DEET

N,N-Diethyl-meta-toluamide, also called diethyltoluamide or DEET (/diːt/, from DET, the initials of di- + ethyl + toluamide), is the oldest, most effective and most common active ingredient in commercial insect repellents. It is a slightly yellow oil intended to be applied to the skin or to clothing and provides protection against mosquitoes, flies, ticks, fleas, chiggers, leeches, and many other biting insects.

For the former Australian government department known as DEET, see Department of Employment, Education and Training.
Not to be confused with DDT.
DEET
Names
Preferred IUPAC name
N,N-Diethyl-3-methylbenzamide
Other names
N,N-Diethyl-m-toluamide
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.004.682
KEGG
PubChem CID
UNII
  • InChI=1S/C12H17NO/c1-4-13(5-2)12(14)11-8-6-7-10(3)9-11/h6-9H,4-5H2,1-3H3 Y
    Key: MMOXZBCLCQITDF-UHFFFAOYSA-N Y
  • InChI=1S/C12H17NO/c1-4-13(5-2)12(14)11-8-6-7-10(3)9-11/h6-9H,4-5H2,1-3H3
    Key: MMOXZBCLCQITDF-UHFFFAOYAE
SMILES
  • O=C(c1cc(ccc1)C)N(CC)CC
Properties
C12H17NO
Molar mass 191.27 g/mol
Density 0.998 g/mL
Melting point −33 °C (−27 °F; 240 K)
Boiling point 288 to 292 °C (550 to 558 °F; 561 to 565 K)
Pharmacology
P03BX02 (WHO) QP53GX01 (WHO)
Hazards
GHS labelling:
Danger
H302, H315, H319, H402
NFPA 704 (fire diamond)
2
1
0
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Unlike Icaridin, DEET emits an odor that many find unpleasant, leaves skin greasy, dissolves plastics and synthetic fabrics and interacts negatively with sunscreen.

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