Safety Reference
Danger
H261In contact with water releases flammable gas
H302Harmful if swallowed
H312Harmful in contact with skin
H332
Sourcing Lawesson's reagent?
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2-Methylthiophene-3-carboxylic acid
research compound
Sourcing Lawesson's reagent?
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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.
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.
The international HS code for Lawesson's reagent (CAS 19172-47-5) is 2931.49.
2931.49
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.
2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2lambda5,4lambda5-dithiadiphosphetane
CFHGBZLNZZVTAY-UHFFFAOYSA-N
COC1=CC=C(C=C1)P2(=S)SP(=S)(S2)C3=CC=C(C=C3)OC