Cis-[(1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dienyl]cyclopent-2-en-1-yl] (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate

This substance is a pyrethrin I (CAS 121-21-1), a natural insecticidal compound with molecular formula C21H28O3 and molecular weight 328.4 g/mol. It is a complex organic ester featuring cyclopentene and cyclopropane ring systems with multiple stereocenters. Classified as moderately hazardous with Acute Tox. 4 rating and highly toxic to aquatic life, it requires careful handling and environmental protection measures.

Pyrethrin I is a viscous liquid or semi-solid at room temperature with a pale yellow to amber color and characteristic mild odor. It has limited water solubility but dissolves readily in organic solvents like alcohols, oils, and hydrocarbons. The compound is photosensitive and thermally unstable, decomposing when exposed to light and elevated temperatures, which affects its stability during storage and application.

Pyrethrin I is primarily used as a natural insecticide in agricultural and household pest control products. It serves as an active ingredient in organic farming applications, indoor insect sprays, and professional pest management formulations. The compound is valued for its rapid knockdown effect against flying insects and its biodegradability, making it suitable for environmentally conscious pest control solutions.

Pyrethrin I requires standard personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or use respiratory protection to avoid inhalation. Given its Acute Tox. 4 classification with GHS07 pictogram, avoid ingestion and prolonged skin contact. Wash hands thoroughly after handling and before eating or drinking.

Pyrethrin I must be stored in a cool, dry, dark place away from direct sunlight and heat sources due to its photosensitive nature. Keep containers tightly sealed in original packaging at temperatures below 25°C. Store separately from strong oxidizing agents, acids, and bases. Ensure storage areas have adequate ventilation and are equipped with appropriate spill containment measures to protect the environment.

Pyrethrin I exposure requires immediate action: for skin contact, remove contaminated clothing and wash thoroughly with soap and water. In case of eye contact, flush with clean water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek medical assistance. Always consult safety data sheets for specific first aid measures.

Pyrethrin I disposal must comply with local and European waste regulations as hazardous chemical waste. Due to its aquatic toxicity (Aquatic Acute 1, Chronic 1), prevent release to water systems or soil. Contact licensed waste disposal companies for proper treatment. Empty containers should be triple-rinsed and disposed of according to local regulations. Never discharge into drains, sewers, or natural waterways.

Pyrethrin I is classified under ADR Class 6.1 (Toxic substances), Packing Group III for transportation. It requires appropriate UN specification packaging with proper labeling including GHS07 and GHS09 pictograms and 'Warning' signal word. Transport documents must accompany shipments, and drivers need ADR training. Ensure packages are secured against damage and leakage during transit and comply with quantity limitations for different transport modes.

Pyrethrin I is subject to European REACH regulation requiring registration and safety assessments. Under CLP regulation, it carries specific hazard classifications (Acute Tox. 4, Aquatic Acute/Chronic 1) requiring appropriate labeling. As a pesticide active substance, it may be subject to biocidal product regulations. Users must comply with occupational health regulations and environmental protection requirements, particularly regarding aquatic environment protection.

Pyrethrin I is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides this substance to professional users including pesticide manufacturers, agricultural companies, and research institutions across Europe. As a regulated substance requiring proper handling expertise, OYSI ensures compliance with transportation, documentation, and safety requirements while offering technical support for professional applications.