); 5β-Pregnanolone; 3β,5β-Tetrahydroprogesterone; NSC 12198; 20-Oxo-5β-pregnan-3β-ol |
| EINECS | 204-882-3 |
Quality Control
Our 3-β-Hydroxy-5-β-Pregnan-20-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets high-grade specifications suitable for research and synthesis. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.
Storage
Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials and sources of ignition.
Specification
| Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Identification (IR) | Conforms to structure |
| Assay (HPLC) | ≥ 98.0% |
| Melting Point | Contact for details |
| Loss on Drying | ≤ 0.5% |
| Residue on Ignition | ≤ 0.1% |
| Heavy Metals | ≤ 20 ppm |
Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.
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Why choose US
Trusted Manufacturer
With our own production facilities, we ensure consistent quality, reliable supply, and full traceability.
Rigorous Quality Assurance
Each batch undergoes strict QC, accompanied by COA, MSDS, and full compliance with international standards.
Advanced R&D Expertise
Our in-house lab drives process innovation, new product development, and tailored synthesis solutions.






