Lawesson's reagent
Buy Lawesson's reagent (CAS 19172-47-5) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-000875.
About Lawesson's reagent
Lawesson's reagent sits in our synthetic, Protecting & Derivatization Reagents section and ships worldwide from stock or short lead time. Key data (97%): CAS 19172-47-5, formula C14H14O2P2S4 and molar mass 404.5 g/mol. It is described as powder.
Common uses in the lab and plant
- Organic synthesis
- Reaction development
- Medicinal chemistry
- Catalysis
Handling and storage
Reported physical data: melting point 228-230 °C. Hazard communication follows GHS (Danger: H261, H302, H312 and H332). Our SDS lists exposure controls and first-aid measures.
Available as 25 g, 100 g, 5 x 1 kg and 4 x 25 kg. Larger or split packs can be arranged. You receive a batch certificate of analysis and a 16-section SDS with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.
Typical uses
- Organic synthesis
- Reaction development
- Medicinal chemistry
- Catalysis
Applications
Specifications and identifiers
| Product name | Lawesson's reagent |
|---|---|
| Catalogue number | ZX-000875 |
| CAS number | 19172-47-5 |
| IUPAC name | 2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2lambda5,4lambda5-dithiadiphosphetane |
| Molecular formula | C14H14O2P2S4 |
| Molar mass | 404.5 g/mol |
| Exact mass | 403.9352 |
| Purity / assay | 97% |
| Physical form | Powder |
| Appearance | Powder |
| Melting point | 228-230 °C |
| XLogP3 | 6.1 |
| H-bond donors / acceptors | 0 / 6 |
| Topological polar surface area | 133 Ų |
| HS code | 29349900 |
| InChIKey | CFHGBZLNZZVTAY-UHFFFAOYSA-N |
| SMILES | COC1=CC=C(C=C1)P2(=S)SP(=S)(S2)C3=CC=C(C=C3)OC |
| PubChem CID | 87949 |
| Synonyms | 2,4-Bis(4-methoxyphenyl)-2,4-dithioxo-1,3,2,4-dithiadiphosphetane, 2,4-Bis-(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulfide, 4-Methoxyphenylthiophosphoric cyclic di(thioanhydride), 1,3,2,4-Dithiadiphosphetane, 2,4-bis(4-methoxyphenyl)-, 2,4-disulfide, P-Anisyldithiophosphonic anhydride, Lawesson reagent, 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide, Lawessons reagent, Lawesson' reagent, 2,4-Bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulfide, 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide, 2,4-Bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulphide |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Danger
- H261In contact with water releases flammable gas
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H332Harmful if inhaled
Precautionary statements P231 + P232, P261, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P321, P330, P362 + P364, P370 + P378, P402 + P404, P501
Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 25 g | Quoted on request | |
| 100 g | Quoted on request | |
| 5 x 1 kg | Quoted on request | |
| 4 x 25 kg | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
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