C10H16
136.23 g/mol
Research ReagentWarning
1,2,3,4,5-Pentamethylcyclopentadiene
CAS4045-44-7EC223-743-4
Category
Research Reagent
Compound Class
Other
Primary Use
Research Compound
1,2,3,4,5-Pentamethylcyclopentadiene is a cyclic diene that appears as a colorless liquid. It is primarily used as a precursor in the synthesis of organometallic ligands.
precursor for organometallic ligand synthesisresearch reagent for coordination chemistry
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.
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Referencesame scaffold
1,2,3,4-Tetramethyl-1,3-cyclopentadiene
CAS4249-10-9
precursor for cyclopentadienyl ligands
Referencesame scaffold
Cyclopentadiene
CAS542-92-7
Diene in Diels-Alder reactions
Referencesame scaffold
Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium(II)
CAS92390-26-6
pharmaceutical intermediate
Safety Reference
Warning
H226Flammable liquid and vapour
Customs Tariff Classification
The international HS code for 1,2,3,4,5-Pentamethylcyclopentadiene (CAS 4045-44-7) is 2902.19.
HS code (international, 6-digit)
2902.19
EU CN code (8-digit)
2902 19 00
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
1,2,3,4,5-pentamethylcyclopenta-1,3-diene
InChIKey
WQIQNKQYEUMPBM-UHFFFAOYSA-N
SMILES
CC1C(=C(C(=C1C)C)C)C
Synonyms (7)
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