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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 15227800Generated: October 23, 2026

3,5-Diiodo-O-(4-methoxyphenyl)-L-tyrosine

Levothyroxine Impurity 50 · 3,5-diiodo-O'-methyl-L-thyronine · Levothyroxine Sodium Impurity 11 · Levothyroxine Related Compound 10 · 3,5-Diiod-O-(4-methoxyphenyl)-L-tyrosine · L-Tyrosine,3,5-diiodo-o-(4-Methoxyphenyl) · 3,5-diiodo-o-(4-Methoxyphenyl)-L-Tyrosine · 2-amino-3-(3,5-diiodo-4-(4-methoxyphenoxy)phenyl)propanoic acid

https://huagongshe.com/en/chemical/15227800

3,5-Diiodo-O-(4-methoxyphenyl)-L-tyrosine molecular structure

Identifiers & Physical Properties

CAS No.94345-95-6
Molecular formulaC16H15I2NO4
Average molar mass539.1 g/mol
Monoisotopic mass538.90905396 g/mol
SMILESCOc1ccc(Oc2c(I)cc(C[C@H](N)C(=O)O)cc2I)cc1
InChIKeyUBTILXPOSFIMMG-AWEZNQCLSA-N
PubChem CID15227800
EC No.619-013-3
DTXSIDDTXSID901270730

Chemical & Physical Properties

XLogP1.4
Topological polar surface area81.8
Hydrogen bond donors2
Hydrogen bond acceptors5
Rotatable bonds6
Heavy atoms23
Formal charge0
Complexity378
Density1.98[at 20℃]
Vapor pressure0Pa at 25℃
GHS pictogramGHS08,GHS07
Signal wordWarning
GHS hazard statementsH317-H373
GHS precautionary statementsP260-P314-P501-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501
REACH registrationsActive

Safety & Regulations

GHS classificationWarningH317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]P260, P261, P272, P280, P302+P352, P319, P321, P333+P317, P362+P364, and P501 (click each P-code to see the statement)The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory.
Regulatory informationREACH registered substance: (2S)-2-amino-3-[3,5-diiodo-4-(4-methoxyphenoxy)phenyl]propanoic acid (EC: 619-013-3)
Hazard Classes and CategoriesSkin Sens. 1 (100%)
Signal wordWarning
GHS pictogramGHS08,GHS07
GHS hazard statementsH317-H373
REACH registrationsActive
GHS precautionary statementsP260-P314-P501-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501

Applications & Uses

Uses

(S)-2-Amino-3-(3,5-diiodo-4-(4-methoxyphenoxy)phenyl Propanoic Acid is a Levothyroxine impurity of Thyroxine (T425600), which is one of the thyroid hormones involved in the maintenance of metabolic homeostasis. Thyroxine is deiodinated in peripheral tissues to the active metabolite, liothyronine, which has been used to treat hyperlipidemia.