Copper Oxychloride 56% OP Oil dispersible powder · 56% Cu as metal
The most concentrated copper oxychloride formulation there is — and the reason is structural: an OP disperses in oil, and the oil is supplied by you at mixing rather than carried in the pack.
Chelora Chemicals is a copper oxychloride 56% OP supplier and sourcing partner serving registrants and distributors across the United States, with the copper basis and oil dispersibility agreed before dispatch.
- CAS Number (active)
- 1332-65-6
- Formulation type
- Oil dispersible powder — OP
- Copper as Cu
- 56% w/w
- Copper oxychloride content
- ≈ 95–97% of formulation
- 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: why 56% and not 50%. An OP carries no oil — the code means the powder is formulated to disperse into an oil carrier that you add at mixing. With no liquid carrier and only a thin oil-dispersing surfactant system in the pack, almost the whole formulation can be active: at 56% copper as metal and a technical grade running about 58% copper, the compound is roughly 95 to 97% of the product. That is why this grade sits above every water-based one.
From technical grade to oil dispersible powder
An OP is the shortest formulation route on this compound — mill, blend a thin oil-dispersing surfactant system, pack.
Why it matters: the oil is yours, not ours — which is what frees the pack to carry 95% active instead of 85%
What an oil dispersible powder is
OP is a CIPAC formulation code meaning oil dispersible powder — a powder designed to be dispersed in an organic liquid rather than in water. It is not a wettable powder, and it is not interchangeable with one: put an OP in a water tank and you will not get the suspension you expect.
The reason the grade exists is low-volume and oil-based spraying. Where water is scarce, where a crop is sprayed from the air or by mistblower at very low volumes, or where an oil carrier improves adhesion and rainfastness on waxy foliage, an oil-based copper spray does a job a water-based one cannot. Tree crops are the classic case. The chemistry is unchanged — same compound, same FRAC M1 multi-site contact action.
What the specification controls
- Copper as Cu, 56% w/w. The declared active content — roughly 95 to 97% of the pack as compound.
- Dispersibility in oil, not water. The defining parameter, and the one a WP specification never tests.
- Suspension stability in the oil carrier. Agreed against the carrier you actually intend to use.
- The water-based grades for comparison: 50% WP and 50% WG.
Handling character
Copper oxychloride 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 | 56% w/w ± tolerance |
| Copper oxychloride | ≈ 95–97% of formulation |
| Dispersibility in oil | Per agreed specification & carrier |
| Suspension stability in oil | Per agreed specification |
| Moisture & 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 | Green to blue-green powder |
| Active molecular weight | 213.57 g/mol |
| Disperses in | Oil — not water |
| Water solubility (active) | Insoluble |
| Mode of action | Multi-site contact; FRAC M1 |
| Active density | 3.5 g/cm³ |
| Active decomposition | ≈ 250 °C |
Figures compiled from public reference data for CAS 1332-65-6 and from published copper oxychloride specifications, rounded for readability. Dispersibility and suspension stability depend on the oil carrier used, so they are agreed against your carrier rather than quoted as constants. Treat the table as orientation, not as a specification.
Where an oil dispersible copper is used
Low-volume spraying, oil-based programs and waxy foliage.
Oil-based & low-volume spraying
Where water is scarce or application is by mistblower or air at very low volumes, an oil carrier delivers the copper that water cannot.
- Dispersibility agreed to your carrier
- 56% Cu as metal
- Suspension stability specified
Tree crops & waxy foliage
An oil carrier improves adhesion and rainfastness on waxy leaf surfaces, the classic case for this formulation.
- Consistent copper assay
- FRAC M1 multi-site
- Label claims are registrant-specific
Concentration & freight economy
At roughly 95 to 97% compound, an OP carries more copper per tonne shipped than any water-based grade.
- Highest copper loading in the family
- Fewer tonnes per hectare treated
- Bulk and bagged supply
Resistance management programs
FRAC M1 multi-site activity is unchanged by the carrier, so the rotation benefit is identical to the WP.
- FRAC M1 on documentation
- Read the crop protection guide
- Program guidance on request
Registrant & repacker supply
Bulk supply to registrants and repackers carrying an oil-based copper line alongside water-based grades.
- 25 kg bags and bulk bags
- Second formulator qualified
- Specification held across the contract
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 copper oxychloride 56% OP 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 56% OP 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 bulk bags |
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 56% OP
Chelora Chemicals is a copper oxychloride OP supplier and sourcing partner, not a manufacturer. The variable that decides whether this grade works is not the copper assay — it is whether it disperses in the oil you actually use, and that is carrier-specific.
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 say plainly when an OP is the wrong choice: if you are spraying water-based at conventional volumes, the 50% WP or WG is the right product and an OP will disappoint you.
- Dispersibility tested against your actual oil carrier. An OP that disperses in one oil may not in another; this is not a universal parameter.
- The copper basis stated unambiguously. 56% copper as metal, roughly 95% as compound — both figures on every quote.
- We will tell you if you want a WP instead. An OP in a water tank does not work, and the mistake is expensive.
- UN 3077 documentation prepared before booking. Class 9 on aquatic toxicity grounds; the paperwork is not optional.
- FIFRA position settled honestly. A pesticide product must itself be EPA-registered for US sale or use. We coordinate; we do not register.
- Batch traceability to the producing formulator. Full chain of custody documentation on request.
Bagged or bulk bagged
25 kg bags, bulk bags or fiber drums — 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.
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.
1 kg · 5 kg sealed packs
Small sealed packs in cartons to your approved label artwork where you hold the registration.
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 so you can run dispersion trials in your own oil carrier 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 an oil dispersible powder is built
An OP starts where every copper oxychloride formulation does — technical grade milled to a controlled particle size. What changes is the surfactant system. A wettable powder carries wetting agents and dispersants chosen to work in water; an OP carries a system chosen to work in oil. They are not interchangeable, and that single substitution is the whole formulation.
Because no liquid carrier travels in the pack and the surfactant loading is thin, the active can occupy almost the entire formulation. At 56% copper expressed as metal, against a technical grade running about 58% copper, the compound works out at roughly 95 to 97% of the product. Compare that with a 50% WP at about 85% compound, or a 35% WP at about 60%.
The mode of action is untouched by any of this. Copper oxychloride remains a multi-site contact fungicide, FRAC group M1, acting on several biochemical targets rather than one — which is why it stays a resistance-management anchor whatever carrier delivers it.
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 | Oil dispersible powder — OP |
|---|---|
| CIPAC code meaning | Disperses in oil, not water |
| Declared basis | Copper expressed as metal |
| Compound content | ≈ 95–97% of the formulation |
| Why so concentrated | No oil carried in the pack |
| Mode of action | Multi-site contact — FRAC M1 |
The copper range and related inorganics
The other copper grades and the salts and acids supplied from the same desk.
Copper oxychloride 56% OP, answered
What does OP mean on a pesticide formulation?
Why is this grade 56% when the WP is 50%?
Does the 56% mean copper or copper oxychloride?
When would I use an OP instead of a WP?
Which oil carrier should I use?
Does the oil carrier change the efficacy?
Is the resistance-management benefit the same?
Is it dangerous goods to ship?
Can I sell or apply this in the United States?
Do you supply copper oxychloride 56% OP in the United States?
Get a quote on copper oxychloride 56% OP
Tell us which oil carrier you intend to use — that decides the dispersibility specification — along with your copper basis, pack format and US delivery point. We will send trial packs so you can run the dispersion yourself before committing.