Description

Primosiston is a high-purity pharmaceutical intermediate and active ingredient, identified by CAS NO 37218-07-8. It is a critical compound valued for its specific biological activity and role in advanced synthesis. This product is essential for manufacturers in the pharmaceutical and life sciences sectors requiring reliable, high-quality raw materials for research, development, and production. We supply it to meet the stringent demands of global regulatory compliance and supply chain security.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of specific active pharmaceutical ingredients (APIs).
• Hormone Research & Development: Used in biochemical research and the development of therapeutic agents.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method validation in laboratories.
• Veterinary Pharmaceuticals: Employed in the formulation of specialized veterinary medicines.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects.
• Academic & Institutional Research: Utilized in university and institutional settings for pharmacological studies.

Basic Information

Product Name	Primosiston
CAS No.	37218-07-8
Molecular Formula	C22H30O2
Molecular Weight	326.47 g/mol
Synonyms	Allylestrenol; Gestanin; Gestanol; 17α-Allylestr-4-en-17β-ol; 17α-Allyl-19-nortestosterone; 17α-Allyl-19-norandrost-4-en-17β-ol; (17β)-17-Allylestr-4-en-17-ol; NSC-107679
EINECS	253-393-1

Quality Control

Our Primosiston is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, IR, and residual solvent analysis, to ensure it meets high-purity standards suitable for pharmaceutical applications. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming identity, purity, and conformance to agreed specifications.

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
Assay (HPLC)	≥ 98.5%
Related Substances (HPLC)	Total impurities ≤ 1.5%
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.