zinc sulfate (CAS 7733-02-0): Sourcing & QC Notes from a Fertilizers Perspective
When people talk about Fertilizers; Hot Products; Fine Chemicals; Antioxidants; Nutrition Enhancers; Food Processing Aids, zinc sulfate (CAS 7733-02-0) comes up almost every time. In our sourcing and QC work the question is rarely “what's the assay” — it's “how do I actually use it in my system”. This page walks through that from a practical angle.
Basic specifications
| Name | zinc sulfate |
|---|---|
| English name | zinc sulfate |
| CAS No. | 7733-02-0 |
| Formula | ZnSO4 |
| Molecular weight | 161.4 |
| Applications | Fertilizers; Hot Products; Fine Chemicals; Antioxidants; Nutrition Enhancers; Food Processing Aids |
| Standard purity | per batch COA |
| Packaging | confirmed per order |
| Storage | keep sealed in a cool, dry place |
Figures above are published / typical information; final values follow the batch COA and order confirmation.
What it does in the system
In Fertilizers; Hot Products; Fine Chemicals; Antioxidants; Nutrition Enhancers; Food Processing Aids, the first split for zinc sulfate (CAS 7733-02-0) is 'industrial grade' vs 'food / feed grade' — they are not interchangeable. Food and feed grades carry stricter statutory limits on heavy metals, arsenic, microbes and residues, usually backed by corresponding licences and test reports. Regulatory grade and traceability come before the assay figure. Comparable grades:
- Zinc ammonium sulfate (CAS 7783-24-6)：a comparable grade often evaluated alongside。
- zinc sulphite (CAS 13597-44-9)：a comparable grade often evaluated alongside。
- Zinc Sulfate Monohydrate (CAS 7446-19-7)：a comparable grade often evaluated alongside。
How to get the choice right
- Confirm the required grade (food / feed / industrial) — never substitute industrial for food or feed use.
- Request and verify test reports for heavy metals, arsenic, microbes and residual solvents against the applicable standard or customer spec.
- Mind moisture-proof, contamination-free packaging and transport to avoid drift on arrival.
- Retain samples of critical lots and keep incoming-inspection records for traceability and retest.
Mistakes people make
Using industrial grade in place of food / feed grade: statutory limits differ and mixing them triggers compliance and safety risk.
Watching assay but ignoring traceability: without the correct grade's test report, even high purity cannot enter the food / feed chain.
Loose storage and transport: moisture or cross-contamination can make a compliant lot fail on arrival.
Questions we often get
Where is zinc sulfate used in Fertilizers; Hot Products; Fine Chemicals; Antioxidants; Nutrition Enhancers; Food Processing Aids?
As a common raw material it serves nutritional fortification, stabilisation or process aid; the exact use depends on the finished product and regulatory grade.
Which grade and documents should I confirm when sourcing zinc sulfate?
State food / feed grade requirements and verify safety indicators (heavy metals, microbes) test reports against the applicable standard or customer spec.
Can industrial grade be used as food / feed grade?
No. Products here are supplied for industrial and research use; food or feed use requires the correct grade with full compliance documentation.
Further reading
- zinc sulphite (CAS 13597-44-9)
- Zinc Sulfate Monohydrate (CAS 7446-19-7)
- Zinc sulfate Heptahydrate (CAS 7446-20-0)
- Zinc methionine sulfate (CAS 56329-42-1)
- Zinc sulfite dihydrate (CAS 7488-52-0)
See site search for 硫酸锌 or browse the Organic Chemicals directory.
About supply & documents
Jinan Shenghe Chemical Co., Ltd. supplies chemical raw materials and fine chemicals; a COA ships with every batch, with MSDS and technical data sheets available on request. In your enquiry include product name, CAS, target purity and packaging, and we will provide documents and a quote to the relevant standard.
Contact: info@591daili.com | +86-18553102138
Note: This page is for industrial raw-material technical discussion only. Products are supplied for industrial and research use, not for consumer or medical use. Drinking-water, food, cosmetic or pharmaceutical applications must meet applicable regulations and customer standards; specifications, compliance documents and transport requirements follow the batch COA and order confirmation.