Global buyers need more than a low Zinc Nitrate price. They need consistent purity, dependable documentation, and practical delivery support. According to the U.S. Geological Survey’s Mineral Commodity Summaries 2025, global zinc mine production reached approximately 12 million metric tons in 2024. This large upstream base supports industrial zinc chemicals, including Zinc Nitrate, but raw-material availability does not guarantee product consistency.
Quality begins with controlled manufacturing. A reliable supplier should provide batch-specific certificates of analysis, clear zinc and nitrate specifications, moisture data, packaging details, and current safety documentation. For agricultural, laboratory, and industrial applications, small differences in concentration can affect dosing, solubility, and storage performance. The International Zinc Association also emphasizes zinc’s essential role in plant, animal, and human nutrition. Plant nutrition expert Ross M. Welch stated, “Zinc is an essential micronutrient for plants, animals, and humans.” Buyers should still verify every technical claim against independent test results.
Details matter. A sealed bag, legible batch code, and dry warehouse can prevent expensive problems. However, the market is not perfectly transparent. Some supplier pages provide impressive specifications but limited evidence. That weakness deserves attention. China’s strongest Zinc Nitrate suppliers combine production experience, laboratory testing, traceable sourcing, export knowledge, and responsive communication. Global buyers should compare more than price. They should examine consistency across batches, lead times, loading practices, and after-sales support. This approach cannot remove every supply risk, but it creates a more defensible purchasing decision.
Zinc nitrate, CAS 7779-88-6, is an inorganic salt used in laboratory reagents, surface treatment, catalysts, and specialty chemical production. Its anhydrous formula is Zn(NO₃)₂, with a molar mass of 189.40 g/mol. Many commercial materials are supplied as zinc nitrate hexahydrate, which has a different molar mass of 297.49 g/mol. This distinction matters. A buyer who compares prices without checking hydration status may misjudge the actual zinc content.
The USGS Mineral Commodity Summaries 2025 reported approximately 12 million metric tons of global zinc mine production in 2024. That figure shows the scale of the upstream market, but it does not guarantee consistent nitrate quality. Experienced buyers should request a current certificate of analysis, production date, assay, moisture, insoluble matter, and packaging details. Zinc nitrate is hygroscopic and should remain sealed, dry, and protected from contamination. Supplier evaluations should also review batch traceability and export documentation.
Tips: Confirm whether the quotation covers anhydrous or hydrated material. Check the formula before calculating dosage. Small wording differences can change the specification. I would also verify the test method, because reported purity is not always directly comparable.
Zinc nitrate is supplied mainly in anhydrous and hexahydrate forms. Anhydrous zinc nitrate has a molecular weight of 189.39 g/mol. Hexahydrate contains six water molecules and weighs 297.49 g/mol. Both grades commonly reach 98% typical purity, but their handling and dosing requirements differ. The hexahydrate appears as clear or white crystals and dissolves quickly in water. Anhydrous material supports more concentrated formulations, yet it demands tighter moisture control.
The U.S. Geological Survey’s Mineral Commodity Summaries 2024 reported global mined zinc production of about 12.3 million metric tons in 2023. This large upstream base supports international zinc chemical supply, but it does not guarantee consistent nitrate quality. Buyers should request a recent certificate of analysis, batch number, moisture result, and insoluble matter data. In practice, packaging condition matters. A damp inner liner can change the usable concentration before the material reaches production. This is easy to overlook.
Tips: Match the grade to your formula’s water balance. Compare purity on the same basis, preferably as received. Confirm molecular form before calculating dosage. A 98% result alone may not reveal storage history, particle condition, or lot-to-lot variation. Suppliers should also provide samples for dissolution testing and retain traceable production records. Some specifications still need improvement.
China Best Zinc Nitrate Supplier for Global Buyers
Reliable zinc nitrate begins with controlled crystallization, not a low quotation. Production teams should manage solution concentration, cooling speed, seeding, and mother-liquor separation. These variables influence crystal size, purity, and caking during transport. Small crystals matter. Oversized crystals may dissolve slowly in downstream applications.
Drying requires equal discipline. Excessive heat can create uneven moisture profiles and discoloration. Controlled airflow, verified temperature sensors, and final moisture testing provide stronger evidence than appearance alone. Each batch should include assay, moisture, insoluble matter, packaging date, and operator records. ISO 9001:2015 supports documented process control, while the ISO Survey 2022 recorded 1,265,216 certified organizations worldwide. Certification helps, but it does not replace technical verification.
Traceability should connect raw materials, equipment settings, laboratory results, and shipment samples through one batch code. USGS Mineral Commodity Summaries 2024 estimated global zinc mine production at about 12.0 million metric tons in 2023, showing the scale of the upstream market. However, zinc availability does not prove zinc nitrate consistency. Buyers should request retained samples, calibrated test records, and corrective-action reports. A clean certificate is useful. It is not the whole story. In practice, even well-designed controls can fail when sampling is rushed or records are copied. That weakness deserves honest review before long-term supply approval.
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Quality verification should begin with a complete, lot-specific certificate of analysis. Do not rely on a generic product sheet. Assay confirms the material’s overall chemical purity. Zinc content shows whether the expected zinc level is present. These results should use clear methods, units, and acceptance limits. A qualified laboratory should test representative samples from each production lot.
Moisture deserves close attention during purchasing and transport. Excess water can change concentration, increase caking, and affect weighing accuracy. Chloride testing helps identify unwanted inorganic residues. Heavy metal analysis should cover relevant elements, such as lead, cadmium, mercury, and arsenic. Limits must match the buyer’s destination requirements and intended application. Ask for test dates, sample identification, and traceable laboratory records.
A clean certificate is useful, but it is not proof by itself. Sampling errors can hide variation inside one batch. That part is often overlooked. Buyers should compare certificates with independent inspection results when the shipment is important. Packaging condition also matters. Damp bags, broken seals, or unclear labels can weaken confidence before testing begins. Keep retained samples for later review. Results may differ slightly between laboratories, so methods and detection limits should be checked carefully. Reliable supply depends on transparent data, repeatable testing, and the willingness to question results that look unusually perfect.
| Quality Parameter | Typical Acceptance Criteria | Illustrative Reference Result | Recommended Test Method | Status |
|---|---|---|---|---|
| Product Identity and Physical Properties | ||||
| Product form | White to colorless crystalline solid | White crystalline solid | Visual examination under normal laboratory lighting | Conforms |
| Chemical name | Zinc nitrate hexahydrate | Zinc nitrate hexahydrate | Identity confirmation by certificate review and laboratory analysis | Conforms |
| CAS Registry Number | 10196-18-6 | 10196-18-6 | Reference to recognized chemical substance databases | Verified |
| Molecular formula | Zn(NO3)2·6H2O | Zn(NO3)2·6H2O | Stoichiometric identity review | Conforms |
| Molecular weight | 297.49 g/mol, calculated for the hexahydrate | 297.49 g/mol | Calculation from internationally accepted atomic weights | Conforms |
| Solubility in water | Freely soluble at ambient temperature | Freely soluble; clear solution observed | Visual evaluation after dissolution in deionized water | Conforms |
| Chemical Quality Verification | ||||
| Assay, zinc nitrate hexahydrate | 98.0–100.5% on an as-received basis | 99.2% | Complexometric titration with standardized EDTA, or an equivalent validated method | Pass |
| Zinc content | 21.0–22.2% by mass | 21.8% | ICP-OES, AAS, or calculation from validated zinc assay | Pass |
| Moisture / loss on drying | 35.5–37.5% for the hexahydrate form | 36.3% | Gravimetric loss on drying, typically at 105°C with controlled exposure time | Pass |
| Chloride (Cl−) | ≤0.010% (≤100 mg/kg) | 0.003% (30 mg/kg) | Ion chromatography or argentometric/turbidimetric chloride determination | Pass |
| Sulfate (SO42−) | ≤0.020% (≤200 mg/kg) | 0.006% (60 mg/kg) | Ion chromatography or validated gravimetric/turbidimetric method | Pass |
| Iron (Fe) | ≤0.005% (≤50 mg/kg) | 0.0012% (12 mg/kg) | ICP-OES or AAS | Pass |
| Water-insoluble matter | ≤0.010% (≤100 mg/kg) | 0.004% (40 mg/kg) | Filtration, drying, and gravimetric determination | Pass |
| Heavy Metals and Trace Elements | ||||
| Lead (Pb) | ≤10 mg/kg (ppm) | 0.42 mg/kg | ICP-MS or ICP-OES after acid digestion | Pass |
| Cadmium (Cd) | ≤5 mg/kg (ppm) | 0.08 mg/kg | ICP-MS or ICP-OES after acid digestion | Pass |
| Arsenic (As) | ≤3 mg/kg (ppm) | 0.16 mg/kg | ICP-MS, ICP-OES, or hydride-generation AAS | Pass |
| Mercury (Hg) | ≤1 mg/kg (ppm) | <0.01 mg/kg | Cold-vapor AAS, atomic fluorescence, or ICP-MS | Pass |
| Nickel (Ni) | ≤10 mg/kg (ppm) | 0.31 mg/kg | ICP-MS or ICP-OES after acid digestion | Pass |
| Packaging and Documentation Controls | ||||
| Sampling plan | Representative sampling from multiple containers in the production lot | Composite sample prepared from randomly selected containers | Documented sampling plan based on lot size and intended use | Verified |
| Certificate of analysis | Must include lot number, test date, methods, results, and authorized approval | Required before shipment | Document review and cross-check against the tested lot | Required |
| Packaging condition | Sealed, moisture-resistant packaging with intact labeling | Sealed moisture-resistant inner liner and labeled outer package | Visual inspection before dispatch | Conforms |
| Reference note: The acceptance criteria and illustrative results above are presented for buyer-side quality verification of zinc nitrate hexahydrate. Actual release specifications should be confirmed against the applicable contract, destination-market regulations, and an independent laboratory report for the specific lot. | ||||
China Best Zinc Nitrate Supplier for Global Buyers
Global sourcing starts with a clear purchasing brief. State the required grade, assay, moisture limit, and intended application. Minimum order quantities often vary by purity and packaging. A trial order may begin at 500 kilograms, while full-container purchases can reduce unit costs. Confirm production capacity before negotiating price.
HS classification deserves careful checking. Zinc nitrate may require different codes based on composition, hydrate form, and local customs interpretation. Ask for the SDS, specification sheet, certificate of analysis, and proposed HS code. Let an experienced customs broker verify the final declaration. A supplier’s suggestion is useful, but it is not always decisive. That detail is easy to underestimate.
Tips: Compare FOB, CIF, and DAP quotations on the same shipment size. Confirm who handles insurance, export clearance, destination charges, and unloading. Packaging should match the route, climate, and warehouse conditions. Common options include sealed bags, fiber drums, or moisture-resistant outer packaging. Request photos before dispatch. Lead time may range from seven to twenty days after payment and artwork approval, but holidays, testing, and port congestion can change it. Build a small buffer. It feels inefficient, yet it prevents rushed purchasing decisions.
Zinc nitrate is an inorganic salt used in laboratories, surface treatment, catalysts, and specialty chemical production. Its anhydrous formula is Zn(NO₃)₂. The CAS number is 7779-88-6.
The two common forms are anhydrous zinc nitrate and zinc nitrate hexahydrate. Anhydrous zinc nitrate has a molar mass near 189.40 g/mol. Hexahydrate contains six water molecules and weighs about 297.49 g/mol.
Hydration changes the material’s weight, water content, and dosing calculation. Comparing prices without checking the form can create a misleading result. The label should clearly state anhydrous or hexahydrate.
Both forms commonly reach about 98% typical purity. However, purity alone does not show moisture, insoluble matter, or storage history. A 98% result may still need closer review.
Request a current, lot-specific certificate of analysis. It should include assay, zinc content, moisture, insoluble matter, chloride, and relevant heavy metals. Batch numbers and test dates should also appear.
Keep it sealed, dry, and protected from contamination. Zinc nitrate is hygroscopic and can absorb moisture from the air. Damp inner liners may cause caking and change usable concentration.
Compare the certificate with independent inspection results when the shipment is important. Check sampling methods, laboratory methods, units, and detection limits. Keep a retained sample for later review.
No. Large upstream zinc production indicates market scale, not consistent nitrate quality. Each lot still needs traceable testing and careful packaging checks. I would not rely on market volume alone.
Zinc Nitrate, identified by CAS 7779-88-6 and the formula Zn(NO₃)₂, is an important inorganic chemical available in anhydrous and hexahydrate forms. With a molar mass of 189.40 g/mol and typical purity of 98%, it is selected according to application requirements, handling conditions, and storage needs. Reliable production generally includes controlled crystallization, efficient drying, and complete batch traceability to support consistent quality and dependable supply.
For global buyers, quality verification should cover assay, zinc content, moisture, chloride, and heavy-metal levels. A practical sourcing plan should also confirm the minimum order quantity, applicable HS classification, packaging format, Incoterms, and expected lead time before placing an order. Reviewing technical documents, inspection records, and shipment requirements in advance can help buyers compare suppliers efficiently and reduce delays in international procurement.