L-Thyroxine,
4 Inquiries
51-48-9
98%
shanghai
bag
2026-04-17
Di-n-butyl naphthalene-2,6-dicarboxylate
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Product Description
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Seller Information
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Inquiry History
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DescriptionBasic Info
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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:
Di-n-butyl naphthalene-2,6-dicarboxylate
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Location:
1208# HuaCe Building-B,Wuchanggang Road,XIHU District,Hangzhou City,Zhejiang Province ,China
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Payment Terms:
TT against copy of documents,L/C,TT against B/L draft before shipment,100% TT in advance
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Average lead Time:
15
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Total Annual Revenue:
$5 million-$10 million
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Total Employees:
5-10
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Year of Establishment:
2023
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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
