L-Thyroxine-13C9,15N

SL-1991

L-Thyroxine-¹³C₉,¹⁵N, >98% (CP)

Isotopic Purity : 99 atom % 13C and 15N

Related CAS No. : [51-48-9] of the unlabelled compound

Synonyms : 3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-L-alanine-¹³C₉,¹⁵N; 3,3′,5,5'-Tetraiodo-L-thyronine-¹³C₉,¹⁵N; Levothyroxine-¹³C₉,¹⁵N; T₄ - ¹³C₉,¹⁵N

IUPAC Name : (R)-2-(Amino-¹⁵N)-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl-1,2,3,4,5,6-¹³C₆)propanoic-1,2,3-¹³C₃ acid

Price And Availability
Pack Size	Price in USD	Add To Shopping Cart	Availability	Shipping Status
5MG	Request A Quote		Back Order	Estimated to ship on 04 October 2026
10MG	Request A Quote		Back Order	Estimated to ship on 04 October 2026
25MG	Request A Quote		Back Order	Estimated to ship on 04 October 2026

Applications : L-Thyroxine-13C9,15N is a mixed labellled synthetic hormone in the treatment of hypothyroidism. DIO enzymes convert biologically active thyroid hormone (Triiodothyronine,T3) from L-Thyroxine (T4). This also can be used as internal reference standard.

References : Arici M. et al.: Endocr J. Jan 11,2018; Corriveau S. et al.: J. Clin Transl Endocrinol., 2(4), 144-149,2015.

Storage : Keep container tightly closed under nitrogen or argon and refrigerate for long-term shelf life.

Caution : In case of contact with skin or eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable protective clothing and gloves.