C8H16O2
144.21 g/mol
APIDanger
VALPROIC ACID
CAS99-66-1EC202-777-3
Category
API
Compound Class
Organic Acid
Primary Use
Pharmaceutical Raw Material
Valproic acid is an active pharmaceutical ingredient used as an anticonvulsant in the manufacturing of medications. It has been associated with potential developmental toxicity based on expert evaluation.
pharmaceutical raw material for anticonvulsant drug productscompound used in epilepsy research
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 99-66-1
Related Compounds
StrongSame Parent
Valproate semisodium
CAS76584-70-8
pharmaceutical raw material
SimilarStructure SimilarSimilarity 0.80
2-propylhexanoic acid
CAS3274-28-0
Chemical intermediate for synthesis
ApplicationSame Use
Mephobarbital
CAS115-38-8
pharmaceutical raw material
ApplicationSame Use
Paramethadione
CAS115-67-3
pharmaceutical raw material
ApplicationSame Use
Eslicarbazepine acetate
CAS236395-14-5
pharmaceutical raw material
ReferenceSame Category
Imiquimod
CAS99011-02-6
pharmaceutical raw material
ReferenceSame Category
Bis(2-Acetamido-1,3,4-thiadiazol-5-yl) Disulfide
CAS99055-56-8
pharmaceutical raw material
ReferenceSame Category
Glucagon-like peptide II (human)
CAS99120-49-7
pharmaceutical raw material
Safety Reference
Danger
H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H360May damage fertility or the unborn child
H336May cause drowsiness or dizziness
H362May cause harm to breast-fed children
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for VALPROIC ACID (CAS 99-66-1) is 2915.90.
HS code (international, 6-digit)
2915.90
EU CN code (8-digit)
2915 90 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-propylpentanoic acid
InChIKey
NIJJYAXOARWZEE-UHFFFAOYSA-N
SMILES
CCCC(CCC)C(=O)O
Synonyms (113)
- G2M-777
- PEAC
- VPA
- Acide valproique [INN-French]
- Acido valproico [INN-Spanish]
- Acidum valproicum [INN-Latin]
- Valproic Acid; Sodium Caprylate EP Impurity E
- Valproic acid USP
- Valproic acid for system suitability, European Pharmacopoeia (EP)
- Valproic acid, European Pharmacopoeia (EP)
- Valproic acid, United States Pharmacopeia (USP)
- (S)-2-propyl-4-pentanoate
- 2 PP (base)
- 2,2-di-n-propylacetic acid
- 2-Propylpentanoic acid
- 2-Propylvaleric acid
- 2-n-Propyl-n-valeric acid
- 2-propyl-Pentanoate
- 4-Heptanecarboxylic acid
- APO-divalproex
- Acetic acid, dipropyl-
- Acide valproique
- Acido valproico
- Acidum valproicum
- Alti-Valproic
- Apo-valproic
- Avugane
- Baceca
- Convulex
- Convulex (Salt/Mix)
- DOM-divalproex
- DOM-valproic acid E.C.
- Depacon (Salt/Mix)
- Depakene
- Depakene (TN)
- Depakin
- Depakin chrono
- Depakine
- Depakine chrono
- Depakote (TM)
- Deproic
- Di-n-propylacetic acid
- Di-n-propylessigsaeure
- Di-n-propylessigsaure
- Dipropylacetate
- Dipropylacetic acid
- Divalproex (Salt/Mix)
- Dom-Valproic
- Dom-valproate
- Dom-valproic acid
- Epical (TM)
- Epiject I.V.
- Epilim
- Epilim (Salt/Mix)
- Epival er
- Erganyl; Stavzor
- Ergenyl
- Eurekene (Salt/Mix)
- Gen-divalproex
- Kyselina 2-propylvalerova
- Med Valproic
- Mylproin
- Myproic Acid
- Novo-Valproic
- Novo-Valproic - ECC
- Novo-divalproex
- Novo-valproic soft gel cap
- Nu-Valproic
- PHL-valproate
- PHL-valproic acid
- PHL-valproic acid E.C.
- PMS-Divalproex
- PMS-Valproic Acid
- PMS-valproate
- PMS-valproic acid E.C.
- Penta-Valproic
- Propylvaleric acid
- Ratio-Valproic - ECC
- S(-)-4-En-valproate
- S-2-n-Propyl-4-pentenoate
- Sandoz valproic
- Savicol
- Sprinkle
- Stavzor
- VALPROIC ACID
- VALPROIC ACID [MART.]
- VPA +TNFa
- VPA;2-Propylpentanoic Acid
- Valcote
- Valdisoval (Salt/Mix)
- Valeric acid, 2-propyl-
- Valerin
- Valparin (Salt/Mix)
- Valproic
- Valproic acid (GMP)
- Valproic acid (Standard)
- Valproic acid CRS
- Valproic acid RS
- Valproinsaeure
- Vaproic acid
- Vupral
- n-DPA
- n-Dipropylacetic acid
- pentanoic acid, 2-propyl