POMAIS Paclobutrazol 25% SC

Short Description:

Paclobutrazol 25% SC is a triazole plant growth regulator (PGR) that inhibits gibberellin (GA) biosynthesis—specifically at the ent-kaurene oxidation (P450) step—so plants put less energy into vertical stretch and more into compact, sturdy growth. In practice, you get shorter internodes, tighter canopies, stronger stems, improved lodging resistance, and, in certain fruit programs (e.g., mango), more reliable flowering windows when labels allow. The active is systemic (xylem-biased) and moves to meristems where growth is regulated. The SC (suspension concentrate) platform delivers dust-free handling, stable suspensions, and clean measuring for greenhouse and field operations. Always follow the product label and local regulations.

Active Ingredient: Paclobutrazol 25%SC

CAS No.: 76738-62-0

Classification: Plant growth regulator

Application: Paclobutrazol is a plant growth regulator, which has the effects of delaying plant growth, inhibiting stem elongation, shortening internodes, promoting plant tillering, increasing plant stress resistance, and increasing yield. Paclobutrazol is suitable for crops such as rice, wheat, peanuts, fruit trees, tobacco, rapeseed, soybeans, flowers, lawns, etc., and the use effect is remarkable.

Packaging: 1L/bottle

MOQ: 500L

Other formulations: Paclobutrazol 15%WP

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Product Detail

Product Tags

Introduction

Item	Detail
Active ingredient / Strength	Paclobutrazol 25% SC (suspension concentrate, w/w)
Chemical class	Triazole plant growth regulator (PGR)
Mode of Action	Gibberellin (GA) biosynthesis inhibitor — blocks ent-kaurene oxidation (P450) to suppress internode elongation and vertical stretch
Systemicity / Movement	Xylem-mobile, accumulates at meristems where growth is regulated
Primary agronomic outcomes	Compact canopy, shorter internodes, sturdier stems, improved lodging tolerance; in certain fruit programs (e.g., mango) supports flowering management where label permits
Typical use arenas (label-dependent)	Cereals (e.g., rice/wheat) for lodging risk management; fruit trees (e.g., mango) for vegetative control/flowering; ornamental/greenhouse crops for compact, uniform growth
CAS No.	76738-62-0
Formulation advantages	Dust-free handling, clean measuring; engineered for stable suspensions and consistent re-dispersion
Quality & docs	Lot-wise COA / SDS / TDS; QC aligned with FAO/WHO formulation guidance & CIPAC methods for SC
Packaging & OEM	1 L (standard) or custom; multilingual GHS private-label, barcode/QR traceability

Mode of Action

Paclobutrazol is a triazole plant growth regulator that suppresses plant height by inhibiting gibberellin (GA) biosynthesis at the ent-kaurene oxidase (KO, CYP701A) step. KO is a cytochrome P450 that converts ent-kaurene → ent-kaurenoic acid → GA₁₂; blocking this step reduces downstream bioactive GAs. Agronomic results you can bank on: shorter internodes, tighter canopies, reduced apical stretch, sturdier stems, and, where labels allow, more uniform flowering windows (e.g., mango). Mechanistically, paclobutrazol is xylem-mobile and accumulates at meristems, so the growth-regulating effects express where elongation is driven. Field literature further links PBZ to improved lodging tolerance in cereals via changes in stem mechanics. All uses are label-led; verify crop, site, and timing on the approved label in your market.

Formulation Advantages — 25% SC

Dust-free handling, clean measuring. Suspension concentrates (SC) disperse solid actives in water, cutting dust versus powders and supporting cleaner loading in greenhouses and field sheds. FAO/WHO’s specification framework defines SCs and their key physical property targets used at batch release.
Fast wetting → stable spray suspensions. SCs are engineered to redisperse rapidly on dilution and hold uniformity under normal agitation—validated by CIPAC suspensibility tests (MT 160/161) and related methods (e.g., pourability MT 148.1; wet-sieve MT 185; dispersion stability MT 180). These metrics reduce streaking and dose variability across the boom.
Storage-ready for distribution. Registration chemistry relies on OECD/SANCO storage-stability guidance—confirming formulation integrity (assay, pH, appearance, suspensibility) after heat-shock or ambient warehouse holds—so inventory can move globally with predictable shelf performance.
Equipment compatibility. Water-based SCs fit standard sprayer SOPs (inductor → main tank → agitation) and minimize solvent handling compared with ECs; co-formulant design (rheology modifiers, dispersants) is tuned for shear stability and re-dispersion during transport.

Use Scenarios

Cereals (rice, wheat) — structure for lodging risk control.
Deployed at label-approved timings, paclobutrazol programs drive shorter internodes, thicker culm walls, higher lignification, and improved canopy light use—outcomes repeatedly linked to better lodging resistance and yield stability in modern trials. Align your windowing with crop stage guidance on the local label and rotate with non-PGR tools inside your agronomy plan.

Fruit trees (mango) — vegetative control & flowering management.
Where permitted, paclobutrazol is a mainstay to tame vegetative vigor, synchronize or extend flowering windows, and stabilize off-season supply in commercial mango programs. Evidence spans industry reports and peer-reviewed studies; always conform to label-specified use sites and timing for your country.

Ornamental/greenhouse production — compact, uniform retail form.
In protected ornamentals, paclobutrazol is positioned to reduce internode stretch and deliver tight, marketable plant architecture across bedding plants, bulbs, herbaceous and woody crops; permitted application methods and crop lists are label-defined.

Additional niches (where registered).
Selective turf and arbor applications are documented for canopy density/quality and shoot/cambial growth moderation; these are site-specific and must follow local registrations and stewardship requirements.

Use Principles

Work strictly to the approved label. Labels define eligible crops/sites, application methods (spray/drench/trickle), timing windows, REI/PHI, PPE, and any greenhouse-only restrictions. For example, paclobutrazol labels for ornamentals limit use to protected container crops and prescribe specific handling precautions.
Choose the right application pathway. Drenches generally deliver longer-lasting, more uniform height control than foliar sprays on ornamentals; follow the crop-specific tables and method restrictions provided on your local label.
Prevent phytotoxicity: test before you scale. Different species/cultivars respond differently; labels instruct small-lot tests before whole-house deployment and caution against treating stressed plants (heat, drought, transplant shock).
Compatibility is not universal. Conduct a jar test and follow each partner’s label for order-of-mixing and pH guidance; never exceed the most restrictive label among tank-mix partners.
Worker protection & hygiene. Observe the label’s REI and required PPE during mixing/loading and application; maintain clean handling (no eating/drinking) and wash exposed skin after work.
Storage & stewardship. Store tightly closed in a cool, dry, well-ventilated area away from ignition sources. Paclobutrazol is classified on SDS as a flammable solid and hazardous to aquatic life—manage inventory and spills accordingly and follow local disposal rules.
Crop/site compliance varies by market. Agricultural uses (e.g., mango programs) and ornamental greenhouse uses appear on different national labels. Validate your country’s approved sites and any greenhouse-only limitations before commercialization.

Compatibility & Tank Mix

Respect label prohibitions. Several paclobutrazol labels explicitly state “do not mix with other spray chemicals.” This applies to common brands in greenhouse ornamentals and to agricultural SC registrations; when your country’s label says no tank mix, run it solo.
When a label permits mixing, validate first. Run a jar test with your actual water source and each intended partner. Check for creaming, flocculation, heat, precipitate, pH drift. Only scale up if the mixture remains uniform after 15–30 minutes of gentle agitation.
Follow an accepted mixing order. Where mixing is allowed, load hard-to-disperse solids first, true solutions last—e.g., WDG/WP → SC → EC → SL/SN → adjuvants—keeping agitation on. This reduces gelling, foam layering, and nozzle plugging.
Mind water quality. High pH and bicarbonates can destabilize suspensions and reduce active longevity; extension guidance recommends controlling pH/alkalinity within label allowances and avoiding contaminated/dirty water.
Agitate SCs continuously. Suspension concentrates require continuous agitation to keep particles in uniform suspension during mixing and spraying; this is reflected in SC definitions and storage/handling guidance.
Adjuvants: only if the label allows. Some paclobutrazol labels forbid adjuvants or any tank partners; others are silent. If not explicitly permitted, don’t add. When permitted, choose chemistries that don’t shift pH outside the acceptable window and avoid strong solvents that can destabilize SC.

Quality & Stability

Batch-release controls (SC): Verify assay (a.i.), appearance/homogeneity, pH (aqueous extract), viscosity/rheology, wet-sieve residue, and suspensibility/dispersion—the core FAO/WHO specification pillars for pesticide formulations. For SCs, CIPAC MT 161 (suspensibility) and MT 160/160.1 (spontaneity of dispersion) are the reference methods used by QC and regulators.
Storage stability (shelf-life argument): Use accelerated storage (e.g., CIPAC MT 46 at 54 °C, 14 days) alongside ambient holds to demonstrate formulation integrity (assay, pH, appearance, suspensibility) and packaging compatibility. OECD guidance notes that well-designed accelerated data can underpin a minimum two-year ambient stability claim, subject to local authority acceptance.
Handling robustness: Confirm re-dispersion after transport (no hard-settling; uniform suspension under normal agitation) and acceptable pourability (CIPAC MT 148.1) to reduce nozzle plugging and dose non-uniformity at the sprayer. Keep continuous agitation in SOPs for SCs to maintain uniformity during application.
Documentation pack: Release each lot with a COA covering the above endpoints; maintain SDS/TDS and retain samples for traceability. Align data presentation with current EU/SANTE and national expectations for phys-chem and storage-stability sections.

HSE & Stewardship

Worker protection & entry. Follow label PPE (chemical-resistant gloves, coveralls, eye protection, boots) and REI requirements; ornamental greenhouse labels for paclobutrazol specify a 12-hour REI and explicit PPE during mixing/loading and application.
Aquatic hazard management. Paclobutrazol is classified on multiple SDS as very toxic to aquatic life with long-lasting effects (H400/H410). Prevent releases, avoid drains/waterways, and collect spillage as instructed on product labels.
Storage & handling. Keep containers tightly closed in a cool, dry, well-ventilated area. SDS for paclobutrazol technical list flammable solid/combustible characteristics and aquatic toxicity—use your formulation-specific SDS to set warehouse SOPs and segregation rules.
Transport classification (verify per SDS). Paclobutrazol technical can ship as UN1325, Flammable solid, organic, n.o.s., Class 4.1; the 25% SC finished product may carry different transport classifications. Always follow the actual product SDS for shipping papers and placards.
Mixing/clean-out hygiene. Avoid aerosol/atomized mists in enclosed spaces; maintain good hygiene (no eating/drinking during handling; wash hands and exposed skin after work). Label and SDS language require careful handling and spill avoidance.
Waste & container disposal. Dispose of contents/containers via licensed hazardous-waste routes unless the label explicitly allows non-hazardous disposal for empty, triple-rinsed containers; never rinse to drains or open soil. Recent labels instruct “avoid release; collect spillage; dispose via licensed contractor.”
Label supremacy. REI/PHI, buffer zones, greenhouse-only restrictions, and application methods are jurisdiction-specific. Operate strictly as per your registered label; use the most restrictive requirements when multiple documents apply.

Packaging & OEM

Standard pack sizes. Default 1 L bottle for Paclobutrazol 25% SC; other markets commonly run 100 mL–1 L retail packs (and larger distributor fills) subject to registration. MOQ: 500 L for private-label starts.
Regulatory-ready labels. We deliver artwork aligned to GHS core elements—product identifier, supplier identification, signal word, pictograms, hazard & precautionary statements—mapped to your country rules (e.g., OSHA HazCom 1910.1200 in the U.S., CLP/EU where applicable).
FAO labelling good practice. Layout, legibility, language, and risk icons follow FAO “Guidelines on Good Labelling Practice for Pesticides,” ensuring regulators and auditors see the essentials at a glance.
Document pack per lot. COA + SDS + TDS with batch traceability; aquatic-hazard language (e.g., H400/H410) reflected on label/SDS per classification.
Private-label options. Multilingual GHS panels, brand colorways, barcode/QR, pallet & export carton schemes for your lane (EU/CIS/MENA/LatAm).
Supply chain. Palette of export-safe bottles/caps/liners, transport docs aligned to the finished SC classification in your SDS (different to paclobutrazol technical where UN1325 may apply).

Regulatory Notes

European Union. The EU Pesticides Database lists Paclobutrazol as an approved active substance under Reg. (EC) No 1107/2009; product authorisation occurs at Member-State level with crop/site conditions set nationally. You must validate your country’s authorised uses before commercialization.
United States/Canada (ornamentals). BONZI® labels and SDSs confirm greenhouse/ornamental positioning with REI/PPE and aquatic-hazard language. These labels are not field-crop labels; scope is containerized/protected crops as specified.
Southern Africa (fruit trees). CULTAR® (paclobutrazol SC) labels include mango and other fruit trees for vegetative control/flowering management under soil drench programs, with clear timing/handling constraints. Confirm the registered crops and methods per national label.
Australia (mango). Government/industry documents describe registered paclobutrazol use on mango to manage flowering windows (collar drench), reinforcing that agricultural uses are jurisdiction-specific and strictly label-led.
Label supremacy. Regardless of market, labels/SDS govern: permitted crops/sites, application methods (spray/drench/trickle), REI/PHI, buffer zones, and any greenhouse-only limitations. GHS/HazCom rules define label elements (signal word, pictograms, hazard/precautionary statements) for compliant private-label deployments.

FAQ

Q1. Can I position Paclobutrazol 25% SC on field crops in the EU?
Use is Member-State authorised; check the national registration for your target crop/site and follow the approved method/timing if present. The EU database shows the active is approved, but product uses are national.

Q2. Why do some labels say greenhouse-only while others show fruit trees?
Labels reflect jurisdictional approvals. For example, BONZI® is for ornamentals/greenhouses, while CULTAR® labels include fruit trees (e.g., mango) with drench directions. Always sell and use exactly as registered in your market.

Q3. What documents ship with each lot for audits?
We provide COA + SDS + TDS, plus multilingual GHS private-label artwork that satisfies signal word, pictograms, hazard & precautionary statements per HazCom/GHS.

Q4. Can I claim a two-year shelf life?
Shelf-life claims must be data-backed. Use accelerated and ambient storage datasets aligned to CIPAC/OECD/SANTE guidance to support the claim, then mirror storage conditions on label/pack. (We maintain stability packages for audits.)

Q5. Are there transport restrictions I should know?
Paclobutrazol technical can ship under UN1325 (Class 4.1, flammable solid); the 25% SC finished product may be differently classified. Always follow the finished product SDS for shipping papers and placards.

Q6. Do labels allow tank mixing or adjuvants?
Several paclobutrazol labels prohibit mixing with other spray chemicals. If your local label permits partners, jar-test first and follow the most restrictive label among all components.

Partner with POMAIS

Send us your country/market, target crops/sites, desired pack size, and label languages. We’ll return a registration-compliant spec, private-label mock-ups, stability data package, and a production slot aligned to your delivery window. Labels and usage remain strictly per local registration and SDS/HazCom/GHS requirements.