Bordeaux Mixture 20% WDG 20% Cu as metal · WDG · CAS 8011-63-0
The furthest a Bordeaux product gets from the thing that made Bordeaux dangerous — no stock solutions, no sequencing, and now no dust either.
Chelora Chemicals is a Bordeaux mixture 20% WDG supplier and sourcing partner serving registrants and distributors across the United States, with dispersibility, attrition and dustiness agreed before dispatch.
- CAS Number
- 8011-63-0
- Formulation type
- Water dispersible granule — WDG
- Copper as Cu
- 20% w/w
- Composition
- Copper sulfate + hydrated lime
- Copper sulfate basis
- ≈ 79% pentahydrate equivalent
- FRAC group
- M1 — multi-site contact
- Appearance
- Blue to blue-green granule
- Transport
- UN 3077 · Class 9 · PG III
- HS Code
- 3808 92
Note: a WDG is judged on the granule, not just the copper. Three parameters exist here that have no equivalent on a powder: dustiness, attrition resistance — whether the granules survive handling without crumbling back to powder — and flowability. Attrition is the one most often left off a purchase order, and granules that crumble in transit hand you back the dust you paid to avoid. The 20% is copper expressed as metal, roughly 79% copper sulfate pentahydrate equivalent.
From field mix to dust-free granule
Each step in Bordeaux’s commercial history has removed a hazard. The granule removes the last one.
Why it matters: Bordeaux was always the most hazardous copper to prepare — stock solutions, lime, and a sequence that mattered. A granule is the opposite of all of that
Why a granule suits Bordeaux particularly well
Bordeaux mixture 20% WDG carries the same active content as the 20% WP — 20% copper expressed as metal, the same copper sulfate and lime chemistry, the same FRAC M1 multi-site contact action. What differs is that the formulation is granulated, so it pours rather than puffs and the granules disintegrate on contact with water in the tank.
The case for a granule is stronger here than on any other copper. Bordeaux has always been the most hazardous copper to prepare: concentrated copper sulfate stock solution, hydrated lime, and a sequence that had to be right or the copper would not dissolve. The WP removed the stock solutions. The granule removes the dust at mixing and loading, which is the highest-exposure step left in the operation.
What a WDG specification controls that a WP does not
- Dustiness. The reason the form exists — specified per order and verified on the granule as supplied.
- Attrition resistance. Whether granules survive handling without crumbling back to powder.
- Flowability. Decides measuring accuracy and how cleanly the pack empties for triple-rinse disposal.
- The powder form for comparison: Bordeaux 20% WP.
Handling character
Bordeaux is a Class 9 dangerous good, corrosive to equipment and phytotoxic on new growth. Full detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | Blue to blue-green free-flowing granule |
| Copper as Cu | 20% w/w ± tolerance |
| Copper sulfate to lime ratio | Per agreed specification |
| Dispersibility & suspensibility | Per agreed specification |
| Dustiness & attrition resistance | Per agreed specification |
| Flowability & wet sieve residue | Per agreed specification |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | Blue to blue-green granule |
| Nature | Mixture, not a single compound |
| Water behavior | Granules disintegrate and disperse |
| Mode of action | Multi-site contact; FRAC M1 |
| Tank stability | Use the same day once mixed |
| Rainfastness | Longer lasting than fixed coppers |
| Equipment | Highly corrosive; rinse thoroughly |
Characteristics compiled from public agricultural extension guidance on Bordeaux mixture. Because the product is a mixture rather than a single compound, its behavior depends on the copper sulfate to lime ratio. Treat the table as orientation, not as a specification.
Where the granule form earns its premium
Operator safety, accurate measuring, and the same dormant-season programs.
Operator exposure reduction
Bordeaux was always the worst copper to prepare. A granule removes airborne dust at mixing and loading, the highest-exposure step left.
- Dustiness specified per order
- Attrition resistance held
- No stock solutions, no sequencing
Dispersibility & tank behavior
Granules disintegrate on contact with water, so there is no powder clumping on tank fill — though mechanical agitation is still needed.
- Dispersibility specified
- Suspensibility specified
- Mechanical agitation required
Dormant-season disease control
Unchanged from the WP: peach leaf curl, shot hole, bacterial blast and brown rot on citrus, fire blight and walnut blight.
- FRAC M1 multi-site
- Dormant timing is standard
- Label claims are registrant-specific
Accurate measuring & clean packs
Free-flowing granules measure accurately and empty cleanly, leaving less residue for triple-rinse disposal.
- Flowability specified
- 1 kg and 5 kg retail packs
- Artwork to your registrant label
Registrant & repacker supply
Bulk supply to registrants positioning a premium granule alongside a WP line.
- 25 kg bags and bulk bags
- Ratio held across the contract
- Second formulator qualified
Import & FIFRA coordination
A pesticide import needs a Notice of Arrival on EPA Form 3540-1, and US sale or use needs an EPA-registered product.
- NOA coordination with your broker
- UN 3077 documentation prepared
- Registration remains yours
Delivered to US plants and ports
We ship Bordeaux mixture 20% WDG to nominated delivery points across the United States. The regions below are destinations we serve — Chelora Chemicals is a sourcing and supply partner, not a US manufacturer, and does not hold US stock.
Gulf Coast
The largest US chemical cluster, and the usual entry point for bulk consignments.
- Houston & Galveston, TX
- New Orleans & Baton Rouge, LA
- Mobile, AL
Northeast
Container and bulk delivery into the mid-Atlantic and New England manufacturing belt.
- Newark & Elizabeth, NJ
- Philadelphia, PA
- Boston, MA
Southeast
Port-side delivery for the Carolinas, Georgia and Florida processing plants.
- Savannah, GA
- Charleston, SC
- Jacksonville, FL & Norfolk, VA
Midwest & Great Lakes
Inland rail and truck forwarding from the nearest coastal port to the industrial Midwest.
- Chicago, IL
- Detroit, MI
- Cleveland & Columbus, OH
West Coast
Pacific routing for West Coast processors and formulators.
- Los Angeles & Long Beach, CA
- Oakland, CA
- Seattle & Tacoma, WA
Southwest & Mountain
Inland delivery to interior states, forwarded from the Gulf or Pacific gateway.
- Dallas–Fort Worth, TX
- Phoenix, AZ
- Denver, CO
Importing into the United States
Bordeaux mixture 20% WDG is a TSCA-regulated chemical substance. Under TSCA section 13 the importer of record, or its authorized agent, must certify to US Customs and Border Protection that each shipment either complies with TSCA or is not subject to it. We confirm the substance's TSCA Inventory status and agree in writing who files that certification before the first consignment moves.
Which party carries that duty follows the Incoterm. On FOB, CFR or CIF terms it is usually the US buyer; on DDP terms it can be the seller or its agent. Safety data sheets and labels are supplied to OSHA's updated Hazard Communication Standard, and the UN 3077 Class 9 transport documentation is prepared before booking.
| Item | How it works |
|---|---|
| Delivery points | Any nominated US plant, terminal or port of discharge |
| Incoterms quoted | FOB · CFR · CIF · DDP |
| Importer of record | Agreed in writing before the first shipment |
| TSCA certification | Section 13 positive certification filed at entry |
| Documentation | Batch COA, SDS, packing list, certificate of origin |
| Pack formats | 25 kg bags or retail packs |
Note: regional coverage describes where we deliver, not where we hold inventory. Lead time depends on producer scheduling and ocean transit to your nominated US port — we confirm both in the quotation.
How we supply Bordeaux mixture 20% WDG
Chelora Chemicals is a Bordeaux mixture supplier and sourcing partner, not a manufacturer. The thing to settle before quoting is the copper basis and the lime ratio, because CAS 8011-63-0 describes a mixture and says nothing about either.
We place your order with whichever qualified formulator best matches your specification, your price point and your delivery window, and settle the FIFRA and import position before booking.
We will also tell you when a fixed copper is the better product. If you are spraying into new growth, Bordeaux is the wrong tool — it is more phytotoxic than copper hydroxide or copper oxychloride, and that is a crop-damage risk rather than a preference.
- Attrition resistance specified, not assumed. Granules that crumble in transit hand you back the dust problem you paid to avoid — and it is the parameter most often left off a purchase order.
- Dustiness verified on the granule as supplied. The whole commercial case for a WDG rests on it, and on Bordeaux that case is stronger than on any other copper.
- Dispersibility and suspensibility agreed up front. A granule strong enough to ship must still fall apart in the tank; the two pull against each other.
- Copper basis stated as metal, with the arithmetic shown. 20% copper as Cu is roughly 79% copper sulfate pentahydrate.
- Lime ratio agreed in writing. A 20% copper blend runs leaner on lime than a traditional 1:1 field mix, and lime is what buffers the phytotoxicity.
- Same-day use made explicit. The granule fixes dust and preparation, not tank life.
Bagged or in retail packs
25 kg bags, bulk bags or retail packs — all to UN 3077 marking and labeling requirements.
25 kg poly-lined bags
Moisture-barrier bags on stretch-wrapped pallets, UN-marked, the standard commercial unit.
1 kg · 5 kg sealed packs
Small sealed packs in cartons to your approved label artwork where you hold the registration.
500–1,000 kg bulk bags
Liner-fitted bulk bags for repacking operations and large-scale distribution.
Fiber drums
Sealed fiber drums where extra moisture protection or extended storage is needed.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with dangerous goods documentation filed before booking.
Trial / sample quantities
Small packs dispatched for suspension and crop safety trials before a commercial order.
Class 9, corrosive and phytotoxic — all three matter
Bordeaux carries three separate cautions that the fixed coppers do not all share: it is very toxic to aquatic life, which drives the Class 9 transport classification; it is highly corrosive to spray equipment; and it is more phytotoxic than the fixed coppers. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document.
Classified hazards
H302Harmful if swallowed.H315Causes skin irritation.H318Causes serious eye damage.H410Very toxic to aquatic life with long lasting effects.
Three practical cautions from agricultural extension guidance. Phytotoxicity: applying Bordeaux to newly growing leaves can injure new growth, which is why it is principally a dormant-season material. Equipment corrosion: it is highly corrosive, and guidance is to rinse spray equipment at least three times with a little vinegar added to neutralize the high-pH residue. Same-day use: once mixed it begins losing effectiveness immediately, and no product form changes that. Dry ingredients also need a tank with mechanical agitation. On US registration the ordinary FIFRA rule applies — the product must itself be EPA-registered for sale or use here, that registration sits with the registrant and never with a supplier, and imports require a Notice of Arrival, EPA Form 3540-1, filed with Customs.
Storage
Store in sealed, moisture-barrier packaging in a cool, dry, well-ventilated area away from food, seed and feedstuffs. Keep dry: the blend cakes if it takes up moisture, and the lime fraction carbonates on exposure to air, which changes the material over time. Bunded or contained storage is advised because of the aquatic hazard.
Handling
Handle with dust control, impervious gloves and tight-fitting eye protection; the material causes serious eye damage and is harmful if swallowed. Prevent any release to drains or watercourses. Follow the exposure controls set out in the batch SDS.
Transport
Bordeaux mixture is classified as dangerous goods for transport on the basis of aquatic toxicity, normally shipped as UN 3077, Environmentally hazardous substance, solid, n.o.s., Class 9, Packing Group III. Marked and labeled packaging, a dangerous goods declaration and compliant documentation are required. We confirm and document the classification for your specific grade, packaging and destination before booking.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Copper basis, copper sulfate to lime ratio, shade where specified, and formulation parameters confirmed before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS, FIFRA position and UN 3077 dangerous goods paperwork checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How a Bordeaux WDG is built
A Bordeaux water dispersible granule starts where the wettable powder does — copper sulfate and hydrated lime combined under control and milled with a wetting agent and dispersant. The extra step is granulation: the blend is agglomerated, usually by extrusion or fluid-bed granulation, into free-flowing granules held together by a binder.
The engineering problem is that the granule must be strong enough to survive handling and weak enough to fall apart in water. Too little binder and the granules attrit back to powder in transit, handing you the dust the form exists to remove. Too much and they sit in the tank undispersed. Dispersibility and attrition resistance pull against each other, which is why both are specified.
None of this changes the chemistry. The copper is declared as metal at 20%, roughly 79% copper sulfate pentahydrate equivalent; the mode of action is FRAC M1 multi-site contact; the material is still more phytotoxic than a fixed copper and still corrosive to equipment; and the mixed spray must still be used the same day.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Formulation type | Water dispersible granule — WDG |
|---|---|
| Declared basis | Copper expressed as metal |
| Compound equivalent | ≈ 79% copper sulfate pentahydrate |
| Bought for | Dust reduction and handling, not efficacy |
| Granule-specific tests | Dustiness, attrition, flowability |
| What it does not fix | Same-day tank life |
The Bordeaux range and the fixed coppers
The other Bordeaux grades and the copper chemistries supplied from the same desk.
Bordeaux mixture 20% WDG, answered
What is the difference between the WDG and the WP?
Why does the dust matter more on Bordeaux than on other coppers?
Which specification parameters matter on a WDG?
Can the granules crumble back into powder?
What does the 20% mean?
Does the granule last longer in the tank?
Is it still phytotoxic and corrosive?
Is it dangerous goods to ship?
Can I sell or apply this in the United States?
Do you supply Bordeaux mixture 20% WDG in the United States?
Get a quote on Bordeaux mixture 20% WDG
Send us your required copper basis, lime ratio, dispersibility, dustiness and attrition specification, pack format and US delivery point — and tell us whether you hold a product registration.