Description

4,5β-Dihydro Norethandrolone is a synthetic anabolic-androgenic steroid (AAS) derivative, specifically a dihydro analogue of norethandrolone. This compound is of significant interest in pharmaceutical research and development for its potential metabolic and tissue-selective effects. It is primarily utilized by research institutions and pharmaceutical companies engaged in the development of therapeutic agents for conditions related to muscle wasting, osteoporosis, and hormonal regulation. The product, identified by CAS NO 31658-44-3, is supplied to meet the stringent demands of advanced chemical synthesis and analytical research.

Application

• Pharmaceutical Reference Standard: Serves as a high-purity chemical standard for quality control and analytical method development in drug manufacturing.
• Biochemical Research: Used in preclinical studies to investigate the mechanisms of action, metabolism, and structure-activity relationships (SAR) of anabolic steroids.
• Active Pharmaceutical Ingredient (API) Intermediate: Acts as a key synthetic intermediate in the production pathway for specialized steroid-based pharmaceuticals.
• Metabolic Studies: Employed in research focused on androgen receptor modulation and its effects on protein synthesis and nitrogen retention.
• Veterinary Pharmaceutical Development: Potential application in research for developing treatments aimed at improving lean mass and recovery in animals.

Basic Information

Product Name	4,5β-Dihydro Norethandrolone
CAS No.	31658-44-3
Molecular Formula	C₂₀H₃₀O₃
Molecular Weight	318.45 g/mol
Synonyms	17α-Ethyl-4,5α-dihydro-19-nortestosterone; 17α-Ethyl-19-nor-4,5α-dihydrotestosterone; 4,5α-Dihydronorethandrolone; 19-Nor-4,5α-dihydro-17α-ethyltestosterone; 4,5-Dihydronorethandrolone; 17α-Ethyl-19-norandrost-4-en-17β-ol-3-one (dihydro form); Nilevar Dihydro Derivative
EINECS	Contact for details

Quality Control

Our 4,5β-Dihydro Norethandrolone is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods (IR, NMR), to ensure it meets the high standards required for research and development purposes. A Certificate of Analysis (COA) detailing all test results and specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%
Residual Solvents (GC)	Complies with ICH Q3C guidelines
Loss on Drying	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.