Chinese Name: Levothyroxine Sodium

Chinese Alias: L-Thyroxine Sodium; Sodium 3,5,3',5'-Tetraiodothyronine

English Name: Levothyroxine Sodium

English Alias: L-Thyroxine Sodium Salt; Sodium 4-O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine

CAS Number: 55-03-8

EINECS Number: 200-221-4

Molecular Formula: C15H10I4NNaO4

Molecular Weight: 798.86

Properties: Off-white crystalline powder. Solubility in water at 25°C is approximately 15mg/100ml, with a saturated aqueous solution pH of 8.35-9.35. Odorless and tasteless.

Application: This product is used as a thyroid hormone replacement therapy drug. Function and Application: It is a synthetic sodium salt of tetraiodothyronine, with functions and applications similar to thyroid tablets. Oral absorption is 50%, with a slow and steady onset, closely resembling physiological hormones. It is suitable for thyroid hormone replacement therapy, treatment of simple goiter, post-thyroidectomy to prevent recurrence of goiter, and as a supplementary treatment for hypothyroidism due to various causes.

Safety Instructions: Do not inhale dust; avoid skin and eye contact.

Storage: Store away from light, sealed, and at low temperatures.