L-Thyroxine
4 Inquiries
51-48-9
99%
Bottle,barrel,cargo,container,etc.
2026-07-06
Intermediates,Building blocks,API,Silicones,Peptides,Lab chemicals
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Product Description
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Seller Information
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Inquiry History
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DescriptionKeywords
L-Thyroxine
51-48-9
C15H11I4NO4
Quick DetailsProName:L-Thyroxine
CasNo:51-48-9
Molecular Formula:C15H11I4NO4
Appearance:powder, or liquid
Application:Pharmaceuticals, intermediates, APIs, custom synthesis, chemicals
DeliveryTime:5-7 Days
PackAge:Bottle, barrel, cargo, container, etc.
Port:Shanghai
Purity:99
Storage:Stored in room temperature, ventilated place
Transportation:By air, ship, express, etc.
LimitNum:0
Grade:Industrial Grade
SuperiorityBest Seller, High Quality, Competitive Price, Fast Delivery, Quick Response
DetailsLEAPChem supplies high quality Pharmaceuticals, intermediates, APIs, custom synthesis, fine chemicals and other industrial chemicalsBasic Info-
Product Name:
(-)-Thyroxine
Other Name:L-Tyrosine,O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-;Thyroxine,L-;O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosine;Thyroxine;Tetraiodothyronine;L-Thyroxine;3,3′,5,5′-Tetraiodo-L-thyronine;Levothyroxine;Thyroxin;(-)-Thyroxine;THX;T4;T4 (hormone);Thyreoideum;L-Thyroxin;L-T4;Thyroxinal;Thyrax;NSC 36397;Henning;Levotiron;SK&F 1-6528;74-16-8;587-29-1;587-30-4;7200-84-2;7488-70-2;1373931-44-2
CAS No.:51-48-9
Molecular Formula:C15H11I4NO4
InChIKeys:InChIKey=XUIIKFGFIJCVMT-LBPRGKRZSA-N
Molecular Weight:776.870
Exact Mass:776.87
EC Number:200-101-1
UNII:Q51BO43MG4
NSC Number:757434
DSSTox ID:DTXSID8023214
NCI Thesaurus Code:C62080
Color/Form:Crystals|Needles
ATC Code:H03AA01|H - Systemic hormonal preparations, excl. sex hormones and insulins
HScode:2922509090
Categories:
Characteristics-
PSA:
92.78000
XLogP3:2.4
Appearance:Solid
Density:2.6±0.1 g/cm3
Melting Point:235-236 °C (decomp)
Boiling Point:576.3±50.0 °C at 760 mmHg
Flash Point:302.3±30.1 °C
Refractive Index:1.795
Water Solubility:insoluble
Storage Conditions:Keep container tightly closed in a dry and well-ventilated place.
Vapor Pressure:2.05X10-16 mm Hg at 25 deg C (est)
Toxicity:TDLo oral in child: 328ug/kg
Specific rotation:Specific optical rotation: -4.4 deg at 20 °C/D (3% in 0.13N sodium hydroxide in 70% ethanol)
Henrys Law Constant:Henry's Law constant = 7.91X10-19 atm-cu m/mol at 25 °C (est)
Dissociation Constants:pKa1 = 0.27 (carboxylic); pKa2 = 7.43 (phenol); pKa3 = 9.43 (amine) (est)
Collision Cross Section:216.2 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]|194.19 Ų [M+Na-2H]- [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]|208.3 Ų [M-2H+Na]-
Experimental Properties:log Kow = 0.16-2.11|Occurs as the hydrate. Triclinic crystals or cream-colored powder; odorless, teasteless, somewhat hygroscopic. Density: 2.381 at 20 °C/4 °C. Specific optical rotation: -4.4 deg at 20 °C/D (C = 3 in 70% ethanol). Solubility in water (25 °C): about 15 mg/100 mL. Soluble in mineral acids and in solutions of alkalies it dissolves and hot solutions of alkyl carbonates. Slightly soluble in alcohol. Insoluble in acetone, chloroform, ether. pH of saturated water solution: 8.35 to 9.35 /Thyroxine sodium salt/|Needle-like crystals. Decomposes 231-233 °C. Insoluble in water, alcohol and in the other usual organic solvents; in the presence of mineral acids or alkalies it dissolves in alcohol; soluble in solutions of the alkali hydroxides and in hot solutions of the alkali carbonates /DL-Thyroxine/|Crystals, decoposes at 237 °C. Specific optical rotaion: +2.97 deg at 21 °C/546 mm Hg (0.74 g in 6 g og 0.5N sodium hydroxide and 14 g alcohol) /D-Thyroxine/
Hazard IdentificationClassification of the substance or mixture
Acute toxicity - Category 4, Oral
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Warning
Hazard statement(s) H302 Harmful if swallowed
Precautionary statement(s) Prevention P264 Wash ... thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Response P301+P317 IF SWALLOWED: Get medical help.
P330 Rinse mouth.
Storage none
Disposal P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Store at 25 deg C (77 deg F); excursions permitted to 15 deg -30 deg C (59 deg - 86 deg F).
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Seller Information
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Business Type:
Trader
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Main Products:
Intermediates,Building blocks,API,Silicones,Peptides,Lab chemicals
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Location:
Room A, 23rd Floor, No. 609 Yan'an Road, Gongshu District, Hangzhou, Zhejiang
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Payment Terms:
TT against copy of documents,D/P,L/C
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Average lead Time:
5
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Total Annual Revenue:
Above $100 million
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Year of Establishment:
2020
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Certifications:
ISO
">Company ProfileLEAPChem is a specialized fine chemical supplier for research, development and production.
LEAPChem provides nearly 200,000 rare and innovative chemical products to support the evolving needs of our customers in research & bulk manufacturing activities.
As a highly customer-oriented enterprise, we are committed to providing high-quality customer services and products to our global customers in a cost-effective and efficient manner.
Our client list includes many major pharmaceutical and science companies, universities, research institutions and chemical catalogue companies.
Methodology: Sound & Stable; Active & Innovative.
Attitude: Conscientious; Ingenious.
Goals: Customer's Satisfaction
We regard client's success as our success.
At LEAPChem, we strive to be the preferred supplier for efficiency increasing and cost lowering in your Research & Production.
To achieve this strategic vision, we always push ourselves to exceed our customer's requirement. By focusing on the aim of 'Beyond Your Expectation', we continually expand our product lines, and enhance our systematic management and human resources.
Welcome to contact us and we look forward to becoming your reliable and preferred partner.
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Inquiry History4 Inquiries
Country Product Purchase Quantity Date Posted 
Pakistan
Sodium Levothroxine
1 KG Mar 17, 2025 
India
Levothyroxine
25 KG May 8, 2026 
United States
Levothyroxine
10 MG Dec 17, 2025
United States
L-Thyroxine
1 KG Mar 17, 2026 Post an enquiry for this product
