Copper Oxychloride 35% WP 35% Cu as metal · WP · CAS 1332-65-6
The lower-loading grade, chosen deliberately — less copper per hectare where phytotoxicity or soil copper accumulation is the constraint, and more formulation room where copper is being blended with other actives.
Chelora Chemicals is a copper oxychloride 35% WP supplier and sourcing partner serving distributors and registrants across the United States, with suspensibility, sieve residue and UN 3077 documentation agreed before dispatch.
- CAS Number (active)
- 1332-65-6
- Formulation type
- Wettable powder — WP
- Copper as Cu
- 35% w/w
- Copper oxychloride content
- ≈ 595 g/kg (59.5%)
- Molecular formula (active)
- Cu₂(OH)₃Cl
- FRAC group
- M1 — multi-site contact
- Appearance
- Green to blue-green powder
- Transport
- UN 3077 · Class 9 · PG III
- HS Code
- 3808 92
Note: read the percentage carefully — this is the single most common ordering error on copper fungicides. The 35% here is copper expressed as metal, the convention used on FAO specifications and on US labels, which works out to roughly 595 g/kg of copper oxychloride compound. Some trade listings instead use the compound percentage, which is why the same material is sold elsewhere as "595 WP". If a quote does not state the basis, it is not a quote — we state both.
From technical grade to wettable powder
A WP is a milled and surfactant-blended dispersion system. The chemistry is set upstream; the formulation decides whether it actually sprays.
Why it matters: a lower copper loading is a deliberate agronomic choice — less copper per hectare on phytotoxicity-sensitive crops, and more room to co-formulate
Why a lower copper loading
Copper oxychloride 35% WP carries 35% copper expressed as metal — roughly 595 g/kg of copper oxychloride compound — against the 50% that is the global standard. It is the same compound, the same contact mode of action and the same FRAC group M1 multi-site chemistry. What differs is how much copper goes out per unit of product.
That is an agronomic and formulation decision, not a quality one. A lower loading means less copper applied per hectare, which matters on crops and growth stages where copper phytotoxicity is a real risk, and in systems where soil copper accumulation over years of spraying is the long-run constraint. It also leaves more room in the formulation for a co-formulated partner active or an adjuvant system.
What the formulation specification controls
- Copper as Cu, 35% w/w. The declared active content, equivalent to roughly 595 g/kg of compound.
- Suspensibility. How much stays dispersed in the spray tank after standing — the parameter that decides field performance.
- Wet sieve residue and wettability. A WP that will not wet out or that blocks nozzles is a rejected lot regardless of assay.
- The technical grade behind it: copper oxychloride technical.
Handling character
Copper oxychloride WP is a Class 9 dangerous good on aquatic toxicity grounds. Full detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | Green to blue-green free-flowing powder |
| Copper as Cu | 35% w/w ± tolerance |
| Copper oxychloride | ≈ 595 g/kg |
| Suspensibility | Per agreed specification |
| Wet sieve residue | Per agreed specification |
| Wettability & pH | 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 | Green to blue-green powder |
| Active molecular weight | 213.57 g/mol |
| Water solubility (active) | Insoluble — forms a suspension |
| Mode of action | Multi-site contact; FRAC M1 |
| Spray water pH | Do not buffer below pH 6 |
| Tank behavior | Suspension — requires agitation |
| Active density | 3.5 g/cm³ |
Figures compiled from public reference data for CAS 1332-65-6 and from published copper oxychloride WP label specifications, rounded for readability. Suspensibility, wet sieve and wettability are formulation parameters agreed per order rather than fixed constants. Treat the table as orientation, not as a specification.
Where the 35% loading is specified
Phytotoxicity-sensitive crops, copper-load management, and co-formulation.
Phytotoxicity-sensitive crops & stages
A lower copper load reduces the risk of leaf burn and fruit marking on sensitive crops and at sensitive growth stages.
- Lower copper per hectare
- Consistent copper assay
- Label claims are registrant-specific
Soil copper load management
Where years of copper spraying raise soil copper, a lower-loading product is one lever for reducing cumulative input.
- 35% Cu basis stated clearly
- Program positioning guidance
- Suspensibility specified
Co-formulation & blending
A lower copper loading leaves formulation room for a partner active or a fuller adjuvant system.
- Blend compatibility trials
- Specification agreed per order
- Second formulator qualified in reserve
Resistance management programs
FRAC M1 multi-site activity still applies at the lower loading, so the rotation benefit is retained.
- FRAC M1 stated on documentation
- Read the crop protection guide
- Program guidance on request
Distributor & retail packing
Packed into 1 kg and 5 kg retail units to your approved label artwork where you hold the product registration.
- Artwork to your registrant label
- Cartoned retail packs
- UN 3077 marking throughout
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. We coordinate with your broker.
- NOA coordination with your broker
- UN 3077 documentation prepared
- Registration remains yours
Delivered to US plants and ports
We ship copper oxychloride 35% WP 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
Copper oxychloride 35% WP 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 1 kg–5 kg 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 copper oxychloride 35% WP
Chelora Chemicals is a copper oxychloride WP supplier and sourcing partner, not a manufacturer. On a formulated product the assay is the easy part. What decides whether a lot performs is suspensibility, wettability and sieve residue — and we agree those before quoting, not after a field complaint.
We place your order with whichever qualified formulator best matches your specification, your price point and your delivery window, and we settle the FIFRA and import position before booking rather than after.
We are direct about the limit of what a supplier can do here: we do not hold EPA product registrations and cannot lend one. If your intended use needs a registered product in the US, that registration has to be yours.
- The percentage basis stated both ways on every quote. 35% copper as metal, ≈595 g/kg as compound — the ambiguity in trade listings is the commonest cause of a wrong order on this product.
- Suspensibility and wet sieve agreed up front. These are what decide field performance and nozzle behavior, and they are not visible in a copper assay figure.
- UN 3077 documentation prepared before booking. Marked packaging, a dangerous goods declaration and compliant paperwork — not assembled at the dock.
- FIFRA position settled honestly. A pesticide product must itself be EPA-registered for US sale or use, and an imported pesticide needs a Notice of Arrival on EPA Form 3540-1. We coordinate; we do not register.
- Label and pack artwork to your registrant. Where you hold a registration, packaging is produced to your approved label rather than to a generic one.
- Batch traceability to the producing formulator. Full chain of custody documentation on request.
Bagged, or in retail packs
25 kg bags, bulk bags or small 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, produced 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 suspensibility, compatibility and spray trials before a commercial order.
A Class 9 dangerous good - the aquatic hazard drives it
Copper oxychloride is moderately hazardous by ingestion and inhalation, and the classification that governs its logistics is aquatic toxicity. It is very toxic to aquatic life with long-lasting effects, which is what makes it a Class 9 dangerous good rather than an unregulated solid. The summary below is orientation only - the safety data sheet supplied with your specific batch is the authoritative document.
Classified hazards
H302Harmful if swallowed.H332Harmful if inhaled.H315Causes skin irritation.H410Very toxic to aquatic life with long lasting effects.
US registration and import, stated plainly. Copper oxychloride is an EPA-recognized pesticide active ingredient (PC code 023501) covered by the agency's copper reregistration decision, and a technical grade product appears in EPA's product label system. That is not the same as a licence to sell or apply a formulated product here: under FIFRA a pesticide product must itself be EPA-registered for US sale or use, that registration sits with the registrant and never with a raw material supplier, and an imported pesticide requires a Notice of Arrival, EPA Form 3540-1, filed with Customs. We supply material and documentation and will coordinate with your broker; we do not hold registrations and we will not tell you that you can apply unregistered material.
Storage
Store in sealed original packaging in a cool, dry, well-ventilated area, away from food, seed and feedstuffs, and away from strong acids. Keep off the floor and protect from moisture: damp material cakes, and the beta crystal form cakes more readily than the alpha form. Bunded or contained storage is advised because of the aquatic hazard.
Handling
Handle with dust control, impervious gloves, eye protection and respiratory protection where dust is generated; the material is harmful if swallowed or inhaled and irritates skin. Wash hands and face after handling. Prevent any release to drains, watercourses or soil. Follow the exposure controls set out in the batch SDS.
Transport
Copper oxychloride and its formulations are 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. This is a real difference from most of our inorganic range: marked and labeled packaging, a dangerous goods declaration and IMDG or DOT-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 content basis, crystal form, shade, particle size and moisture confirmed against your requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS, TSCA or 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 copper oxychloride WP is built
A wettable powder is a dispersion system, not a solution. Copper oxychloride is insoluble in water, so the formulation has to hold insoluble particles suspended in a spray tank long enough to be applied evenly. That is achieved by milling the technical grade to a controlled particle size and blending it with a wetting agent, a dispersant and an inert carrier.
The declared content is copper expressed as metal, following FAO specification and US label convention. At 35% copper as Cu that corresponds to roughly 595 g/kg of copper oxychloride compound, since technical grade itself carries about 59% copper. The remainder is carrier and surfactant system. This is exactly why the same formulation appears in some markets as "595 WP" — the compound basis — and why a quote that does not state the basis is not usable.
Copper oxychloride is a multi-site contact fungicide, FRAC group M1. It acts on several biochemical targets rather than one, which is why resistance to it has not developed the way it has to single-site chemistry — and why copper remains a resistance-management anchor in spray programs rather than a legacy product. One formulation note from published labels: do not buffer the spray water below pH 6.
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 | Wettable powder — WP |
|---|---|
| Declared basis | Copper expressed as metal |
| Compound equivalent | ≈ 595 g/kg copper oxychloride |
| Mode of action | Multi-site contact — FRAC M1 |
| Tank requirement | Suspension; requires agitation |
| Spray water | Do not buffer below pH 6 |
The copper oxychloride range and related inorganics
The other grades in this family, plus salts and acids supplied from the same desk.
Copper oxychloride 35% WP, answered
What does the 35% in copper oxychloride 35% WP mean?
Why choose 35% WP over the 50% grade?
Is the 35% grade less effective?
What is FRAC group M1 and why does it matter?
Which specification parameters actually matter?
Is it dangerous goods to ship?
Can I sell or apply this in the United States?
Do you hold the EPA registration?
What packing do you offer?
Do you supply copper oxychloride 35% WP in the United States?
Get a quote on copper oxychloride 35% WP
Send us your required copper basis, suspensibility and sieve specification, pack format and US delivery point — and tell us whether you hold a product registration, because that decides the import route. We will also tell you frankly if the 50% grade would serve you better.