Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl [1R-[1alpha[S*(Z)](3beta)-3-(3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate
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Purity: 98.0%
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121-29-9

121-29-9 structure

Name: pyrethrin 2
Chemical Name: pyrethrin II
CAS Number: 121-29-9
Molecular Formula: C₂₂H₂₈O₅
Molecular Weight: 372.455
Catalog: Chemical pesticide Insecticide Pyrethroid insecticide
Create Date: 2018-02-05 08:00:00
Modify Date: 2026-07-01 14:57:58

Name	pyrethrin II
Synonyms	pyretrinii 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl3-(2-methoxycbonylprop-1-enyl)-2,2-dimethylcyclopropanecboxylate ent7 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl[1R-[1α[S(Z)](3β)]]-3-(3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropanecboxylate pyrethrin II (1R,3R)-3-[(1E)-3-Méthoxy-2-méthyl-3-oxo-1-propèn-1-yl]-2,2-diméthylcyclopropanecarboxylate de (1S)-2-méthyl-4-oxo-3-[(2E)-2,4-pentadièn-1-yl]-2-cyclopentén-1-yle Pyrethrin Ⅱ pyrethroloneesterofchrsanthemumdicboxylicacidmonomethylester (1R,3R)-3-[(E)-3-Methoxy-2-methyl-3-oxo-1-propenyl]-2,2-dimethylcyclopropanecboxylic acid (S)-2-methyl-4-oxo-3-[(Z)-2,4-pentadienyl]-2-cyclopenten-1-yl ester 2-Methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl-[1R-[1a [S(Z)], (3b) ]]-3-(3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropancboxylat 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl 3-(2-methoxycbonylprop-1-enyl)-2,2-dimethylcyc yl-,2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-ylester,[1theta-[1a pyrethrinii (+)-pyrethronyl(+)-pyrethrate pyrethrolone,chrysanthemumdicboxylicacidmethylesterester (1S)-2-Methyl-4-oxo-3-[(2E)-2,4-pentadien-1-yl]-2-cyclopenten-1-yl (1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propen-1-yl]-2,2-dimethylcyclopropanecarboxylate (1S)-2-Methyl-4-oxo-3-[(2E)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl (1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl]-2,2-dimethylcyclopropanecarboxylate Pyrethrin II, ade, mixture of pyrethin I (1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl (1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl]-2,2-dimethylcyclopropane-1-carboxylate pyrethrins II Cyclopropanecboxylicacid, 3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propen-1-yl]-2,2-dimethyl-,(1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadien-1-yl-2-cyclopenten-1-yl ester,(1R,3R) (1R,3R)-3-[(E)-2-Methoxycbonyl-1-propenyl]-2,2-dimethylcyclopropanecboxylic acid (S)-2-methyl-4-oxo-3-[(2Z)-2,4-pentadienyl]-2-cyclopenten-1-yl ester yl-,2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-ylester,(1r-(1alpha(s pyrethrolone,chrysanthemumdicboxlicacidmethylesterester 2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-yl3-(3-methoxy-2-methyl-3-o Pyrethrum flowers slag powder (Z)-(S)-2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl pyrethrate (1S)-2-Methyl-4-oxo-3-[(2E)-2,4-pentadien-1-yl]-2-cyclopenten-1-yl-(1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propen-1-yl]-2,2-dimethylcyclopropancarboxylat EINECS 204-462-6 (1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadien-1-yl-2-cyclopenten-1-yl (1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxo-1-propen-1-yl]-2,2-dimethylcyclopropanecarboxylate (1S)-2-Methyl-4-oxo-3-[(2E)-penta-2,4-dien-1-yl]cyclopent-2-en-1-yl-(1R,3R)-3-[(1E)-3-methoxy-2-methyl-3-oxoprop-1-en-1-yl]-2,2-dimethylcyclopropancarboxylat pyrethrineii 3beta(e)]]-lpha[s(z) cyclopropanecboxylicacid,3-(3-methoxy-2-methyl-3-oxo-1-propenyl)-2,2-dimeth chrysanthemumdicboxylicacidmonomethylesterpyrethroloneester cyclopropaneacrylicacid,3-cboxy-alpha,2,2-trimethyl-,1-methylester,ester 3beta(e)))-(z) (Z)-(S)-2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl (E)-(1R,3R)-3-(2-methoxycarbonylprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate PYRETHRIN 2 Cyclopropanecboxylic acid, 3-(1E)-3-methoxy-2-methyl-3-oxo-1-propenyl-2,2-dimethyl-, (1S)-2-methyl-4-oxo-3-(2Z)-2,4-pentadienyl-2-cyclopenten-1-yl ester, (1R,3R) pyrethrin xo-1-propenyl)-2,2-dimethylcyclopropanecboxylate Pyrethrin II 2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl [1R-[1alpha[S(Z)](3beta)-3-(3-methoxy-2-methyl-3-oxoprop-1-enyl)-2,2-dimethylcyclopropanecboxylate with4-hydroxy-3-methyl-2-(2,4-pentadienyl)-2-cyclopenten-1-one Pyrethrin II in Acetonitrile (Z)-(S)-2-methyl-4-oxo-3-(penta-2,4-dienyl)cyclopent-2-enyl (E)-(1R)-trans-3-(2-methoxycarbonylprop-1-enyl)-2,2-dimethylcyclopropanecarboxylate 2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-ylester

Density	1.1±0.1 g/cm3
Boiling Point	473.7±45.0 °C at 760 mmHg
Molecular Formula	C₂₂H₂₈O₅
Molecular Weight	372.455
Flash Point	203.8±28.8 °C
Exact Mass	372.193665
PSA	69.67000
LogP	4.43
Vapour Pressure	0.0±1.2 mmHg at 25°C
Index of Refraction	1.528

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GZ0700000

CHEMICAL NAME :: Cyclopropaneacrylic acid, 3-carboxy-alpha,2,2-trimethyl-, 1-methyl ester, ester with 4- hydroxy-3-methyl-2-(2,4-pentadienyl)-2-cyclopenten-1- one

CAS REGISTRY NUMBER :: 121-29-9

LAST UPDATED :: 199701

DATA ITEMS CITED :: 9

MOLECULAR FORMULA :: C22-H28-O5

MOLECULAR WEIGHT :: 372.50

WISWESSER LINE NOTATION :: L5V BUTJ B2U2U1 C1 DOV- BL3TJ A1 A1 C1UY1&VO1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Human - man

DOSE/DURATION :: 1029 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: 85DCAI "Poisoning; Toxicology, Symptoms, Treatments," 2nd ed., Arena, J.M., Springfield, IL, C.C. Thomas, 1970 Volume(issue)/page/year: 2,73,1970

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 200 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: ARSIM* Agricultural Research Service, USDA Information Memorandum. (Beltsville, MD 20705) Volume(issue)/page/year: 20,17,1966

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1 mg/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Behavioral - tremor Behavioral - convulsions or effect on seizure threshold

REFERENCE :: PCBPBS Pesticide Biochemistry and Physiology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1971- Volume(issue)/page/year: 2,308,1972

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 130 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: ABCHA6 Agricultural and Biological Chemistry. (Maruzen Co. Ltd., POB 5050, Tokyo International, Tokyo 100-31, Japan) V.25- 1961- Volume(issue)/page/year: 37,2681,1973 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-FINLAND:TWA 5 mg/m3;STEL 10 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 5 mg/m3;STEL 10 mg/m3 JAN 1993 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 83467 No. of Facilities: 6 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 17 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 83467 No. of Facilities: 241 (estimated) No. of Industries: 6 No. of Occupations: 8 No. of Employees: 5966 (estimated) No. of Female Employees: 390 (estimated)

Hazard Codes	Xn: Harmful;N: Dangerous for the environment;
Risk Phrases	R20/21/22
Safety Phrases	S13;S60;S61
RIDADR	UN 2902
Packaging Group	III
Hazard Class	6.1(b)
HS Code	29183000

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