CAS 1 record

CAS 18721-51-2

CAS 18721-51-2 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 18721-51-2

CAS 18721-51-2PubChem CID 23615267

Nickel(2+) hydrogen citrate

IUPAC name: 2-(carboxymethyl)-2-hydroxybutanedioate;nickel(2+)

Molecular formula: C6H6NiO7
Molecular weight: 248.80 g/mol
Exact mass: 247.946694 Da
Topological polar surface area: 138.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 7
Covalent units: 2
Defined stereocentres: 0

Also known as

EINECS 242-533-3EC 242-533-3RefChem:165688242-533-3

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External database identifiers

EPA DTXSID:DTXSID501029294

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 18721-51-2

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How CAS 18721-51-2 is used on this site

CAS 18721-51-2 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares 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 18721-51-2 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.