Common Name
Propargite


IUPAC
2-(4-tert-butylphenoxy)cyclohexyl prop-2-ynyl sulfite
CAS
2-[4-(1,1-dimethylethyl)phenoxy]cyclohexyl 2-propynyl sulfite
CAS No.
2312-35-8
Molecular Formula
C₁₉H₂₆O₄S
Molecular Structure

General Product Information
Category
Acaricides / Miticides > Sulfite ester acaricides
Activity
Acaricide/Miticide
Premix
Bifenthrin+propargite
Fenpropathrin+propargite
Propargite+fenvalerate
Wettable powder, emulsifiable concentrate, emulsion in water. 
Premix Parters: azoxystrobin; carbendazim; chlorothalonil; chlorothalonil cyproconazole; chlorothalonil fludioxonil; cyproconazole; cyprodinil; difenoconazole; fenpropidin; fenpropidin tebuconazole; fenpropimorph; flutolanil; folpet; isoprothiolane; prochloraz; pyroquilon; tebuconazole; trifloxystrobin;
Physical & Safety Data
Physical Properties
Molecular weight:350.5; Physical form:Dark reddish-brown, viscous liquid (tech.). Density:1.1130 (20 °C); Composition:Tech. grade is >85% m/m pure. Flash point:71.4 °C (Pensky-Martens closed cup); Vapour pressure:0.006 mPa (25 °C); Henry constant:3.33 ×10-6 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 3.73; pKa:>12; Solubility:In water 632 mg/l (25 °C). Miscible with most organic solvents, such as acetone, benzene, ethanol, hexane, heptane, and methanol.; Stability: DT50 80 d (pH 7); decomposed by strong acids and alkalis (pH >10). No degradation in packaging at 20 °C for 1 y and 50% r.h. About 1% decomposition after 14 d at 55 °C in water-;
Toxicology
Oral:Acute oral LD₅₀ for rats 2800, rabbits 311 mg/ kg. Percutaneous:Acute percutaneous LD₅₀ for rabbits 4000 mg/kg. Severe eye and skin irritant to rabbits. Not a skin sensitiser to guinea pigs. Inhalation: LC₅₀ (4 h) for rats 0.89 mg/l. Phytotoxicity:Phytotoxic to pears, strawberries, roses, and cotton under 10 inches in height. Citrus fruit and beans may also show some injury. ADI:0.015 mg/ kg b.w.
Environmental Profile
Ecotoxicology:
 Bees: LD₅₀ (48 h, contact) 15µg/bee.Birds:Acute oral LD₅₀ for mallard ducks >4640 mg/kg. Dietary LC₅₀ (5 d) for mallard ducks >4640, bobwhite quail 3401 mg/ kg diet.Daphnia: LC₅₀ (48 h) 0.092 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 0.118, bluegill sunfish 0.168, catfish 0.04, sheepshead minnow 0.06 mg/l.Other aquatic spp.: LC₅₀ (96 h) for grass shrimp 0.101, Quahog clam embryo larvae 0.110 mg/l.
 
Environmental fate: 
Animals:In mammals, propargite is hydrolysed at the sulfite ester linkage to 1-[4-(1,1-dimethylethyl)phenoxy]-2-cyclohexanol and subsequent hydroxylation of the tert-butyl side-chain. Additional metabolites are formed by further oxidation or sulfation ofSoil: DT₅₀ in most soils 7-14 w. K_oc 23 000-90 000, relatively immobile in soil.Plant:Although propargite is considered a non-systemic pesticide, a small portion of the applied dose penetrates the outside layer of the foliage and undergoes the same metabolism as is observed in animals. WATER SOLUBILITY: 0.215 mg/l at 25° C
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)