Copper Oxychloride Technical (Blue) Blue shade · Cu₂(OH)₃Cl · CAS 1332-65-6
The shade is the specification here — same compound, same CAS, same copper content as the green technical grade, but a blue to blue-green appearance driven by crystal form and particle size rather than by any difference in chemistry.
Chelora Chemicals is a blue copper oxychloride supplier and sourcing partner serving pigment houses, colorant blenders and formulators across the United States, with the shade matched against a retained reference sample on every consignment.
- CAS Number
- 1332-65-6
- Chemical name
- Dicopper chloride trihydroxide
- Molecular formula
- Cu₂(OH)₃Cl
- Molecular weight
- 213.57 g/mol
- Copper content (as Cu)
- 56–59%
- Shade
- Blue to blue-green
- Shade basis
- Crystal form & particle size
- Transport
- UN 3077 · Class 9 · PG III
- HS Code
- 2827 41
Note: there is no single industry-standard definition of a blue grade. The shade is real and reproducible, but it is a manufacturing outcome of crystal form and particle size, not a separate compound or a different CAS number. Anyone quoting you a numeric color specification for blue copper oxychloride is applying their own house standard. The only reliable way to buy this is against a retained reference sample, which is how we quote it.
Where the blue shade comes from
Copper oxychloride exists in four crystal polymorphs, and they are not the same color. Shade follows form, and form follows precipitation conditions.
Why it matters: botallackite is pale bluish-green, atacamite is blackish to emerald green — so the shade you receive is a direct readout of which polymorph the precipitation produced
What the blue grade is and is not
Blue copper oxychloride technical is the same compound as the green grade — Cu₂(OH)₃Cl, CAS 1332-65-6, 56 to 59% copper as metal. What differs is appearance, and the reason is crystallography rather than composition. The compound has four known polymorphs and they differ in color: atacamite is blackish to emerald green, paratacamite a powdery light green, clinoatacamite pale green, and botallackite a pale bluish-green.
Precipitation conditions decide which form dominates, and particle size shifts the perceived shade further. So a blue grade is a genuine, reproducible manufacturing outcome — but it is a house standard, not a published specification. That distinction is the whole reason this page exists separately from the green technical grade.
How to buy a shade reliably
- Against a retained reference sample. The only dependable method. We hold a sample per lot and match the next one to it.
- With the copper assay specified separately. Shade and assay are independent variables; 56–59% Cu applies to both grades.
- With crystal form stated on the COA. Shade is a readout of form, so the form is the underlying control.
- The green grade for comparison: copper oxychloride technical.
Handling character
Copper oxychloride is a Class 9 dangerous good on aquatic toxicity grounds, shade notwithstanding. Full detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | Blue to blue-green powder |
| Shade | Matched to retained reference sample |
| Copper as Cu | 56.0–59.0% |
| Crystal form | Stated on COA |
| Moisture | Per grade specification |
| Particle size | Per agreed sieve 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 crystalline solid |
| Molecular weight | 213.57 g/mol |
| Density | 3.5 g/cm³ |
| Melting point | ≈ 250 °C |
| Water solubility | Insoluble |
| Organic solvents | Insoluble |
| Polymorph colors | Botallackite pale bluish-green; atacamite emerald green |
Physical constants compiled from public reference data for CAS 1332-65-6 and rounded for readability. Polymorph colors are as described in the mineralogical literature; commercial shade is a blend outcome rather than a single pure phase. Treat the table as orientation, not as a specification.
Where the blue shade earns its premium
Pigments and glazes, brand consistency in formulation, and colorant blending.
Pigments & ceramic glazes
Shade is the product attribute. Blue-green copper oxychloride is used as a colorant in glass, ceramics and glazes where the fired shade must repeat lot to lot.
- Matched to retained sample
- Low iron on request
- Crystal form stated on COA
Formulation brand consistency
Where a formulated product is recognized by its color on the shelf, a shade shift between lots is a brand problem, not a chemistry one.
- Shade held across the contract
- Retained sample per lot
- 50% WP also supplied
Colorant blending
Blended with other inorganic colorants where a blue-green copper base is the starting point for a target shade.
- Consistent particle size
- Shade tolerance agreed in writing
- Small trial packs available
Crop protection formulation
Chemically identical to the green grade, so it formulates the same way at the same copper loading — the choice is cosmetic.
- Same 56–59% Cu basis
- Grindability confirmed
- 35% WP also supplied
Import & compliance coordination
End use decides the import route: pesticidal use triggers FIFRA and a Notice of Arrival, pigment use does not.
- End use confirmed before quoting
- UN 3077 documentation prepared
- Broker coordination on request
Contract & scheduled supply
Shade consistency across a year of production is a contract matter, not a spot-purchase one.
- Annual contracts with call-off
- Shade reference held for the term
- Second source shade-qualified in advance
Delivered to US plants and ports
We ship blue copper oxychloride technical 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 copper oxychloride technical 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 blue copper oxychloride technical
Chelora Chemicals is a copper oxychloride supplier and sourcing partner, not a manufacturer. On a shade-specified grade the risk is not assay — it is lot-to-lot drift, and the only defense is a retained reference sample and a second source qualified against it before you need it.
We place your order with whichever qualified producer best matches your shade reference, your price point and your delivery window, and confirm the US import and FIFRA position before booking.
We will also tell you plainly when the blue grade is not worth paying for: if the end use does not expose the color, the green technical grade is the same chemistry at the same copper loading.
- Shade matched against a retained reference sample. There is no published numeric standard for blue copper oxychloride, so a physical reference is the only reliable control.
- Crystal form stated on the COA. Shade is a readout of polymorph, so the form is what actually gets controlled.
- Copper assay specified independently of shade. 56–59% Cu applies regardless of color; the two are separate variables.
- Second source shade-qualified in advance. A substitute lot that assays correctly but reads green is still a rejected lot.
- UN 3077 documentation prepared before booking. This is a Class 9 dangerous good on aquatic toxicity grounds and the paperwork is not optional.
- Honest advice on whether you need it. If the color is not visible in your end use, we will say so and quote the green grade instead.
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 unit for pigment and formulation plants.
500–1,000 kg bulk bags
Liner-fitted bulk bags for high-volume colorant and formulation blending lines.
Fiber or steel drums
Sealed drums where extra moisture protection or extended storage is needed.
Small sealed units
Smaller sealed units for shade-matching, laboratory and pilot work.
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 specifically so you can set the shade reference 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 the blue shade is produced
Copper oxychloride is made by neutralizing spent cupric chloride etching liquor from printed circuit board manufacture, or by air-oxidizing cuprous chloride in brine at 60 to 90 °C. Neither route is shade-specific in itself. The shade is decided downstream of the chemistry, in the precipitation conditions.
Four polymorphs exist and they differ in color. Botallackite, the pale bluish-green form, is the one that nucleates first under most conditions, and it later converts to atacamite or paratacamite depending on the reaction medium. Clinoatacamite is thermodynamically the most stable, atacamite next, botallackite least. A blue product therefore depends on arresting the system before full conversion, or on controlling the phase blend — which is why blue grades are a house capability rather than a commodity.
Particle size shifts perceived shade independently of phase. Finer material scatters more light and reads lighter and bluer; coarser material reads deeper and greener. That is why we specify particle size alongside the shade reference rather than treating them as separate concerns.
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.
| Chemical family | Basic copper chloride |
|---|---|
| Same CAS as green grade | 1332-65-6 — identical compound |
| Shade driver | Crystal polymorph blend |
| Bluest polymorph | Botallackite — pale bluish-green |
| Second shade driver | Particle size |
| How to specify | Retained reference sample |
The copper oxychloride range and related inorganics
The other grades in this family, plus salts and acids supplied from the same desk.
Blue copper oxychloride, answered
What is the difference between blue and green copper oxychloride?
Is there an industry standard for blue grade?
Does the blue grade perform differently as a fungicide?
Why does particle size affect the shade?
What copper content does the blue grade carry?
How do you prevent lot-to-lot shade drift?
Is copper oxychloride dangerous goods?
Can I import this into the United States?
Do you supply blue copper oxychloride in the United States?
Do you manufacture this yourself?
Get a quote on blue copper oxychloride technical
Send us your shade reference — or ask us to send trial packs so you can set one — along with your copper assay, particle size, pack size and US delivery point. We will come back with a firm quote, lead time and full documentation.