Pyrethrin I

除虫菊素I

Also known as: Pyrethrin 1, Pyrethrin I (standard), (1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate, 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl [1R-[1α[S*(Z)],3β]]-chrysanthemate, Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, (1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadienyl-2-cyclopenten-1-yl ester, (1R,3R)-, PYRETHRIN 1, pyrethrin I, pyrethrins I

Pyrethrin I (CAS 121-21-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H28O3 and a molecular weight of 328.445 g/mol. It is also known as Pyrethrin 1, Pyrethrin I (standard) and (1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate. Key properties include a boiling point of 424.3±45.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 182.2±28.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

121-21-1

Jingsj CID

J-13683-1

Molecular Formula

C₂₁H₂₈O₃

Chinese Name

除虫菊素I

Molecular Weight

328.445 g/mol

Category

Organic Compounds

Last updated

8/21/2026