Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide

Product	Atrazine 50% + Mesotrione 5% SC (≈ 500 g/L + 50 g/L)
Actives / HRAC	Atrazine — HRAC 5 (PSII); Mesotrione — HRAC 27 (HPPD)
Formulation / Appearance	Suspension Concentrate; uniform, low-odor aqueous suspension
Quality Window	pH / viscosity / suspensibility / fineness within release ranges
Stability / Shelf Life	Cold/heat storage: Pass (validated protocol); shelf life per label under proper storage
Documentation	COA, SDS, TDS, label elements (standard); registration dossier on request
OEM & Packaging	Custom packs (100 mL–1 L bottles; 5–20 L cans), HDPE/PET, multilingual artwork
Traceability & Security	Batch IDs, QR traceability; optional anti-counterfeit (hologram/serialization)
Logistics Kit	Drop-tested cartons, pallet map (20GP/40HQ), packing list + SDS routing, shipment photo pack
QA & Change Control	In-process checks; retention samples per lot; documented change-control for RM/pack
Compliance	For licensed buyers; follow registered label & local regulations (Atrazine may have geographic restrictions)

Atrazine + Mesotrione SC for Corn Weed Programs

A program-ready corn herbicide engineered for annual broadleaf control with additional activity on select grasses. By combining PSII inhibition (HRAC 5) with HPPD inhibition (HRAC 27) in a single suspension concentrate, this formulation excels in post-emergence use and, where permitted by the local label, can cover pre-emergence and early post-emergence windows. It targets high-pressure fields—think frequent rainfall, staggered flushes, and mixed weed communities—delivering a versatile “base + booster” block for integrated programs. Core broadleaf fit includes Amaranthus, Chenopodium, and Polygonum groups; grass fit is partial (e.g., barnyardgrass, crabgrass, foxtails), with program value coming from the dual-MOA complementarity.

Corn Broadleaf Control with Select Grass Fit

• Wider spectrum via dual MOA: PSII + HPPD complementarity with recognized synergy improves depth on tough broadleaves and stabilizes outcomes in variable field conditions.
• Program-friendly architecture: Slots cleanly into pre-em/early post/post-em sequences alongside cultural tactics (tillage, cover crops, rotation) without overcomplicating operations.
• Operational stability: SC platform for low settling and easy re-dispersion; multilingual labeling and traceability streamline approvals and outbound logistics.
• Resistance stewardship baked in: Clear fit/boundary statements and rotation principles help reduce selection pressure from single-MOA dependence.

Safety, Label & Regulation

Supply is restricted to licensed buyers. All crop/sites, intervals, and restrictions must follow the registered product label in your market. Atrazine is regulated more stringently in some countries/states (e.g., buffers or sensitive-area constraints). Complete regulatory checks and label alignment before ordering. This page does not provide field-operational directions (no rates, mixes, or stepwise instructions). Always follow the registered label and local regulations.

HRAC 5+27 Corn Herbicide Fact Sheet

• Active ingredients & groups: Atrazine (HRAC 5, PSII inhibitor) + Mesotrione (HRAC 27, HPPD inhibitor)
• Formulation & content: 50% + 5% SC (industry shorthand equivalent to 500 g/L + 50 g/L)
• Use positioning: Post-emergence anchor; may cover pre-em and early post windows where labeled
• Target profile: Annual broadleaf weeds as primary fit; partial activity on select grasses
• Documentation & compliance: COA / SDS / TDS / label elements; registration support available
• OEM readiness: Custom pack sizes and materials, multilingual artwork, batch/QR traceability, pallet & container plans

Active Ingredients & HRAC Mechanisms — Atrazine + Mesotrione (HRAC 5 + 27)

Atrazine | HRAC 5 (PSII Inhibitor) — Baseline Suppression in Corn Programs

Atrazine inhibits photosystem II (PSII) electron transport, rapidly disrupting photosynthetic energy flow and driving necrosis in susceptible weeds. Within this co-formulation it provides foundational control of annual broadleaves and adjacent coverage on select grasses, stabilizing outcomes in mixed-pressure fields. Selectivity in corn is driven by differential metabolism. Boundary: PSII alone is insufficient against some resistant Amaranthus biotypes or overgrown escapes—the product’s intent is dual-MOA performance, not single-MOA dependence.

Mesotrione | HRAC 27 (HPPD Inhibitor) — Bleaching Signature, Depth on Tough Broadleaves

Mesotrione inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), interrupting carotenoid biosynthesis and exposing chlorophyll to photo-oxidation—seen as characteristic whitening/bleaching. It delivers high activity on difficult broadleaves (e.g., Amaranthus, Chenopodium, Polygonum) while maintaining good selectivity in corn via rapid metabolic breakdown. Program value: In humid, rain-prone, staggered-flush conditions, the HPPD path applies complementary pressure to PSII, improving reliability in dynamic weed communities.

Dual-MOA Complementarity & Synergy — PSII + HPPD for Broader, More Durable Control

Targeting energy supply (PSII) and antioxidant protection (HPPD) creates a two-hit cascade: PSII deprivation collapses electron transport, while HPPD inhibition removes carotenoid shielding. The result is recognized synergy/additivity on tough broadleaves and select grasses, translating to deeper knockdown, fewer revisits, and more predictable program costs (always within local label scope).

Resistance Stewardship — Rotation Rules for HRAC 5 + 27

• MOA diversity by design: Build seasonal or phase-based blocks with non-5/27 partners (per local registrations) to diversify selection pressure.
• Limit sequential exposure: Adhere to label limits on consecutive applications; prefer block rotations over repeated single-MOA use.
• Integrate IPM: Align chemistry with tillage, cover crops, rotation, row-spacing/airflow, and sanitation to reduce seedbank load and rescue pressure.

This section describes mechanism and positioning only—no field rates, mixes, or stepwise directions. All use conditions must follow the registered product label and applicable local regulations; note that Atrazine may be subject to additional restrictions in certain countries/states.

Crop & Weed Fit — Corn Broadleaf & Select Grass Profile

Corn Selectivity & Safety Window

Engineered for field corn selectivity, the formulation is positioned for post-emergence as the primary use case, with pre-emergence and early post-emergence coverage where permitted by the local label. Crop safety is achieved through differential metabolism in corn. Position the product within labeled growth stages only; do not extrapolate beyond approved crop/site scope.

Broadleaf Spectrum — Primary Fit (Amaranthus, Chenopodium, Polygonum)

Delivers core control on problem broadleaves including Amaranthus spp., Chenopodium spp., and Polygonum spp., supporting cleaner rows and lower complaint rates under high-pressure, rain-disrupted programs. The dual-MOA stack (PSII + HPPD) improves depth on mixed-age cohorts and helps reduce re-treatment frequency within label frameworks.

Grass Spectrum — Partial Fit (Barnyardgrass, Crabgrass, Foxtails)

Provides adjacent coverage on select annual grasses (e.g., barnyardgrass, crabgrass, foxtails). For grass-dominant fields or advanced growth stages, design block rotations with non-5/27 partners as allowed by registrations. This preserves broadleaf performance while avoiding single-path dependency on grasses.

Program Windows — Pre-em | Early-Post | Post-em (Label-Dependent)

• Pre-emergence (where labeled): Utilize for early flush suppression in fields with frequent rainfall or staggered emergence; pair with cultural practices (tillage, cover, rotation) to lower seedbank pressure.
• Early post-emergence: Target young, actively growing cohorts to maximize dual-MOA efficiency; integrate scouting to validate spectrum fit.
• Post-emergence (primary): Anchor block for broadleaf control with complementary activity on select grasses; rotate with non-5/27 MOAs per stewardship policy.

Not a universal solution for grass-dominant infestations or unlabeled crops/sites. Do not substitute for dedicated grass control where the species mix or stage exceeds the product’s partial fit. All use conditions, intervals, and restrictions are governed by the registered product label and local regulations (note: Atrazine may carry additional geographic restrictions).

Formulation & Quality Window — 50% + 5% Suspension Concentrate (SC)

SC Platform Rationale

Built as a low-settling, easy-to-redisperse SC to support consistent field preparation and stable supply quality. The formulation architecture prioritizes: (1) particle-size governance for uniform dispersion, (2) shear-resilient rheology to minimize hard-settle during storage and transit, and (3) a low-odor profile suitable for large-scale operations and compliance audits.

Process & Consistency Controls (Principle-Level)

• Technical material qualification: Incoming atrazine (HRAC 5) and mesotrione (HRAC 27) verified against identity/purity windows before batching.
• Dispersion & homogenization: Controlled wet-milling and stabilization to achieve target PSD (D50/D90 range-based) without disclosing proprietary ratios.
• In-process checks: Appearance, pH, viscosity, and suspensibility monitored at critical control points to ensure batch-to-batch reproducibility.
• Storage robustness: Cold/heat storage verification conducted under validated protocols; results recorded in the batch dossier prior to release.
• Traceability: COA per lot, with retention samples archived for investigative and regulatory needs; all changes subject to documented change control.

Quality Window (Range-Based, Non-Operational)

• Appearance: Uniform, off-white to light-colored aqueous suspension; no caking on gentle agitation.
• pH (range): Maintained within validated release limits appropriate for SC stability.
• Viscosity / Rheology: Tuned for pumpability and rapid re-suspension after storage.
• Suspensibility: Meets internal release criteria to limit nozzle settlement risk.
• Screening / Fineness: Passes internal sieve benchmarks for SC smoothness and handling.
• Foam tendency: Controlled to support efficient tank preparation (label governs all operational conditions).
• Stability: Cold/heat storage: Pass (per validated protocol); shelf life within labeled range when stored sealed, cool, dry, and ventilated.

Technical Profile Snapshot (For Datasheets & COA Indexing)

Field	Principle-Level Spec
Actives / HRAC	Atrazine (5) + Mesotrione (27)
Formulation	50% + 5% SC (industry shorthand: 500 g/L + 50 g/L)
Appearance	Uniform, low-odor aqueous suspension
pH	Within validated release window
Viscosity	Pumpable; supports quick re-suspension
Suspensibility	Meets internal release criteria
Fineness / Screening	Pass (range-based benchmark)
Cold/Heat Storage	Pass (validated protocol)
Shelf Life	Within labeled range (proper storage)
Documentation	COA, SDS, TDS, label elements (on order)

This section is non-operational by design. No field rates, mix instructions, or stepwise procedures are provided here. Always follow the registered label and local regulations.

Program Fit & Resistance Management — Post-em Anchor with Label-Dependent Pre/Early-Post Coverage

Program Architecture — How It Slots into Corn Weed Control

Position the formulation as a post-emergence anchor for annual broadleaves with adjacent coverage on select grasses. Where the local label permits, extend coverage into pre-emergence and early post-emergence blocks to stabilize results in rain-disrupted or staggered-flush scenarios. Use scouting and species mix assessments to confirm spectrum fit and to decide when to escalate with non-5/27 partners.

Rotation Strategy — HRAC Diversity by Design

• Alternate MOAs: Build seasonal or stage-based rotations with non-5/27 partners (per local registrations) to diversify selection pressure and avoid single-path dependence.
• Limit sequential exposure: Respect label limits on consecutive applications; favor block rotations (Pre → Early-Post → Post) over repeated single-MOA cycles.
• Protect corn selectivity: Keep applications strictly within labeled crop growth stages and site scope to preserve crop safety margins.

Integration with IPM — Lower the Seedbank, Raise Program Stability

• Cultural/Mechanical stack: Combine with tillage, cover crops, crop rotation, residue/row-space management, and sanitation to reduce incoming and latent cohorts.
• Operational hygiene: Maintain clean field edges, manage volunteer hosts, and standardize intake checks after weather events to prevent re-introductions.
• Data discipline: Track species composition, growth stages, and complaint/revisit metrics; adjust block design accordingly in the next pass.

Boundary Conditions — Where Not to Over-Position

This is not a universal answer for grass-dominant or advanced-stage infestations; where grasses drive pressure beyond the product’s partial fit, prioritize dedicated grass partners under approved labels. Do not extrapolate to unlabeled crops, sites, or intervals.

Program guidance here is principle-level only—no field rates, mixes, or stepwise instructions are provided. All use conditions must follow the registered product label and applicable local regulations; Atrazine may carry additional geographic restrictions.

Safety & Compliance — GHS Semantics, Storage Discipline, Regulatory Alignment

Label-Aligned Safety Posture (GHS & PPE Semantics)

Communicate hazard and precautionary statements, signal words, and pictograms per destination-market rules. Ensure label elements and SDS are synchronized (language, phrasing, and contact details). Worker protection is label-directed: site-appropriate eye/skin protection during handling and container opening, with training on first-aid statements and restricted-entry policies as applicable.

Storage & Transport Readiness

Store sealed in original containers under cool, dry, well-ventilated conditions away from food/feed and incompatible materials; prevent freezing/overheating per label. Segregate from oxidizers and acids; maintain spill kits at designated points. In transit, attach SDS routing sheets, packing lists, emergency contact details, and pallet maps as required by lane regulations. Photo documentation (filling, coding, cartoning, palletization) supports intake QA and chain-of-custody.

Regulatory Considerations — Atrazine Geography & Label Scope

Supply is restricted to licensed buyers operating under local regulations. Atrazine may carry additional restrictions (e.g., buffer zones, sensitive-area constraints, application windows) in certain countries/states; complete a pre-order regulatory check and align label elements before commercialization. Do not position or use outside the registered crop/site scope; observe all label-imposed intervals and limitations.

Stewardship Principle

Treat risk as Hazard × Exposure. Reduce exposure through engineering controls (enclosures, ventilation), administrative controls (SOPs, training, signage), and label-defined PPE. Integrate with IPM tactics to minimize total chemical load and resistance selection pressure over time.

This section is non-operational by design. It provides no field rates, mixes, or stepwise procedures. All handling and use must follow the registered product label and applicable laws.

Packaging & OEM — Multilingual Artwork, Traceability, Route-Ready Pallets

Pack Architecture & Materials

Offer retail/professional packs (e.g., 100 mL–1 L bottles) and program/bulk options (5–20 L cans), with HDPE/PET containers and tamper-evident closures. Labels support EN/ES/FR/AR/RU and additional languages on request. Outer cartons are drop-tested; pallet patterns are tuned to lane constraints (20GP/40HQ), with corner guards and wrap standards for long-haul stability.

Labeling & Anti-Counterfeit

Standardize batch IDs, QR traceability, and optional anti-counterfeit features (holograms, serialized codes). Align hazard/precautionary statements and pictograms with destination regulations and the SDS; keep emergency contacts and manufacturer info consistent across pack and documentation.

OEM / Private-Label Workflow

• Scope & Compliance: Confirm target markets, label languages, crop/site scope, and regulatory mapping.
• Artwork & Legal: Lock label elements (claims, statements, barcodes) and approve print proofs.
• Pilot & Release: Provide pre-production samples; release lots with COA/SDS/TDS and retention sample registration.
• Logistics Kit: Share pallet map, packing list, SDS routing sheets, and a photo pack (filling, coding, cartoning, palletization) for intake QA.

Evidence & Assurance — Stability, Batch Control & Synergy Rationale

Stability & Storage Verification

Each lot is cleared against a validated cold/heat protocol and shelf-life is supported under labeled storage conditions. In-process controls cover appearance, pH, viscosity, suspensibility, and fineness/screening benchmarks to ensure handling consistency and nozzle safety.

Batch Release & Traceability

A COA is issued per lot; retention samples are archived for the labeled duration. Any raw-material or packaging changes follow a documented change-control process. Photo documentation of production and palletization strengthens chain-of-custody and customer audits.

Synergy & Program Logic (Principle-Level)

The dual-MOA (PSII + HPPD) approach delivers recognized additivity/synergy on tough broadleaves and select grasses, supporting fewer revisits and more predictable program costs when deployed within label windows and rotated with non-5/27 partners.

Evidence is presented at a summary level. Detailed reports or third-party summaries may be shared under NDA to qualified buyers.

FAQ