Bordeaux Mixture 20% WDG (Blue) Blue shade · 20% Cu as metal · WDG
The hardest of the Bordeaux grades to hold on shade — because granulation changes how the color reads, and attrition changes it again in transit.
Chelora Chemicals is a blue Bordeaux 20% WDG supplier and sourcing partner serving registrants and distributors across the United States, with shade, dustiness and attrition all 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
- Shade
- Blue, matched to reference sample
- FRAC group
- M1 — multi-site contact
- Appearance
- Blue to blue-green granule
- Transport
- UN 3077 · Class 9 · PG III
- HS Code
- 3808 92
Note: shade is harder to hold in a granule than in a powder. Granulation changes how color reads: the granule surface, the size distribution and the binder all affect what the eye sees, even at identical composition. Worse, attrition works against the shade too — granules that crumble back to powder in transit present a finer surface and read differently from the lot you approved. On this grade, shade and attrition resistance have to be specified together.
Shade, through granulation
Every step from blend to granule moves the appearance. Holding a shade through all of them is the specification.
Why it matters: attrition is both a dust problem and a shade problem on this grade — the same parameter protects you from each
Why shade is harder in a granule
Blue Bordeaux 20% WDG carries the same chemistry as every other Bordeaux grade — copper sulfate and hydrated lime at 20% copper expressed as metal, FRAC M1 multi-site contact — in a dust-free granule with the shade written into the specification.
Combining those two requirements is genuinely harder than either alone. In a powder, shade follows composition and fineness. In a granule, it also follows the granule surface, the size distribution and the binder, so two lots of identical composition can read differently. And attrition makes it worse: granules that crumble back toward powder in transit present a finer, more light-scattering surface than the lot you signed off. That is why attrition resistance is not only a dust specification on this grade — it is a shade specification too.
What has to be specified together here
- Shade, against a retained reference sample. There is no published numeric standard for Bordeaux color.
- Attrition resistance. Protects both the dust-free claim and the shade you approved.
- Size distribution. Changes perceived color independently of composition.
- The powder equivalent: blue Bordeaux technical.
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 |
| Shade | Matched to retained reference sample |
| Copper as Cu | 20% w/w ± tolerance |
| Dispersibility & suspensibility | Per agreed specification |
| Dustiness & attrition resistance | Per agreed specification |
| Size distribution & flowability | 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 a shade-matched granule is specified
Branded granule lines where both dust-free handling and shelf consistency matter.
Branded retail granule lines
Where a premium granule is sold on appearance as well as handling, shade consistency carries the brand.
- Retail packs to your label artwork
- Shade held across the contract
- Retained reference per lot
Operator exposure reduction
The granule removes airborne dust at mixing and loading — the highest-exposure step, and the worst one on Bordeaux historically.
- Dustiness specified per order
- Attrition resistance held
- No stock solutions, no sequencing
Counterfeit differentiation
A consistently held house shade on a granule is harder to copy than on a powder, and is one of the cheaper authenticity signals available.
- Retained reference per lot
- Size distribution fixed
- Batch traceability to formulator
Dispersibility & tank behavior
Granules disintegrate on contact with water with no powder clumping, though mechanical agitation is still required.
- Dispersibility specified
- Suspensibility specified
- Same-day use once mixed
Dormant-season disease control
Unchanged: peach leaf curl, shot hole, citrus brown rot, fire blight and walnut blight, in markets where registered.
- FRAC M1 multi-site
- Dormant timing is standard
- Label claims are registrant-specific
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 blue 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
Blue 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 blue 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.
- Shade reference set on the granule, not on powder. A granule reflects light differently from loose powder of identical composition, so a powder reference will not transfer.
- Attrition resistance does double duty. It protects the dust-free claim and the shade — crumbled granules read finer and bluer than the lot you approved.
- Size distribution fixed alongside shade. It moves perceived color independently of composition.
- Lime ratio fixed as part of the shade specification. It drives color and buffers phytotoxicity, so it cannot float.
- Second source shade-qualified on granules in advance. Qualifying during a supply interruption is too late.
- Honest advice on whether you need it. If the color is not exposed in your end use, we will quote the standard WDG instead.
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.
Holding a shade through the granulator
The blend is made the same way as any Bordeaux: copper sulfate and hydrated lime combined under control, with the copper sulfate grade, the lime ratio and the fineness setting the shade. Those three are the same variables that govern color in the powder grades.
Granulation then adds variables the powder does not have. The blend is agglomerated with a binder into free-flowing granules, and the granule surface, the size distribution and the binder itself all affect how the color reads. A granule reflects light differently from a loose powder of the same composition, so a shade reference set on powder will not transfer — the reference has to be set on the granule as it will be supplied.
The last variable is attrition, and it is the one that catches people. Granules weak enough to crumble in transit present a finer, more light-scattering surface on arrival than the lot that was approved. So on this grade attrition resistance does double duty: it protects the dust-free claim the granule is bought for, and it protects the shade. Both are specified, and both are checked on the granule as supplied.
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 |
| Shade drivers, blend | Grade, lime ratio, fineness |
| Shade drivers, granule | Surface, size distribution, binder |
| Hidden shade risk | Attrition back toward powder |
| How to specify | Reference sample set on the granule |
The Bordeaux range and the fixed coppers
The other Bordeaux grades and the copper chemistries supplied from the same desk.
Blue Bordeaux 20% WDG, answered
Why is shade harder to hold in a granule than a powder?
How does attrition affect the shade?
Is blue Bordeaux a different chemistry?
What drives the shade in the blend itself?
Is there an industry standard for the blue?
What does the 20% mean?
Does it still need same-day use?
Is it still phytotoxic and corrosive?
Is it dangerous goods to ship?
Do you supply blue Bordeaux 20% WDG in the United States?
Get a quote on blue Bordeaux mixture 20% WDG
Ask us for trial granules so you can set the shade reference on the granule itself rather than on powder — then send the copper basis, lime ratio, attrition and dustiness specification, pack format and US delivery point.