Levothyroxine USB A impurity

SL-1269

Levothyroxine USB A impurity, >98%

CAS No. : [107849-54-7]

MDL No. : MFCD28358813

Synonyms : O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodobetahydroxy-L-tyrosine; Levothyroxine beta-hydroxy impurity; Levothyroxine beta-hydroxy T4 impurity; β-Hydroxy thyroxine

IUPAC Name : (2S)-2-Amino-3-hydroxy-3-[4-(4-hydroxy-3,5- diiodophenoxy)-3,5-diiodophenyl]propanoic acid

Price And Availability
Pack Size	Price in USD	Add To Shopping Cart	Availability	Shipping Status
5MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
10MG	Request A Quote		In Stock	Estimated to ship on 20 September 2026
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

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

References : Yamauchi K. et al.: J. Biol. Chem., 274, 8460, 1999; Davis P. et al.: J. Endocrinol. Invest., 25, 377, 2002.

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.