Project indicators Pyrethrin mass fraction a/% 1.3~1.7 pH value 4.0~7.0 Pourability/residue after pouring/% ≤3.0 Pourability/residue after washing/% ≤0.5 Emulsion stability (diluted 200 times) None in the graduated cylinder Floating oil (paste), sinking oil and sedimentation. Persistent foaming property (foam volume after 1 minute)/mL ≤25 After low-temperature stability and cold storage, the volume of the educt at the bottom of the centrifuge tube does not exceed 0.3mL. Thermal storage stability: After thermal storage, the mass fraction of pyrethrin shall not be lower than 95% of the mass fraction measured before storage, and the pH value and emulsion stability still meet the requirements of this document. a Pyrethrin is a mixture of 6 insecticidal components, namely pyrethrin I, cyperrin I, jasponin I, pyrethrin II, ciurrin II, and jasponin II.
T/ZNX 025-2023 history
2023T/ZNX 025-2023 1.5% pyrethrum extract water emulsion