Quality
How every lot is tested and released.
The parameters, the methods, the limits, and the ways you can check our results before you rely on them.
Batch release
What is tested on every lot.
Each lot is tested against the specification and released with a certificate of analysis that carries the batch number, manufacturing and expiry dates and the result and method for every parameter.
| Parameter | Specification · method |
|---|---|
| Appearance | Colourless to white crystals · visual |
| Assay (as Ca(NO₃)₂·4H₂O) | 99–103% · titrimetric |
| Melting point | 42–44 °C · capillary tube |
| pH (5% solution, 25 °C) | 5.0–7.0 · pH meter |
| Insoluble matter in water | 0.005% max · gravimetric |
| Nitrite | 0.001% max · colorimetric |
| Chloride and sulphate | 0.005% max each · turbidimetric |
| Barium, iron, lead | 0.01% / 0.0005% / 0.001% max · ICP-OES |
| Magnesium, potassium, sodium, strontium | 0.05% / 0.005% / 0.02% / 0.05% max · ICP-OES and flame photometry |
The sample COA is for batch HRSU/CNP/04/42/2025 (assay 99.8%). Batch results on a real order are on that order’s own COA.
Checking us
How you can verify the result.
Ask for a sample
Samples are available. Test them in your own laboratory against the COA before you commit to a container.
Independent inspection
You are welcome to appoint an independent inspection company, for example SGS, Bureau Veritas or Intertek, to sample and inspect before shipment, at your cost. We will give them access.
Compare to the COA
Every lot ships with its COA. If a result on your own test differs, send us both reports and we will review them together.
Pay by letter of credit
Payment is by T/T or LC. An LC lets your bank release payment only against the documents you specified.
Plainly stated
What we do not claim.
We do not hold an ISO 9001 certificate. We do not hold REACH, TSCA or AICIS registrations; the importer deals with those, and we will tell you what we can supply to help. Our testing is our own, so we encourage the sample and inspection steps above. We would rather you verify us than trust us.
Request a quote
Get price, lead time and a sample COA.
Tell us what you need. We reply within one business day.