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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 71316964Generated: October 23, 2026

N-Formyl thyroxine

n formylt4 · N-ForMyl Thyroxine · Levothyroxine Impurity 1 · Levothyroxine impurity 8 · Levothyroxine Impurity 12 · Levothyroxine USP Impurity C · Levothyroxine N-Formyl Impurity · Levothyroxine Sodium Impurity C

https://huagongshe.com/en/chemical/71316964

N-Formyl thyroxine molecular structure

Identifiers & Physical Properties

CAS No.671235-41-9
Molecular formulaC16H11I4NO5
Average molar mass804.88 g/mol
Monoisotopic mass804.68161445 g/mol
SMILESO=CN[C@@H](Cc1cc(I)c(Oc2cc(I)c(O)c(I)c2)c(I)c1)C(=O)O
InChIKeyDNRNTTVIRGKKSQ-ZDUSSCGKSA-N
PubChem CID71316964
DTXSIDDTXSID30217422

Chemical & Physical Properties

XLogP4.9
Topological polar surface area95.9
Hydrogen bond donors3
Hydrogen bond acceptors5
Rotatable bonds6
Heavy atoms26
Formal charge0
Complexity475
Melting point>192°C (dec.)
Storage conditionsHygroscopic, Refrigerator, under inert atmosphere
SolubilityDMSO (Slightly), Methanol (Slightly, Sonicated)
Physical stateSolid
ColorWhite to Off-White
FDA UNII4JQ6559BER

Applications & Uses

Uses

N-Formyl Thyroxine (Levothyroxine N-Formyl Impurity; N-Formyl-T4 (USP)) is a thyroxine derivative which showed less thyroid activity than Thyroxine Sodium (T425601).