Levothyroxine EP impurity B

SL-1287

Levothyroxine EP impurity B, >96%

CAS No. : [1628720-66-0]

Synonyms : 3-Chlorothyroxine

IUPAC Name : (S)-2-Amino-3-(4-(3-chloro-4-hydroxy-5-iodophenoxy)-3,5-diiodophenyl)propanoic acid

Price And Availability
Pack Size	Price in USD	Add To Shopping Cart	Availability	Shipping Status
25MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
50MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
100MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
250MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
500MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026

Applications : This is an impurity of L-Thyroxine (Levothyroxine EP impurity B), which is a synthetic hormone in the treatment of hypothyroidism. DIO enzymes convert biologically active thyroid hormone (Triiodothyronine,T3) from L-Thyroxine (T4).

References : Arici M. et al.: Endocr J. 65(3), 317, 2018; Corriveau S. et al.: J. Clin Transl Endocrinol. 2(4),144, 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.