Fengfan CAS 4079-68-9 Electroplating Intermediates 1-Diethylamino-2-Propyne DEP

Product Overview

DEP is 1-diethylamino-2-propyne, a low-molecular-weight alkynyl amine supplied as a clear, colourless to yellowish liquid. In the bath it works as a top brightener and a strong leveling agent: it is the component a plater reaches for when the deposit is bright enough but still traces polishing lines, light orange peel or a faint haze. We supply it as an intermediate for nickel plating, so it is bought both by plating shops that offer nickel plating services and build their own brightener packages, and by formulators who make additives for other plants.

Most electroplating shops keep the volume components — carriers, wetting agents, base brighteners — on one replenishment schedule and the trace additives on another. This product belongs firmly in the second group: small, frequent, measured additions rather than drum quantities tipped into the tank.

If you are mapping a metal plating process from the base brightener upward, DEP is the leveling end of that map. It changes the finish and the surface profile; it does not replace a carrier, a wetting agent or a base brightener, and expecting it to do their work is the most common way a nickel bath drifts out of balance.

Specifications

Brightening & Leveling Performance

• Strong leveling, not just shine. DEP is classed as a stronger leveling agent: it evens out the micro-profile left by polishing and machining, so the nickel covers the substrate's marks instead of tracing them into the finished surface.
• Top brightener for the high-current end. In bright nickel plating it is used as a top brightener alongside the secondary brighteners, sharpening brilliance where current density is highest — a current-driven effect that has no equivalent in electroless nickel plating.
• Where the effect appears first. In electro nickel plating the change shows up in the high-current-density areas; dullness at the low-current-density end usually belongs to a different component and should be chased there before the leveler is increased.
• A trace dose does the work. Because the material is active at very low concentration, the difference between right and too much is a few milligrams per litre — the reason it is handled as a diluted addition rather than a bulk component.
• It pairs with polymer levelers. Where a PPS- or PPSOH-type polymer carries the main leveling, DEP trims the finish; where the polymer alone leaves a faint haze, a small addition of this product is where formulators usually look next.
• Overdose reads as a process problem. A strong leveler pushed past its window is a common source of haziness and brittleness; when the plating process starts drifting after an addition, a test panel tells you whether the leveler is the cause.
• Batch identity can be checked at the drum. Assay and refractive index are both specified for this grade, so an incoming drum can be compared against the specification before it reaches the line.

Addition & Consumption Control

1. Dilute before you dose. Weigh the concentrate into a clean container of water and add the diluted solution under circulation. At this concentration level, tipping concentrate straight into a production tank overshoots the local concentration at the point of entry, and that is where streaks begin.
2. Start at the bottom of the addition range. Begin low and walk upward across successive test panels; the low-current-density area usually tells you when the addition is sufficient.
3. Read a panel, not a calendar. A Hull cell panel plated from the working nickel plating bath shows whether the leveler is short or in excess faster than any titration, and it costs minutes of line time.
4. Replenish on ampere-hours. Consumption is quoted per KAH, so keep a running charge log and add the leveler in proportion to the ampere-hours the electro nickel plating line has run, not to the number of parts plated; electroless nickel plating has no ampere-hour figure to work from.
5. Rebuild after purification. Carbon treatment and peroxide kills strip organic additives, this leveler included; a bath that has just been purified needs its brightener and leveler package re-established before the next production run.
6. Keep a dosing sheet. Record the dilution batch, grams added, KAH since the last addition and the panel result. When a defect appears three weeks later, that sheet is what keeps the plating process readable.

Nickel Additive Pairing

• Base brightener layer. An ALS-type sodium allyl sulphonate gives the bath its overall brilliance; this leveler refines what that layer leaves behind. If the whole deposit is dull, the base layer is the first thing to check, not the leveler.
• Secondary and top brighteners. PME-, PAP- and BEO/BMP-type products occupy the same top-of-stack region. Formulators often pair one of them with DEP because brightening and leveling are different effects: the brightener lifts gloss, the leveler flattens the profile.
• Polymer levelers. PPS and PPSOH types deliver strong leveling at much larger addition levels; this product gives a finer trim from a trace dose. Running both is common in bright nickel plating where parts are polished before plating.
• Other diethylamino propyne derivatives. The sulfate (TC-DEP) and formate (PABS) versions sit in the same family but are different salts with different actives, so a dose does not transfer between them. Re-establish the addition from a panel when you switch.
• What shops offering nickel plating services tend to stock. Job shops running several nickel lines usually hold the trace leveler as a trim item and keep carriers, wetting agents and base brighteners on a separate, higher-volume schedule.
• When something drifts, check the stack in order. In any metal plating process the leveler is rarely the first thing to adjust: confirm the wetting agent, the base brightener and the bath's own analysis before changing the trace addition.

Applications

Decorative bright work. Taps, sanitary ware, door hardware, furniture fittings and costume jewellery are where a strong leveler earns its place: the blank is polished before plating, and the nickel has to hide the polishing direction rather than trace it. In that metal plating process the leveler is the component that turns a visible polish pattern into a flat, mirror-bright surface under the chrome.

Barrel and rack work. Screws, stampings, connectors and small turned parts are plated in bulk, where current density differs across every part in the load. A trace-level addition helps the outside of the barrel finish like the faces that see the anode directly — which is what most electroplating lines are actually judged on when a customer opens the box.

Plants that sell plating as a service. For a shop offering nickel plating services, repeatability across campaigns matters more than any single bright panel: at trace addition one drum goes a long way, so the batch you qualify now is the batch you will still be dosing from next quarter — provided the dilution and dose records travel with it.

Packaging & Drum Storage

1. 20 kg drum as standard. Each drum is a closed, labelled pack; check the label and batch number before the drum goes to the line.
2. Store upright and closed in a cool, dry, ventilated area, away from acids, oxidizers and direct sunlight.
3. Dispense with clean, dry equipment. Use a dedicated drum pump or a clean ladle; water left in a dipper is the usual source of contamination in a trace-addition product.
4. Reseal immediately after dispensing and keep the cap on; a part-used drum should carry its batch number until it is empty.
5. First in, first out. Rotate drums so the oldest batch is used first, and keep the batch paperwork with the drum.
6. Label the diluted working solution with its concentration and the date it was made, and discard the remainder rather than returning it to the drum.

Ordering & Delivery

• Payment: 100% T/T in advance.
• Minimum order quantity: varies by chemical and is confirmed with our sales team per order.
• Lead time: 2 weeks.
• Packing: 10 kg/box; 25 kg or 50 kg/bag; 20 kg/25 kg/30 kg/200 kg/drum; 1000 kg/IBC drum.
• Shipping: per the terms agreed in the current contract.
• After delivery: an inspection certificate is issued stating the batch number and warranty period.
• Before you commit: ask your sales contact about sample availability and the pack size that suits your line.

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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