C15H10I4NNaO4
798.85 g/mol
APIDanger
Levothyroxine sodium
CAS55-03-8EC200-221-4
Category
API
Compound Class
Organic Acid
Primary Use
Pharmaceutical Raw Material
Levothyroxine sodium is the sodium salt of L-thyroxine, a compound used as a pharmaceutical raw material in replacement therapy. It is primarily supplied for manufacturing oral solid dosage forms and injectable preparations.
pharmaceutical raw material for hormone replacement formulationsactive ingredient in oral solid dosage forms
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
Levothyroxine sodium pentahydrate
CAS6106-07-6
pharmaceutical raw material
StrongSame Parent
Sodium levothyroxine hydrate
CAS25416-65-3
pharmaceutical raw material
SimilarStructure SimilarSimilarity 0.75
Liothyronine sodium
CAS55-06-1
pharmaceutical raw material
ReferenceSame Category
Scopolamine hydrochloride
CAS55-16-3
pharmaceutical raw material
ReferenceSame Category
(+/-)-norepinephrine hydrochloride
CAS55-27-6
pharmaceutical raw material
ReferenceSame Category
(+/-)-methyldopa
CAS55-40-3
pharmaceutical raw material
ReferenceSame Category
Atropine sulfate
CAS55-48-1
pharmaceutical raw material
Referencestereoisomer of
L-thyroxine zwitterion
CAS51-48-9
pharmaceutical raw material
Safety Reference
Danger
H361Suspected of damaging fertility or the unborn child
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Levothyroxine sodium (CAS 55-03-8) is 2937.90.
HS code (international, 6-digit)
2937.90
EU CN code (8-digit)
2937 90 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
sodium (2S)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoate
InChIKey
YDTFRJLNMPSCFM-YDALLXLXSA-M
SMILES
C1=C(C=C(C(=C1I)OC2=CC(=C(C(=C2)I)O)I)I)C[C@@H](C(=O)[O-])N.[Na+]
Synonyms (93)
- ERMEZA
- Levothyroxine sodique [INN-French]
- Levothyroxine sodium (INN)
- Levothyroxinum natricum [INN-Latin]
- Levotiroxina sodica [INN-Spanish]
- Berlthyrox
- Dathroid
- Eferox
- Euthyrox
- Eutirox
- Evotrox
- L-Thyroxine sodium
- L-Thyroxine sodium salt
- L-Thyroxine sodium xhydrate
- L-thyroxine henning
- Laevoxin
- Letter
- Levaxin
- Leventa
- Levo-T
- Levolet
- Levoroxine
- Levothroxine Sodium
- Levothyrox
- Levothyroxin-natrium
- Levothyroxine sodique
- Levothyroxine sodium
- Levothyroxine sodium tablets
- Levothyroxinum natricum
- Levotiroxina sodica
- Levoxyl
- Liotrix (t4)
- Novothyrox
- Oroxine
- Ro-thyroxine
- Roxstan
- Sodium L-thyroxine
- Sodium l-thyroxin
- Sodium levothyroxine
- Sodium thyroxin
- Sodium thyroxinate
- Sodium thyroxine
- Soloxine
- Synthroid sodium
- Tetroid
- Therapeutic Levothyroxine
- Thevier
- Thyradin
- Thyradin S
- Thyrax Sodium
- Thyro-L
- Thyro-Tabs
- Thyro-Tabs Canine
- ThyroKare
- ThyroVet
- ThyroVet Equine
- Thyroid hormone replacement
- Thyroid powder
- Thyrol L
- Thyronamin
- Thyrosit
- Thyroxevan
- Thyroxin sodium
- Thyroxine Soduim Salt
- Thyroxine sodique
- Thyroxine sodium
- Thyroxine sodium salt
- Thyroxinique
- Thyroxinum natricum
- Thyrozine
- Tiroidina
- Tirosint
- Tirosint-Sol
- Tyrosint
- Unithroid
- eltroxin
- l-Thyroxine monosodium salt
- levothroid
- levotiroxina de sodio
- synthroid
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