Levothyroxine Sodium
Pharmaceutical-grade Levothyroxine Sodium (CAS 25416-65-3), min. 99.0%, supplied wholesale by Zyntex to licensed producers. Low-dose thyroid hormone API for tablets, oral solutions and veterinary products. CoA and SDS with every lot.
Description
Levothyroxine Sodium Product Overview
Levothyroxine sodium is the sodium salt of the L-isomer of thyroxine (T4), usually supplied as the pentahydrate (CAS 25416-65-3; anhydrous 55-03-8). It is a white to off-white powder that is very slightly soluble in water and sensitive to light, heat and moisture.
Pharmaceutical companies use it in tablets, soft capsules and oral solutions for thyroid hormone replacement, and veterinary producers use it for dogs. Doses are in the microgram range and the effective dose range is narrow, so regulators set tight limits on content uniformity and stability throughout shelf life. The faster-acting hormone T3 is available as Liothyronine Sodium.
Zyntex supplies levothyroxine sodium from qualified producers with lot-specific documentation, only to licensed pharmaceutical and veterinary companies.
Key Applications of Levothyroxine Sodium
Main application areas:
💊 Tablets
Low-dose API for thyroid hormone tablets.
💧 Oral Solutions
API for liquid formulations.
🐕 Veterinary Products
API for tablets for dogs.
🔬 Generic Development
Development and reference material.
Levothyroxine Sodium Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Levothyroxine Sodium |
| CAS Number | 25416-65-3 (pentahydrate; anhydrous: 55-03-8) |
| Assay / Purity | Min 99.0% |
| Appearance | White to off-white powder |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Potent hormone; may cause damage to organs through prolonged or repeated exposure. Avoid inhalation of dust and contact with skin; handle with gloves, eye protection and respiratory protection. Store in tightly closed, light-resistant containers in a cool place, protected from moisture. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Frequently Asked Questions
Why is content uniformity so important for levothyroxine?
Tablets contain only micrograms of API and the effective dose range is narrow, so each tablet must contain exactly the labeled dose.
What is the difference from liothyronine?
Levothyroxine is T4, which the body converts to the active hormone T3. Liothyronine is T3 itself and acts faster.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.
