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ChemicalBook >> CAS DataBase List >> Lawesson's Reagent

Lawesson's Reagent

Lawesson's Reagent price.
  • $9 - $2195
  • Product name: Lawesson's Reagent
  • CAS: 19172-47-5
  • MF: C14H14O2P2S4
  • MW: 404.47
  • EINECS:242-855-4
  • MDL Number:MFCD00005171
  • Synonyms:AURORA KA-1707;4-METHOXYPHENYLTHIOPHOSPHORIC CYCLIC DI(THIOANHYDRIDE);2,4-DI(4-METHOXYPHENYL)-1,3,2LAMBDA-5,4LAMBDA-5-DITHIADIPHOSPHETANE-2,4-DITHIONE;P-METHOXYPHENYLTHIONOPHOSPHINE SULFIDE DIMER;P-METHOXYPHENYLTHIOPHOSPHINE SULFIDE, DIMER;2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulphide;2,4-Bis(methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide;Lawesson's Reagent [Sulfurating Reagent]
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  • ManufacturerAHH
  • Product numberMT-53147
  • Product descriptionLawessonsreagent 99%
  • Packaging500g
  • Price$300
  • Updated2021-12-16
  • Buy
  • ManufacturerAHH
  • Product numberMT-53147
  • Product descriptionLawessonsreagent 97%
  • Packaging500g
  • Price$300
  • Updated2026-05-25
  • Buy
  • ManufacturerAHH
  • Product numberMT-53147
  • Product descriptionLawessonsreagent 97%
  • Packaging500g
  • Price$300
  • Updated2026-05-26
  • Buy
  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent 98%
  • Packaging500g
  • Price$358
  • Updated2026-06-04
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  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent 98%
  • Packaging25g
  • Price$33
  • Updated2026-06-04
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  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent
  • Packaging100g
  • Price$90
  • Updated2021-12-16
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  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent 98%
  • Packaging100g
  • Price$101
  • Updated2026-06-04
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  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent
  • Packaging250g
  • Price$180
  • Updated2021-12-16
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  • ManufacturerAK Scientific
  • Product numberU721
  • Product descriptionLawesson reagent 98%
  • Packaging250g
  • Price$197
  • Updated2026-06-04
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  • ManufacturerAlichem
  • Product number19172475
  • Product description2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane2,4-disulfide
  • Packaging250g
  • Price$250.16
  • Updated2021-12-16
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  • ManufacturerAlichem
  • Product number19172475
  • Product description2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane2,4-disulfide
  • Packaging1000g
  • Price$612.56
  • Updated2021-12-16
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  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberING0005419
  • Product description2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00%
  • Packaging5G
  • Price$412
  • Updated2021-12-16
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  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberING0005419
  • Product description2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00%
  • Packaging10G
  • Price$424
  • Updated2021-12-16
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  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberING0005419
  • Product description2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00%
  • Packaging25G
  • Price$431
  • Updated2021-12-16
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  • ManufacturerAmerican Custom Chemicals Corporation
  • Product numberING0005419
  • Product description2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00%
  • Packaging100G
  • Price$524
  • Updated2021-12-16
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  • ManufacturerApolloscientific
  • Product numberOR5755
  • Product description2,4-Bis(4-methoxyphenyl)-2,4-dithioxo-1,3,2,4-dithiadiphosphetane 95%
  • Packaging5g
  • Price$28
  • Updated2026-06-04
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
AHH MT-53147 Lawessonsreagent 99% 500g $300 2021-12-16 Buy
AHH MT-53147 Lawessonsreagent 97% 500g $300 2026-05-25 Buy
AHH MT-53147 Lawessonsreagent 97% 500g $300 2026-05-26 Buy
AK Scientific U721 Lawesson reagent 98% 500g $358 2026-06-04 Buy
AK Scientific U721 Lawesson reagent 98% 25g $33 2026-06-04 Buy
AK Scientific U721 Lawesson reagent 100g $90 2021-12-16 Buy
AK Scientific U721 Lawesson reagent 98% 100g $101 2026-06-04 Buy
AK Scientific U721 Lawesson reagent 250g $180 2021-12-16 Buy
AK Scientific U721 Lawesson reagent 98% 250g $197 2026-06-04 Buy
Alichem 19172475 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane2,4-disulfide 250g $250.16 2021-12-16 Buy
Alichem 19172475 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane2,4-disulfide 1000g $612.56 2021-12-16 Buy
American Custom Chemicals Corporation ING0005419 2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00% 5G $412 2021-12-16 Buy
American Custom Chemicals Corporation ING0005419 2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00% 10G $424 2021-12-16 Buy
American Custom Chemicals Corporation ING0005419 2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00% 25G $431 2021-12-16 Buy
American Custom Chemicals Corporation ING0005419 2,4-BIS(4-METHOXYPHENYL)-2,4-DITHIOXO-1,3,2,4-DITHIADIPHOSPHETANE 95.00% 100G $524 2021-12-16 Buy
Apolloscientific OR5755 2,4-Bis(4-methoxyphenyl)-2,4-dithioxo-1,3,2,4-dithiadiphosphetane 95% 5g $28 2026-06-04 Buy

Properties

Melting point :228-230 °C(lit.)
Boiling point :525.8±60.0 °C(Predicted)
Density :1.48±0.1 g/cm3(Predicted)
storage temp. :Inert atmosphere,2-8°C
solubility :Chloroform (Slightly)
form :Powder
color :White to almost white
Water Solubility :Decomposition
Sensitive :Moisture Sensitive
Merck :14,5391
BRN :1024888
InChI :InChI=1S/C14H14O2P2S4/c1-15-11-3-7-13(8-4-11)17(19)21-18(20,22-17)14-9-5-12(16-2)6-10-14/h3-10H,1-2H3
InChIKey :CFHGBZLNZZVTAY-UHFFFAOYSA-N
SMILES :S1P(=S)(C2=CC=C(OC)C=C2)SP1(=S)C1=CC=C(OC)C=C1
CAS DataBase Reference :19172-47-5(CAS DataBase Reference)
EPA Substance Registry System :1,3,2,4-Dithiadiphosphetane, 2,4-bis(4-methoxyphenyl)-, 2,4-disulfide (19172-47-5)

Safety Information

Symbol(GHS): Flame (GHS02)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H261 In contact with water releases flammable gas Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases Category 2
Category 3
Danger
Warning
P231+P232, P280, P370+P378,P402+P404, P501
Precautionary statements:
P231+P232 Handle under inert gas. Protect from moisture.
P422 Store contents under …

Description

Lawesson's reagent, also known as Lloyd's reagent, is a commonly used chemical reagent in the preparation of organic sulfur compounds. At room temperature under normal pressure, it appears as the solid yellow powder with a strong smell of rotten. In 1956, it was first successfully produced by the reaction between arene and tetraphosphorus decasulfide. The Swedish chemist Sven-Olov Lawesson has carefully studied its reaction with organic compounds, so that its application has been greatly promoted, so the name also derived. The molecule of the Lawesson's reagent contains the four-membered ring structure alternately composed of sulfur and phosphorus.
Upon being heated, it undergoes depolymerization, generating two molecules of unstable ylide (R-PS2), which are the major reactive intermediates. Upon application of the Lawesson’s reagents with two different substitution groups for reaction, it has been observed of molecules with substituent group exchanged with each other in the 31 NMR spectrum of the product, confirming the existence of the intermediates, R-PS2.
Lawesson's reagent is an oxygen-sulfur exchange reagent with the most common application being for the preparation of thioamides and converting carbonyl compounds into sulfur carbonyl compounds. The reacted substrates can include ketone, ester, lactone, amide, lactam, and quinone. The electron-rich carbonyl groups are easier to react. Upon reaction with α, β-unsaturated aldehydes and ketones, the double bond is not affected.

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