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CAS 66893-81-0

CAS 66893-81-0 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 66893-81-0
CAS 66893-81-0PubChem CID 135532295

alpha-(4-Pyridyl-1-oxide)-N-tert-butylnitrone

IUPAC name
N-tert-butyl-1-(1-oxidopyridin-1-ium-4-yl)methanimine oxide
Molecular formula
C10H14N2O2
Molecular weight
194.23 g/mol
Exact mass
194.105527694 Da
XLogP3
-0.2
Topological polar surface area
54.2 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

POBN4-POBNPyridyloxide tert-butylnitrone2140SM8Q5ON-TERT-BUTYL-'A-(4-PYRIDL)NITRONE N'-OXIDE4-PyOBN4-pyridyl-1-oxide-T-butylnitroneRefChem:111041
16 more reported names
266-512-3N-tert-Butyl-alpha-(4-pyridyl-1-oxide)nitronealpha-(4-Pyridyl N-oxide)-N-tert-butylnitronetert-butyl-[(1-oxidanidylpyridin-4-ylidene)methyl]-oxidanylidene-azaniumtert-butyl-[(1-oxidopyridin-4-ylidene)methyl]-oxoazaniumPyridyloxide t-butylnitrone(Z)-2-methyl-N-((1-oxidopyridin-4-yl)methylene)propan-2-amine oxideAS-55806DA-66790HY-114713alpha-(4-pyridyl-N-oxide)-N-t-butylnitroneCS-0064148C-(4-PYRIDINYL-N-OXIDE)-N-TERT-BUTYLNITRONEN-tert-Butyl-|A-(4-pyridyl-1-oxide)nitrone(POBN).ALPHA.-(4-PYRIDYL-1-OXIDE)-N-T-BUTYLNITRONE.ALPHA.-(4-PYRIDYL-1-OXIDE)-N-TERT-BUTYLNITRONE
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 66893-81-0

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How CAS 66893-81-0 is used on this site

CAS 66893-81-0 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 66893-81-0 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.