N-Nitrosodiethylamine

Not to be confused with N-Nitrosodimethylamine.

N-Nitrosodiethylamine (NDEA) is an organic compound with the formula Et₂NNO (Et = C₂H₅). A member of the nitrosamines, it is a light-sensitive, volatile, clear yellow oil that is soluble in water, lipids, and other organic solvents. It has an amine or aromatic odor. It is used as gasoline and lubricant additive, antioxidant, and stabilizer for industry materials. When heated to decomposition, N-nitrosodiethylamine emits toxic fumes of nitrogen oxides. N-Nitrosodiethylamine affects DNA integrity, probably by alkylation, and is used in experimental research to induce liver tumorigenesis.^[2] It is carcinogenic and mutagenic.^[3] NDEA has also been found to perturb amino acid biosynthesis including arginine, as well as DNA damage repair and mitochondrial genome maintenance in yeast.^[4]

N-Nitrosodiethylamine

Names
Preferred IUPAC name Diethylnitrous amide
Other names N-Ethyl-N-nitrosoethanamine Diethylnitrosamine DENA NDEA
Identifiers
CAS Number	55-18-5 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:34873
ChemSpider	5708
ECHA InfoCard	100.000.206
EC Number	214-237-4
KEGG	C14422
MeSH	D004052
PubChem CID	5921
UNII	3IQ78TTX1A Y
CompTox Dashboard (EPA)	DTXSID2021028
InChI InChI=1S/C4H10N2O/c1-3-6(4-2)5-7/h3-4H2,1-2H3 Key: WBNQDOYYEUMPFS-UHFFFAOYSA-N
SMILES CCN(CC)N=O
Properties
Chemical formula	C4H10N2O
Molar mass	102.137 g·mol−1
Appearance	Yellow liquid[1]
Density	0.95 g/mL[1]
Boiling point	177 °C (351 °F; 450 K)[1]
Magnetic susceptibility (χ)	-59.3·10−6 cm3/mol
Related compounds
Related compounds	Diethylamine, N-Nitrosodimethylamine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

It is found in tobacco smoke.^[5][6]

It is classified as a Group 2A carcinogen (probable human carcinogen) by the World Health Organization.^[7]

NDEA involvement in recalls

In the year 2019, NDEA was found as an impurity in valsartan and other angiotensin II receptor blockers (ARBs) used to treat high blood pressure and heart failure. The U.S. Food and Drug Administration has confirmed levels of NDEA and/or NDMA exceeding the interim acceptable intake limits, and the affected medicines were recalled.^[8]

References

1. "N-Nitrosodiethylamine". Sigma-Aldrich.
2. "N-Nitrosodiethylamine". PubChem. National Center for Biotechnology Information. May 8, 2021. Retrieved May 12, 2021.
3. Verna, L; Whysner, J; Williams, G. M. (1996). "N-nitrosodiethylamine mechanistic data and risk assessment: Bioactivation, DNA-adduct formation, mutagenicity, and tumor initiation". Pharmacology & Therapeutics. 71 (1–2): 57–81. doi:10.1016/0163-7258(96)00062-9. PMID 8910949.
4. Ogbede, J.U., Giaever, G. & Nislow, C. A genome-wide portrait of pervasive drug contaminants. Sci Rep 11, 12487 (2021). https://doi.org/10.1038/s41598-021-91792-1
5. Tricker, A. R.; Ditrich, C; Preussmann, R (1991). "N-nitroso compounds in cigarette tobacco and their occurrence in mainstream tobacco smoke". Carcinogenesis. 12 (2): 257–61. doi:10.1093/carcin/12.2.257. PMID 1995191.
6. Talhout, Reinskje; Schulz, Thomas; Florek, Ewa; Van Benthem, Jan; Wester, Piet; Opperhuizen, Antoon (2011). "Hazardous Compounds in Tobacco Smoke". International Journal of Environmental Research and Public Health. 8 (12): 613–628. doi:10.3390/ijerph8020613. ISSN 1660-4601. PMC 3084482. PMID 21556207.
7. "List of Classifications, Volumes 1-115". IARC Monographs on the Evaluation of Risk to Humans. International Agency for Research on Cancer. February 22, 2016. Archived from the original on June 10, 2017. Retrieved July 26, 2016.
8. "FDA Updates and Press Announcements on Angiotensin II Receptor Blocker (ARB) Recalls (Valsartan, Losartan, and Irbesartan)". Drug Safety and Availability. U.S. Food and Drug Administration. November 7, 2019. Retrieved May 12, 2021.