Description

Cilest CAS NO 79871-54-8 is a high-purity pharmaceutical intermediate and active ingredient. This compound is critical for ensuring the quality and efficacy of final drug formulations in the pharmaceutical industry. It is primarily utilized by manufacturers in the production of specialized pharmaceutical products, where consistent purity and reliable supply are paramount.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs).
• Active Pharmaceutical Ingredient (API): Used as the primary active component in final drug formulations.
• Research & Development: Serves as a critical reference standard and starting material in pharmaceutical R&D laboratories.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for GMP production.
• Regulatory Submissions: Used to generate data for regulatory filings (e.g., DMF, CMC sections) with agencies like the FDA and EMA.
• Analytical Standard: Employed as a high-purity standard for method development and validation in quality control labs.

Basic Information

Product Name	Cilest
CAS No.	79871-54-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Norgestimate; (17α)-17-(Acetyloxy)-13-ethyl-18,19-dinorpregn-4-en-20-yn-3-one oxime; 13-Ethyl-17α-ethynyl-17β-hydroxy-4-gonen-3-one oxime acetate; Ethinylestradiol / Norgestimate; Ortho Tri-Cyclen component; Cilest® (brand name)
EINECS	Contact for details

Quality Control

Our Cilest is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets stringent pharmaceutical-grade specifications, including identity, purity, and impurity profile. Certificates of Analysis (COA) are provided and can be tailored to support regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (typically 15-25°C). Due to its hygroscopic nature, protect from moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%
Residual Solvents (GC)	Complies with ICH Q3C guidelines
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm

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