Description

Dl-Estrone CAS NO 19973-76-3 is a synthetic steroid compound, specifically a racemic mixture of the estrogenic hormone estrone. This compound is a critical intermediate and reference standard in the research and development of steroidal pharmaceuticals and biochemical studies. It is essential for scientists and manufacturers in the pharmaceutical, biotechnology, and academic research sectors who require high-purity steroid building blocks for synthesis, analytical method development, and biological evaluation.

Application

• Pharmaceutical Intermediate: Serves as a key chiral building block in the synthesis of complex steroidal drugs and hormone therapies.
• Biochemical Research: Used as a reference standard and reagent in studies investigating estrogen receptor binding, metabolic pathways, and endocrine function.
• Analytical Chemistry: Employed as a high-purity standard for calibrating equipment and validating methods in HPLC, GC-MS, and other analytical techniques.
• Academic & Institutional Research: Provides a foundational compound for university and laboratory research into steroid chemistry and biology.
• Method Development: Utilized in the development and optimization of chromatographic separation protocols for stereoisomers.

Basic Information

Product Name	Dl-Estrone
CAS No.	19973-76-3
Molecular Formula	C18H22O2
Molecular Weight	270.37 g/mol
Synonyms	(±)-Estrone; DL-Estrone; rac-Estrone; 3-Hydroxy-1,3,5(10)-estratrien-17-one; Estrone Racemate; 17-Oxoestra-1,3,5(10)-trien-3-ol; NSC 9894
EINECS	243-399-6

Quality Control

Our Dl-Estrone is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide detailed Certificates of Analysis (COA) that include results from HPLC, IR, and other relevant pharmacopeial methods. Our quality commitment supports applications requiring high-purity reference materials and pharmaceutical intermediates.

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 each use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Specific Rotation	N/A (Racemic mixture)
Related Substances (HPLC)	Individual impurity ≤ 0.5%
Total Impurities	≤ 2.0%

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