Sulfamic acid (CAS 5329-14-6) is a simple product on the surface — a white crystalline powder — but buying it well means checking the right specifications and documentation. This purchasing guide covers the specification sheet, the COA, packaging and storage, and the supplier checklist for sulfamic acid.
1. Reading the Sulfamic Acid Specification
| Parameter | Typical value | Why it matters |
|---|---|---|
| Assay | 99.5% min (technical grade) | Effective acid content |
| Sulfate (as H2SO4) | Low (<0.5%) | Impurity; affects some applications |
| Water | Low (<0.2%) | Prevents caking, keeps assay |
| Iron | Low | Matters for sensitive uses |
| Appearance | White crystalline powder | Visual QC |
2. What a Complete COA Should Contain
- Product name and CAS number (5329-14-6)
- Batch number and production date
- Assay (measured)
- Sulfate, water, iron (measured)
- Appearance
- Test methods and quality manager signature
3. Packaging, Storage and Shelf Life
- Packaging: typically 25 kg bags, or bulk; some grades in FIBC.
- Storage: dry, sealed, cool; moisture causes caking. Keep away from strong oxidizers and bases.
- Shelf life: typically 24 months when stored dry.
- Handling: dust is irritating — use dust protection, gloves and goggles.
4. MOQ, Lead Time and Logistics
- MOQ: from trial bags to container loads.
- Documents: invoice, packing list, COA, MSDS, certificate of origin.
- Shipping: sulfamic acid is generally not classified as a dangerous good in solid form, but confirm the SDS and classification with your forwarder.
5. How to Verify Quality on Arrival
- Check bag integrity and labels against the COA batch number.
- Visual check: white, free-flowing crystals, no caking or discoloration.
- Verify assay with a simple titration if possible.
- Run a small application test (e.g. descaling coupon) against your current batch.
- Keep a retained sample per batch.
6. Supplier Checklist
- Manufacturer vs trader — manufacturers control assay and impurity levels.
- Consistent COA with measured assay/sulfate/water/iron on every batch.
- Stable supply and reasonable lead time.
- Export documentation quality.
- Price comparison on a per-kg basis with the right grade specification.
7. FAQ
What assay of sulfamic acid should I buy?
Technical grade is typically 99.5% min; for sensitive applications (e.g. sweetener intermediate) confirm higher purity and low heavy metals on the COA.
Is sulfamic acid a dangerous good?
Solid sulfamic acid is generally not classified as a dangerous good for transport, but its solutions are acidic — confirm the SDS and shipping classification.
Why does sulfamic acid cake in storage?
Moisture pickup causes caking. Store sealed in a dry place and check water content on the COA.
Can I get a trial sample?
Yes. PolyblueChem offers trial samples so you can validate the product before bulk orders.
8. References and Further Reading
- Standard methods for sulfamic acid assay
- Manufacturer SDS and COA guidance
This article is published for industrial and technical reference by PolyblueChem. Specifications are typical industry values; always verify against the supplier’s COA.
PolyblueChem supplies sulfamic acid (CAS 5329-14-6) with full COA and MSDS. See our sulfamic acid guide. Contact us for samples and quotations.