Levothyroxine sodium
Also known as: L-Thyroxine sodium, L-Thyroxine monosodium salt, L-Thyroxine sodium salt, Sodium levothyroxine, Levothyroxine sodium anhydrous, Sodium L-thyroxine, Sodium (2S)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoate, Synthroid, Eltroxin, Euthyrox, Levaxin, Levothroid, Levoxyl, Oroxine, Thyro-Tabs, 3,3',5,5'-Tetraiodo-L-thyronine monosodium salt, O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine monosodium salt, L-Tyrosine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-, monosodium salt, EINECS 200-221-4
Levothyroxine sodium (CAS 55-03-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C15H10I4NNaO4 and a molecular weight of 798.852 g/mol. Key properties include a melting point of 207-210 (dec.)(lit.)ºC, a boiling point of 576.3ºC at 760 mmHg and a flash point of 302.3ºC. It is listed by 1 supplier, from 147.20 to 456.00 CNY. Record last updated Nov 2, 2026.
- CAS No.
- 55-03-8
- Jingsj CID
- J-1956901-1
- Molecular Formula
- C15H10I4NNaO4
- Molecular Weight
- 798.852 g/mol
- Category
- Organic Compounds
- Last updated
- 11/2/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | 98% 5g | ¥736.00 | $22.03 /gBest ¥147.20/g CNY | CN China MOQ 5g | |
In Stock | 98% 1g | ¥456.00 | $68.24 /g ¥456.00/g CNY | CN China MOQ 1g |
Physicochemical Properties
| Melting Point | 207-210 (dec.)(lit.)ºC |
|---|---|
| Boiling Point | 576.3ºC at 760 mmHg |
| Flash Point | 302.3ºC |
| Exact Mass | 798.668579 |
| PSA | 141.76000 |
| LogP | 3.60140 |
Activity & Biological Data
| Additional Information | [1]. Arici M, et al. Association between genetic polymorphism and levothyroxine bioavailability in hypothyroid patients. Endocr J. 2018 Mar 28;65(3):317-323. [2]. Corriveau S, et al. Levothyroxine treatment generates an abnormal uterine contractility patterns in an in vitro animalmodel. J Clin Transl Endocrinol. 2015 Sep 9;2(4):144-149. |
|---|
Frequently Asked Questions
What is the CAS number of Levothyroxine sodium?
The CAS number of Levothyroxine sodium is 55-03-8.
What are the molecular formula and molecular weight of Levothyroxine sodium?
Levothyroxine sodium has molecular formula C15H10I4NNaO4 and molecular weight 798.852 g/mol.
Which suppliers offer Levothyroxine sodium?
1 supplier(s) listed; reference unit price ¥147.20–456.00 /g.
What are the upstream and downstream products of Levothyroxine sodium?
For Levothyroxine sodium, Upstream Products: L-Thyroxine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Levothyroxine sodium (CAS 55-03-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1956901-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.