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CAS 99-66-1

CAS 99-66-1 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 99-66-1
CAS 99-66-1PubChem CID 3121

Valproic Acid

Valproic acid is a branched-chain saturated fatty acid that comprises of a propyl substituent on a pentanoic acid stem. It has a role as a psychotropic drug, an antimanic drug, an anticonvulsant, a teratogenic agent, a GABA agent, an EC 3.5.1.98 (histone deacetylase) inhibitor and a neuroprotective agent. It is a branched-chain fatty acid and a branched-chain saturated fatty acid. It is functionally related to a valeric acid. It is a conjugate acid of a valproate. — ChEBI

IUPAC name
2-propylpentanoic acid
Molecular formula
C8H16O2
Molecular weight
144.21 g/mol
Exact mass
144.115029749 Da
XLogP3
2.8
Topological polar surface area
37.3 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

2-Propylvaleric acidDipropylacetic acidDepakeneDepakineMylproinDi-n-propylacetic acidPropylvaleric acidn-Dipropylacetic acid
16 more reported names
4-Heptanecarboxylic acidMyproic AcidConvulexn-DPAAcido valproicoAcide valproiqueDi-n-propylessigsaureStavzorKyselina 2-propylvalerovaAcidum valproicum2-n-Propyl-n-valeric acidAcetic acid, dipropyl-Epilim2-PROPYL-PENTANOIC ACIDValeric acid, 2-propyl-pentanoic acid, 2-propyl
Open full PubChem recordPubChem annotations3D structure image
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 99-66-1

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How CAS 99-66-1 is used on this site

CAS 99-66-1 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 99-66-1 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.