Pale Refined Extract (PRE) is a concentrated liquid derived from dried pyrethrum flowers (Chrysanthemum cinerariafolium). With 50% w/w pyrethrins, it is one of the most potent naturally derived insecticidal active ingredients available and is used by formulators worldwide across household, agricultural, animal health, and public health applications.
Key advantages:
- Rapid knockdown — attacks insect nervous systems on contact and flushes pests from harbourage sites.
- Photo-degradable — breaks down quickly under UV light, leaving no persistent residues and minimising pre-harvest intervals.
- Broad-spectrum — effective across flying and crawling pests; suitable for PT 18 and PT 19 biocidal product types.
- Synergist compatible — commonly combined with PBO to enhance efficacy at lower use rates.
- OMRI Listed — approved source material for certified organic formulations.
Typical formulation uses:
- Household aerosols, electric vaporisers, and surface sprays
- Agricultural and horticultural crop protection
- Ectoparasite control for livestock and companion animals
- Food-handling area treatments
- Public health / vector control (mosquito fogging, ULV, residual sprays)
- Certified organic product development
| Contains: | 50% pyrethrins (pyrethrins I & II, jasmolines I & II, cinerines I & II) — suitable for PT 18 and PT 19 biocidal and plant protection formulations. |
| Packaging: | 25 kg UN-certified and IATA-approved metal drums. |
| Shelf life: | Minimum 2 years from manufacture date, stored cool and dry. |
Full technical data from Kentegra Quality Assurance Technical Data Sheet KBEPZ/QA/TDS-1 and MSDS Revision 01.
Specification Details
| Trade name | Kentegra PRE 50% |
| Active Ingredient | Chrysanthemum cinerariaefolium extract |
| Total Pyrethrins | 50 ± 2% w/w (by HPLC Method) |
| Diluent | Hydrocarbons, C10-C13, isoalkanes |
| Stabiliser | Butylated hydroxytoluene (BHT), 5 ± 1% w/w (by HPLC Method) |
| Appearance | Yellowish amber colour |
| Odour Characteristic | vegetable |
| Water Content | ≤ 1.1% max (by Karl Fischer Method) |
| Flash Point | ≥ 60°C (Abel Closed Cup Method, ASTM D3828) |
| Density | 0.90–0.96 g/ml at 20°C |
| Boiling Range | 136–198°C |
| Solubility | Insoluble in water; soluble in organic solvents |
| Viscosity | 7.05 mm²/s at 40°C |
H302 · H304 · H317 · H332 · H410 — Very toxic to aquatic life with long-lasting effects.
Rapidly degraded by sunlight (DT₅₀ 11.8 h at 25 °C). Prevent release to waterways.
Enter your email address and we'll send you the Technical Data Sheet and Material Safety Data Sheet for Kentegra PRE 50%.
Your details are used only to process this request and provide product updates. We do not share your data with third parties.
