C14H14O2P2S4
404.5 g/mol
Research ReagentDanger
Lawesson's reagent
CAS19172-47-5EC242-855-4
Category
Research Reagent
Compound Class
Other
Primary Use
Research Compound
Lawesson's reagent is a organophosphorus compound containing a four-membered dithiadiphosphetane ring with two methoxyphenyl substituents and two sulfur atoms bonded to phosphorus. It is primarily used as a thionating agent to convert carbonyl groups into thiocarbonyl groups in organic synthesis.
Thionating agent for converting carbonyls to thiocarbonyls
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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PUBCHEM_25080835
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research compound
Safety Reference
Danger
H261In contact with water releases flammable gas
H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled
Customs Tariff Classification
The international HS code for Lawesson's reagent (CAS 19172-47-5) is 2931.49.
HS code (international, 6-digit)
2931.49
EU CN code (8-digit)
2931 49 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2lambda5,4lambda5-dithiadiphosphetane
InChIKey
CFHGBZLNZZVTAY-UHFFFAOYSA-N
SMILES
COC1=CC=C(C=C1)P2(=S)SP(=S)(S2)C3=CC=C(C=C3)OC
Synonyms (32)
- Lawesson reagent
- Lawesson's reagent
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