Fengfan CAS 30290-53-0 Progargyl-3-Sulfopropyl Na Salt POPS

Product Overview

POPS is the sodium salt of propargyl-3-sulfopropyl ether, supplied as an orange-yellow to orange-red aqueous solution at an assay of about 45%. It is an intermediate used by bright nickel plating services rather than a finished brightener: formulators build it into a brightener package to control how nickel deposits in the quiet, low-current-density parts of the workload — the inside of a recess, the shielded face behind a bracket, the end of a rack furthest from the anode.

On its own it does little. Paired with the right components it decides whether those areas come out bright or hazy. In a working bath it is dosed together with PPS or PPS-OH, which carry the middle and the top of the current density range, and the balance is easier to hold again when PS is part of the package. The same leveling behaviour carries into electroless nickel plating, where the benefit is a more even build of deposit across complex geometry.

Key Advantages

• Aimed at the weak-current end. The product is chosen for the low-current-density region of the work in electroplating, which is where a standard brightener package leaves recessed or shielded faces dull first.
• Paired, not substituted. PPS or PPS-OH stay in the package for the mid and high current densities; this component finishes the low end. Swapping one for the other changes the shape of the deposit, not just its gloss.
• Liquid, so it doses by volume. Being an aqueous solution, it can be measured and fed through the bath's dosing or circulation point without a separate dissolving step.
• Stable in the acidic window. Its own pH falls in the acidic range a bright nickel plating process already runs in, so it is not fighting the bath before it has done any work.
• Low addition rates. It is used in small amounts relative to the base brightener, so consumption follows the line's ampere-hours more closely than its litres of make-up.
• No formulation overhaul. It slots into existing bright nickel and electroless nickel plating chemicals: you adjust a ratio rather than rebuild the system around a new additive.

Specifications

Low-Current-Density Leveling

In electroplating, current density falls off wherever the geometry gets in the way. A recess, a blind hole, the back face of a part on a rack, the last few centimetres of a long component: each of them sees a fraction of the current the exposed faces see, and each of them is where a bright nickel deposit loses its gloss first. That weak-current region is what this leveler is aimed at.

The product changes how the deposit builds in that part of the plating process, so recessed faces keep pace with exposed ones instead of lagging behind. It is not a stand-alone brightener. Balanced against PPS or PPS-OH — which work the middle and the top of the range — it lets you pull one end of the deposit without disturbing the other.

Operators usually judge it on a Hull cell panel rather than on finished parts, because the panel shows the whole current density range at once. Read the low-current end: that is where a shortage of this component appears first. Adjust in small steps and re-panel after each one; the low-current end responds quickly enough that a single large correction is rarely the right move.

Use Scenarios

• Connectors and stamped contacts. Fine features and tight pitches leave very little current in the gaps between contacts; the leveler keeps those faces bright so the parts do not need sorting after the plating process.
• Automotive fasteners and brackets. Deep recesses and blind holes are the classic low-current-density case. Racked in a bright nickel line, they come out even without extra polishing.
• Aerospace and functional nickel layers. Where the coating is judged on uniformity across complex geometry rather than on mirror gloss, the leveler evens out thickness on shielded faces.
• Aluminum components. In electroless nickel plating chemicals used on aluminum, the additive helps machined faces, pockets and edges build a more even deposit.
• Wire, strip and small parts. Long thin work has a very uneven current distribution along its length; a leveler that works at low current helps the far end keep up with the near end.
• Brightener formulators. If you build your own packages rather than buying a finished one, this is one of the components you keep on the shelf to tune the low-current-density response.
• Plating job shops. Shops that sell nickel plating services across a wide spread of customer parts keep one low-current-density leveler in stock so a new geometry does not mean a new additive.

Combining With PPS and PPS-OH

Bright nickel plating services build their systems in layers, and this product sits in the leveling layer. The usual arrangement is PPS or PPS-OH for the stronger action at the middle and top of the current density range, this additive for the low end, and PS where the package needs extra response. The three are complementary rather than interchangeable.

Match the grade as well as the name when you move a formulation across. PPS is supplied as a crystalline powder; PPS-OH comes as a liquid and as a solid, and the two forms are not dosed the same way. Confirm which grade your package is built on before you change a ratio, and check the concentration against the figure your formulation was written to.

Outside electroplated nickel, the product is also used in electroless nickel plating on aluminum, where there is no current distribution to correct and the benefit is a more even build of deposit across machined faces and pockets. In both cases it is one component of the package, not a replacement for the rate and stability controls around it.

Dosing and Bath Control

1. Confirm where the low-current-density component in your current package comes from and at what ratio it runs, before you introduce a second leveler.
2. Start at the lower end of the working range and add through the bath's circulation or dosing point, so the component disperses before the next rack goes in.
3. Pull a Hull cell panel at the bath's normal operating current before and after the first addition, and keep both panels as the reference for that bath.
4. Log the addition against ampere-hours. The consumption figure for the product is a planning number; your own log is what tells you when the next top-up is due.
5. Re-panel the low-current end after each top-up instead of waiting for parts to show a problem on the rack.
6. Write the batch number of every drum you charge into the bath log, so a later change in behaviour can be matched to a lot.

Packing, Ordering and Delivery

• Packing. This product ships in a 25 kg security plastic drum. Across our range the options are 10 kg/box, 25 kg or 50 kg/bag, 20 kg/25 kg/30 kg/200 kg/drum and 1,000 kg/IBC drum; confirm the format for your order with your sales contact.
• Minimum order quantity. Varies by chemical and is confirmed with our sales team per order.
• Lead time. Production lead time is 2 weeks.
• Payment. 100% T/T in advance.
• Shipping. Per the terms agreed in the current contract.
• After delivery. An inspection certificate is issued after delivery stating the batch number and the warranty period.
• Samples. Ask your sales contact about sample availability and the smallest pack you can start from before committing to a full drum.
• What the product is not. It is supplied as a single intermediate for nickel plating, not as a blended brightener and not as a ready-to-use electroless nickel plating chemicals package; the formulation work stays with your own bath.

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Technical Support & Model Matching

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.

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