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- W4321787712 abstract "Extract AOAC Official Method 953.05Allethrin (Technical) and Pesticide Formulations: Titrimetric Method First Action 1953 Caution: See safety notes on pesticides. Principle Allethrin reacts quant. with ethylenediamine to form chrysanthemum monocarboxylic acid which is determined by titration with standard NaOMe in pyridine. Chrysanthemum monocarboxylic acid, anhydride, and acid chloride interfere quant. and are determined independently. Reagents ... Determination of Chrysanthemum Monocarboxylic Acid Chloride Add 8–10 drops mixed indictor, B(g), to ca 150 mL anhydrous MeOH and add 0.1 N HCl, B(b), dropwise until solution appears reddish brown by transmitted light. Add 0.02 N KOH, B(d), dropwise until appearance of first green. Transfer 25 mL to each of three 125 mL glass-stoppered Erlenmeyers, reserving one flask as reference color for end point. Into each of other flasks, add 1.5–2.5 g sample from weighing pipet, swirling flask while adding sample. Within 5 min, titrate with 0.02 N KOH, B(d), to first green end point, using blank as reference color. Calculate milliequivalent chrysanthemum monocarboxylic acid chloride/g sample:" @default.
- W4321787712 created "2023-02-25" @default.
- W4321787712 date "2023-01-04" @default.
- W4321787712 modified "2023-09-30" @default.
- W4321787712 title "Pesticides Related to Natural Products and their Synergists" @default.
- W4321787712 cites W194206782 @default.
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- W4321787712 doi "https://doi.org/10.1093/9780197610145.003.060" @default.
- W4321787712 hasPublicationYear "2023" @default.
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