Description

Dl-Thyroxine Sodium Salt CAS NO 1491-91-4 is the racemic sodium salt form of thyroxine, a synthetic thyroid hormone. This compound is a critical intermediate and reference standard in pharmaceutical research and development, particularly for thyroid-related therapeutics. It is essential for manufacturers and research institutions focused on endocrinology, metabolic studies, and the production of analytical standards.

Application

• Pharmaceutical Reference Standard: Used as a primary standard in the quality control and assay development of thyroid hormone medications.
• Biochemical Research: Serves as a key reagent in metabolic and endocrine pathway studies, including receptor binding assays.
• Active Pharmaceutical Ingredient (API) Intermediate: Employed in the synthesis and development of thyroid hormone replacement drugs.
• Diagnostic Kit Manufacturing: Utilized in the production of calibration standards for in-vitro diagnostic tests measuring thyroid function (e.g., T4 tests).
• Veterinary Medicine: Applied in research and formulation for veterinary thyroid treatments.

Basic Information

Product Name	Dl-Thyroxine Sodium Salt
CAS No.	1491-91-4
Molecular Formula	C15H10I4NNaO4
Molecular Weight	798.86 g/mol
Synonyms	DL-Thyroxine Sodium; Levothyroxine Sodium Salt (racemic); T4 Sodium Salt (racemic); 3,5,3',5'-Tetraiodo-DL-thyronine Sodium Salt; Thyroxine Sodium (DL); Sodium DL-Thyroxine; (±)-Thyroxine Sodium Salt; O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine Sodium Salt
EINECS	216-070-5

Quality Control

Our Dl-Thyroxine Sodium Salt is produced and tested under a rigorous quality management system. We offer grades suitable for research and development, with a focus on consistent purity and identity. Certificates of Analysis (COA) documenting key parameters such as assay, related substances, and identification are provided with each batch to ensure traceability and compliance with your specifications.

Storage

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

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Heavy Metals	≤ 20 ppm

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