Pencycuron industry brief: specs, use-cases, and what buyers really ask
Sourced from No. 66 Xiangtai Road, Yuhua District, Shijiazhuang City, Hebei Province, China, Pencycuron sits in that practical sweet spot for seed treatment and soil-borne disease control. I’ve seen buyers return to it for Rhizoctonia management on potatoes and ornamentals—quietly effective, and honestly, less fussy in the warehouse than many newer actives.
What it is (and the real-world picture)
On paper, Pencycuron is a pure white crystalline fungicide (CAS 66063-05-6) with MW 328.84. In practice, buyers sometimes meet it as a reddish liquid—typically a formulated concentrate—so don’t be surprised by that. The technical grade’s hydrophobicity (LogP ≈ 5.39) explains the insolubility in water and the preference for organic solvents.
| Parameter | Typical spec (tech grade) | Notes |
|---|---|---|
| CAS | 66063-05-6 | Identity |
| Appearance | White crystals (tech) | Formulations may appear reddish liquid |
| Density | ≈ 1.22 g/cm³ | Real-world use may vary |
| Melting point | 129–134 °C | QC check |
| Boiling point | ≈ 528.5 °C (760 mmHg) | Calculated |
| Flash point | ≈ 273.4 °C | Safety data |
| Refractive index | n = 1.619 | Formulation dependent |
| Solubility | Soluble in DCM; slightly in toluene; water insoluble | Process/handling note |
| Assay (HPLC) | ≥ 98.0% a.i. | Per FAO/CIPAC method |
Process flow, QC, and shelf life
- Materials: aromatic urea intermediates, chlorobenzyl reagents, cycloalkyl amines, high-purity solvents.
- Methods: controlled urea coupling, benzylation, purification via recrystallization; particle-size tuning for SC/FS.
- Testing standards: HPLC assay and impurity profiling (CIPAC/FAO), GC for residual solvents (OECD), KF water, mp range, IR identity.
- Service life: ≈ 2 years sealed; store cool, dry, ventilated; segregate from food/feed during transport.
- Industries: crop protection (seed treatment, soil drench), ornamental horticulture, turf management.
Application scenarios
Growers use Pencycuron for Rhizoctonia spp. on potatoes (seed tuber treatment), ornamentals, and some nursery crops. Typical rates: seed treatment 50–100 g a.i./100 kg seed; in-field sprays or drenches depend on formulation—always follow local labels, obviously.
Advantages people mention: good seed coverage, low phytotoxicity in labeled crops, and compatible tank-mix behavior with common polymer binders in FS formulations.
Vendor snapshot (buyer’s quick compare)
| Vendor | Location | Purity (a.i.) | Lead time | Certs | Notes |
|---|---|---|---|---|---|
| Hebei supplier (origin) | Shijiazhuang, CN | ≥98.0% | ≈ 10–15 days | ISO 9001/14001 (typ.) | Flexible on FS/SC customizations |
| EU formulator | EU | Formulated | ≈ 3–4 weeks | REACH (where applicable) | Regulatory support strong |
| APAC blender | SEA | SC/FS | ≈ 2–3 weeks | ISO (varies) | Cost-effective, MOQs apply |
Customization and packaging
Common options: Pencycuron tech powder with specified particle size; SC (suspension concentrate) 25–50% a.i.; FS (seed-treatment) 20–35% a.i. Packaging ranges from 25 kg fiber drums (tech) to 1–20 L jerrycans (formulations). SDS and COA supplied; third-party testing (per OECD GLP labs) on request.
Field notes and feedback
Many customers say Pencycuron plays nicely as a base seed treatment, with consistent suppression of Rhizoctonia scurf on potatoes. One northern EU packer reported a 12–18% reduction in tuber blemish scores after switching to an FS built on this a.i.—not a miracle, but real money saved at grading.
Authoritative references
- FAO/WHO JMPR Evaluations: Pencycuron (active substance review). https://www.fao.org
- EU Pesticides Database – Active substances: Pencycuron. https://food.ec.europa.eu/
- PubChem Compound Summary: Pencycuron. https://pubchem.ncbi.nlm.nih.gov/compound/Pencycuron
- CIPAC Handbook: Analytical methods for pesticide technicals and formulations. https://www.cipac.org/
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