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CAS 4070-43-3

CAS 4070-43-3 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 4070-43-3

CAS 4070-43-3PubChem CID 10953820

4-Ethyl hydrogen L-aspartate

IUPAC name: (2S)-2-amino-4-ethoxy-4-oxobutanoic acid

Molecular formula: C6H11NO4
Molecular weight: 161.16 g/mol
Exact mass: 161.06880783 Da
XLogP3: -2.1
Topological polar surface area: 89.6 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 1

Also known as

4-ethyl aspartateL-Aspartic acid, 4-ethyl esterO6NM79A845Aspartic acid, 4-ethyl ester, L-(S)-2-Amino-4-ethoxy-4-oxobutanoic acidAspartic acid, 4-ethyl ester4-Ethyl-L-aspartateUNII-O6NM79A845

3 more reported names

KALSWOYBXAHEKF-BYPYZUCNSA-NEINECS 223-779-0EN300-7706992

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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 4070-43-3

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How CAS 4070-43-3 is used on this site

CAS 4070-43-3 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 4070-43-3 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.