Description

Iodine 125 is a synthetic radioisotope of iodine, specifically identified by CAS NO 17144-19-3. This high-specific-activity material is critical for applications requiring precise, low-energy gamma and X-ray emissions. It is an essential component for research, diagnostic, and therapeutic applications in the life sciences and medical sectors. Industries requiring reliable, high-purity radioisotopes for labeling, imaging, and targeted radiotherapy depend on consistent quality and supply chain integrity.

Application

• Radioimmunoassay (RIA) and In Vitro Diagnostics: Used as a tracer for labeling antibodies, antigens, and other biomolecules to detect hormones, drugs, and infectious agents.
• Medical Imaging and Brachytherapy: Employed in the manufacture of sealed sources for the treatment of prostate cancer and other malignancies, as well as in imaging seeds.
• Life Science Research: Critical for metabolic studies, protein labeling, receptor binding assays, and other tracer techniques in biochemistry and molecular biology.
• Pharmaceutical Development: Utilized in drug discovery and development for pharmacokinetic and biodistribution studies of new chemical entities.
• Industrial Gauging and Analysis: Applied in certain non-destructive testing equipment and analytical instruments for thickness and density measurements.
• Nuclear Medicine Precursor: Serves as a starting material for synthesizing more complex radiopharmaceuticals and diagnostic agents.

Basic Information

Product Name	Iodine 125
CAS No.	17144-19-3
Molecular Formula	¹²⁵I
Molecular Weight	124.904 g/mol
Synonyms	Iodine-125; ¹²⁵I; Radioiodine (¹²⁵I); I-125; Iodine 125 isotope; UN 2910 (Radioactive material, n.o.s.); (125)Iodine
EINECS	Contact for details

Quality Control

Every batch of Iodine 125 is produced and tested under strict quality management systems, adhering to cGMP guidelines where applicable. Our products undergo rigorous quality testing to ensure compliance with industry standards for radionuclidic purity, radiochemical purity, specific activity, and pH. Certificates of Analysis (COA) detailing all test results, including gamma spectroscopy and HPLC analysis, are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a designated, shielded radioactive materials area at controlled room temperature (15-25°C) in accordance with all local, national, and international regulations for the handling and storage of radioactive substances. The storage facility must provide appropriate radiation shielding and containment.

Specification

Item	Specification
Appearance	Clear, colorless solution
Radionuclidic Identity (Gamma Spectroscopy)	Conforms to ¹²⁵I
Radionuclidic Purity	≥ 99.9%
Radiochemical Purity (HPLC/TLC)	≥ 95.0%
Specific Activity	Contact for details
Concentration	As specified per order (mCi/mL, GBq/mL)
pH	7.0 - 9.0
Carrier Content	≤ 0.1 µg Iodide per mCi

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