Sodium saccharin crystal is the sodium salt of saccharin, supplied under CAS 128-44-9 with the formula C7H5NNaO3S and a molecular weight of 206.17. It arrives as a white crystalline solid of ≥99% content, in two separate lines: an electroplating grade that goes into brightener packages for zinc and nickel plating baths, and a food grade that serves as the E954 sweetener.
Most of the volume we ship goes into tanks. This is one of the electroplating chemicals our customers reorder most steadily, because a single material covers acid zinc and nickel systems and the crystals dissolve evenly, so brightener strength in the bath does not drift through a shift.
Buyers come from three directions: plating shops that compound their own brightener systems, distributors building a stock range, and food or pharmaceutical manufacturers buying the sweetener grade. Grade, mesh cut and packing are decided per order, so the specification that applies to your delivery is the one confirmed at quotation — not whatever a stock description happens to say.
| Chemical name | Sodium saccharin crystal |
| CAS No. | 128-44-9 |
| Molecular formula | C7H5NNaO3S |
| Molecular weight | 206.17 |
| Assay | 99 ~ 101% |
| Content | ≥ 99% |
| Mesh size | 8-12, 10-20, 20-40, 40-80 mesh |
| Loss on drying | ≤ 15% |
| pH value | 4.5 ~ 5.5 |
| Benzoic acid salts and salicylic acid salts | Pass the test |
| As | ≤ 2 ppm |
| Pb | ≤ 2 ppm |
| Product grade | Electroplating grade, food grade |
| Net weight | 25 kg/package |
In a bath, sodium saccharin works as a brightener and leveling component rather than as a source of metal. Nickel plating is where most of it goes: it is the familiar secondary brightener that refines the grain of the deposit and pulls the surface flat. The same behaviour is what a bright nickel plating line is buying, and what zinc and alloy systems want where the finish has to read as uniform and reflective.
Its practical value comes from how it behaves in the tank. The crystals dissolve evenly, so the concentration you set at make-up is the concentration the work sees an hour later. The impurity limits in the specification — arsenic and lead at 2 ppm or below — keep the trace contamination that causes pitting and dull patches out of the bath. And because the deposit comes off bright rather than hazy, the plating process ends at the rinse instead of at a polishing wheel.
It will not rescue a bath that is out of balance. Saccharin is one component of a brightener package, and the addition level that suits your tank depends on the electrolyte, the current density and the other additives in your formulation; we do not publish a single figure, because a figure that is right for one line is wrong for the next. Send us your bath make-up and we will tell you where this material fits in it.
The food grade is a different commercial line from the tank material, even though the chemistry starts from the same CAS number. As E954 it is used as a sugar substitute: beverages and liquid concentrates, tablet coating and oral preparations, and baked goods, where it holds up at process temperatures up to 150 °C.
Buyers in this line care about two things — a consistent assay and paperwork that satisfies their own market. Every delivery carries its batch number, and the specification sheet gives your quality team the assay, moisture and impurity figures to check against your incoming standard. If your market needs a particular declaration or an additional document, say so before the order is confirmed, and we will tell you what can be issued with the batch rather than after it has shipped.
Keep the food grade on its own storage line, away from the bags and drums that go to the plating shop. The two lines are packed and traced separately for exactly that reason.
Four things make this material easy to justify on a cost sheet. The deposit comes off bright, so polishing, buffing and the rework that follows them fall away. The impurity ceiling is low enough that the bath is not being slowly poisoned by the brightener itself. The crystals dissolve at an even rate, so one morning addition holds its strength across the shift. And the material adds no cyanide and no heavy metal to the tank, which keeps the rinse water and the waste treatment on the simple side of what an electroplating line has to declare.
There is also a stock argument. Our acid zinc plating chemicals range is built around carriers and brighteners, and this saccharin sits in that range as the brightening component; the same material is what a bright nickel plating line draws on, and what zinc nickel plating baths use alongside their own additives. One bag covers three lines, and one reorder point replaces three.
Finally, the assay window is narrow — 99 to 101%. That is what makes the addition calculable. When the strength is stable batch to batch, the brightener addition can be treated as a number rather than a judgement call, and the night shift can repeat exactly what the day shift did.
Sodium saccharin crystal keeps well. Sealed and stored in a cool, dry place at room temperature, the shelf life is 24 months, and the material is stable enough that an untouched bag at the back of the store is still usable at the end of that window. Close the bag properly between uses: the crystals pick up moisture, and moisture shows up directly in the loss on drying figure on the certificate.
Weighing out is the part that needs a little discipline. It is a fine crystalline powder, so open bags away from draughts, wear a dust mask and eye protection, and deal with spills before they are walked through the plant. Because it is freely water soluble, a spill is rinsed away rather than swept dry — but sweep the bulk first, since a wet film of this material on a tiled floor is slippery.
Store it apart from strong oxidisers, and keep the food grade on its own shelf away from plating-side chemicals. The safety data sheet carries the handling and transport wording your carrier and your EHS officer will ask for; request it when you place the order so the paperwork is ready when the vehicle is.
The product undergoes rigorous testing to meet REACH and FDA guidelines, giving buyers a documented basis for use in both food and industrial contexts. It is non-toxic and non-reactive, which supports operator safety on the line and helps plants keep to their environmental standards. Its dual-use certification for food and industrial applications reflects how widely the material can be deployed across sectors.
Fengfan Sodium Saccharin Crystal is built to lift the performance of electroplating chemical baths: it reduces energy consumption and enhances metal deposition rates, so more metal is laid down per unit of power. The brightening effect also removes the need for secondary polishing, taking a step out of the workflow and cutting production costs by up to 15%. Actual figures vary with bath chemistry and line configuration, so confirm the expected gain with your process team.
Choosing the right match is where most sourcing decisions stall. As a trading supplier, we keep one point of contact from first enquiry to after-sales: tell us what you are making and the conditions you work under, and we shortlist the closest matches from our supplier network, compare specifications and arrange samples before you commit to a bulk order. If something does not behave as expected, we work with the supplying partner on the cause and a practical fix, and stay with the case until it is settled. Email, WeChat or WhatsApp enquiries get a reply within 24 hours.
Yes. Saccharin sodium, sodium saccharine and o-sulfobenzoic acid imide sodium salt are all names for the same product. Use CAS 128-44-9 and the formula C7H5NNaO3S as the identification on a purchase order, because trade names vary between suppliers while the CAS number does not.
No. Potassium pyrophosphate is a complexing and buffering salt, while sodium saccharin is a brightener and leveling component — they do different jobs and one cannot stand in for the other. They are often used in the same zinc or nickel bath, so the practical question is where each one sits in the formulation, not which one to drop.
Most shops dissolve it into a stock solution first, because the crystals are freely soluble in water (around 1 g in 1.5 mL) and a solution can be measured accurately. Add it under circulation rather than tipping crystals into a still tank, and keep the method the same through the plating process so the brightener level stays steady. The addition level itself belongs to your formulation — send us the make-up and we will advise on it.
The chemistry is the same salt, but the food grade is packed, labelled and documented for food use. For tank additions, order the electroplating grade so the paperwork that arrives with the goods matches the way the material is being used — that matters when your own customer audits the line.
The four standard cuts cover most orders. If you need a different cut, or a blend for a dry brightener package, raise it at enquiry and we will confirm what can be arranged for your quantity before anything is committed.
The food grade is supplied as the E954 sweetener and is used in beverages, tablet coating and baked goods. Whether it suits your specific application depends on the documentation your market requires, so tell us the destination and the declaration you need before the order is confirmed, and we will confirm what can be issued with the batch.
