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A7684812

L-Thyroxine , 98% , 51-48-9

Synonym(s):
L-Thyroxine;3,3′,5,5″-Tetraiodo-L-thyronine;3-[4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]-L-alanine;T4

CAS NO.:51-48-9

Empirical Formula: C15H11I4NO4

Molecular Weight: 776.87

MDL number: MFCD00002596

EINECS: 200-101-1

Pack Size Price Stock Quantity
1G RMB84.00 In Stock
5G RMB279.20 In Stock
25G RMB1116.00 In Stock
100G RMB3173.60 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 235 °C
alpha  -5 º (1N NaOH:EtOH 1:2)
Density  2.4440 (estimate)
Flash point: 9℃
storage temp.  Keep in dark place,Inert atmosphere,2-8°C
solubility  Dissolves in 4M ammonium hydroxide in Methanol at 50mg/ml
pka 2.2(at 25℃)
Boiling point: 576.3±50.0 °C(Predicted)
form  Powder
color  White to Pale Brown
optical activity -4.5 to -5.7 [1 mol dm-3 NaOH-ethanol (1:2)] +15 [1 mol dm-3 HCl-95% ethanol (1:2)]
Water Solubility  insoluble
Sensitive  Light Sensitive
Merck  9491
BRN  2228515
InChIKey XUIIKFGFIJCVMT-LBPRGKRZSA-N
CAS DataBase Reference 51-48-9(CAS DataBase Reference)
EPA Substance Registry System L-Thyroxine (51-48-9)

Description and Uses

L-Thyroxine is a synthetic form of the thyroid hormone thyroxine. In vivo, L-thyroxine (0.9 and 2.7 μg) inhibits synthesis and release of thyrotropin induced by thyrotropin-releasing hormone from the anterior pituitary in mice. It also reverses decreases in levels of circulating thymic serum factor (FTS) and the number of T rosette-forming cells in an old age-induced mouse model of hypothyroidism. Formulations containing L-thyroxine have been used in the treatment of hypothyroidism.

Thyroxine is one of the thyroid hormones involved in the maintenance of metabolic homeostasis. Synthesized and stored as amino acid residues of thyroglobulin, the major protein component of the thyroid follicular colloid. Synthesis and secretion are regulated by the pituitary hormone (TSH). Deiodinated in peripheral tissues to the active metabolite, liothyronine. The D-form has very little activity as a thyroid hormone, but has been used to treat hyperlipidemia.

Safety

Symbol(GHS) 
GHS02,GHS06,GHS08
Signal word  Danger
Hazard statements  H225-H301+H311+H331-H370
Precautionary statements  P210-P260-P280-P301+P310+P330-P302+P352+P312-P370+P378
Hazard Codes  Xn,T,F
Risk Statements  40-39/23/24/25-23/24/25-11
Safety Statements  22-24/25-36-45-36/37-16
RIDADR  UN1230 - class 3 - PG 2 - Methanol, solution
WGK Germany  3
RTECS  YP2833500
8-10
TSCA  Yes
HazardClass  IRRITANT
HS Code  29379000
Hazardous Substances Data 51-48-9(Hazardous Substances Data)
Toxicity TDLo oral in child: 328ug/kg

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