Fengfan CAS 1606-85-5 BEO 2-Butyne-1 Electroplating Intermediates 4-Diol Bis(2-Hydroxyethyl) Nickel Plating Intermediates

Product Overview

Butynediol ethoxylate (BEO) is a water-miscible nickel-bath intermediate used to brighten and level electrodeposited nickel. It is supplied as a clear yellow liquid at an assay of 98% or above, and it mixes with water in all proportions, so it can be weighed into the tank neat, cut into a premix, or fed from a dosing line without a solubiliser.

That combination is why it is bought by plants running decorative and functional nickel, and by shops that supply nickel plating services to automotive, electronics and hardware customers — an electroless nickel plating company among them. Some buyers add it straight to a working bath to hold luster through a shift; others use it as a building block in a blended brightener package they compound and sell on. Both want the same thing from the drum: a declared active content they can calculate against, and a delivery that behaves like the last one.

It is one of the electroless nickel plating chemicals we hold in regular production.

Specifications

Brightening Performance

What brightening means in practice. A nickel deposit that reads grey and flat under workshop light will not pass as decorative work, and no amount of polishing rescues the parts where the deposit itself is hazy. Added across its working window, butynediol ethoxylate lifts luster at the source and holds it — the brightness is still there hours after the addition rather than fading as the bath works.

Decorative and functional parts both gain. Sanitary fittings, furniture hardware and automotive trim are judged on appearance, and a dull nickel layer is a reject before it ever reaches chrome. Functional parts benefit too: a brighter, smoother surface is easier to inspect and easier to hand to a customer.

A small addition with a wide reach. The working concentration is measured in milligrams per litre, so a single drum treats a large volume of bath, drag-out losses stay modest and a correction costs very little. That is what makes a bright nickel plating process practical to run at production scale, shift after shift.

One line of the package, not the whole package. Most lines combine a carrier, a brightener and a leveler, and this product covers the brightening and leveling side of that balance. The carrier and the top brightener decide how far the shine can go; when appearance drifts, the balance between them is usually the cause rather than the dose.

Check before chasing it with more. Brightness is the visible output of the whole plating process — current density, agitation, temperature, filtration and bath cleanliness all pull on it. If luster drops, verify those first. Adding more brightener is not automatically the fix, and past a point it can push the deposit the other way.

Leveling and Surface Precision

• Smooths what polishing leaves behind. Leveling additives adsorb more strongly where current density is highest, so deposition on the peaks of a machined or brushed surface slows while the valleys catch up. The nickel that comes out is flatter than the substrate went in.
• Less time on the buffing wheel. Post-plate polishing is where labour and reject risk concentrate, whether the shop runs an electrolytic line or is an electroless nickel plating company. A deposit that arrives level needs fewer passes, and fewer passes mean fewer parts scrapped at final inspection.
• An even read across the part. The layer is distributed more evenly across flat faces and gentle curves, so the same shade and the same reflectivity meet the eye wherever the customer looks.
• Leveling that stays put. This is a lasting leveler rather than a short-lived one: the balance dialled in at make-up is still doing its work several shifts later, which is what keeps a bright nickel plating line predictable across a week of production.
• Room to push a difficult geometry. Because the working concentration is low, there is headroom to raise the leveling for a part with awkward recesses without tipping the bath into over-addition.
• One addition, two effects. Brightness and leveling come from the same component, so there is no second additive to balance against the first when the appearance needs adjusting.

Bath Compatibility

Goes into water without help. Full miscibility means the intermediate can be added neat, diluted into a premix or fed through a dosing line with nothing more than normal agitation. There is no oily phase to break up and no solubiliser to buy — and no risk of a bead of neat product sitting on the tank floor and marking the first rack.

Close to neutral as supplied. The material is quoted at pH 5.0~7.0, which sits inside the working range of many nickel baths. It is not a buffer, though: measure your own bath pH after the first addition rather than assuming nothing moved.

One grade across several chemistries. The product is used across a wide range of nickel systems, and a plant running more than one line — an electroplating cell and an electroless plating line, for instance — can hold a single grade instead of a separate additive for each tank. Buyers who already take electroless nickel plating chemicals from us often add this to the same order for exactly that reason.

Useful to formulators. If you compound brightener packages rather than buying them ready-made, a defined single molecule with a declared assay and full water tolerance is the easiest kind of component to work with: it behaves the same in hard water and in demineralised water.

Compatibility still has to be checked. Every brightener package is a balance of charge and addition level. If you plan to swap this grade in for an incumbent, send us the bath type, the current additive list and the target appearance first. We will tell you what to expect rather than leave you to find out on a production rack.

Product Advantages

• Declared activity you can dose against. A stated assay lets you calculate a make-up charge by weight instead of guessing, and it holds from drum to drum.
• Brightening and leveling from one component. One line in the formula instead of two, and fewer interactions to chase when appearance drifts.
• Full water tolerance. Premix it, dilute it or dose it neat — no solubiliser, no residue, no phase separation in the drum.
• Economical at working strength. Milligrams per litre rather than grams, so cost per bath volume stays modest and corrections cost little.
• A second duty in acid media. The same drum covers corrosion inhibition of metals in acidic media, which simplifies stock for plants that pickle and plate in the same building.
• Steadier output. A brighter, more level deposit means fewer parts polished, stripped and re-run — a saving that shows up in the reject column rather than on the invoice.
• A single, documented molecule. A published CAS number, formula and assay mean your technical file and your customer's approval pack can state exactly what is in the bath, which is what an end customer qualifying electroless nickel plating chemicals asks to see first.

Acid-Media Corrosion Inhibition

The second role. Alongside its nickel-bath use, butynediol ethoxylate works as a corrosion inhibitor for metals in acidic media. Where steel or copper meets acid — cleaning, descaling, pickling ahead of plating — the inhibitor slows attack on the base metal while the acid goes on dissolving oxide and scale.

Why one grade for two duties helps. In shops that provide metal plating services, the pickle line and the plating line usually sit in the same building and are covered by the same stores function. Holding one grade for both keeps the shelf simple, cuts the number of batch records to file, and lets a single delivery cover pretreatment and plating.

Upstream of the plating step. Acid inhibition happens well before the part reaches the electrolytic or electroless plating stage, which is why the dosing logic differs from a nickel bath: what matters here is acid strength, temperature, contact time and the metal being protected rather than current density.

It is not a universal inhibitor. Performance is system-specific, and a dose that protects steel in one acid may be wrong for copper in another. Tell us the acid type, its concentration, the working temperature and the substrate, and we will confirm whether this grade fits and at what addition.

Handling. Treat it as an industrial chemical: closed drums, cool dry storage, gloves and eye protection when decanting, and a safety data sheet on file for the grade.

Bath Control and Addition

1. Work out the charge from the bath volume and the 20-100 mg/L window, and write the figure down so the next make-up starts from a known point.
2. Pre-dilute the weighed amount in water or in a portion of bath — the product is miscible in all proportions and disperses faster when it does not go in neat.
3. Add under normal agitation and away from the work, so the intermediate is distributed before the first rack goes in.
4. Run a Hull cell panel across the current density range you actually plate at, and read the bright band before you commit the whole tank.
5. Check appearance through the shift and top up in small increments rather than in one large correction; record each addition against the panel result.
6. Re-check the plating process parameters — temperature, pH, agitation and filtration — before blaming the additive for a change in appearance.
7. Keep part-used drums closed and stored in a cool, dry place, and use clean, dry measuring equipment so water or dirt is not carried back into the drum.

Ordering and Delivery

1. Send us the bath type, the target concentration and the quantity you need, and we confirm the grade and the pack against your enquiry.
2. Minimum order quantity varies by chemical and is confirmed with our sales team for each order.
3. Payment is 100% T/T in advance.
4. Production lead time is 2 weeks.
5. This grade is packed 25 kg/drum. Across the range the standard packing is 10 kg/box, 25 kg or 50 kg/bag, 20 kg/25 kg/30 kg/200 kg/drum and 1,000 kg/IBC drum.
6. Shipping is arranged per the terms agreed in the current contract.
7. After delivery an inspection certificate is issued stating the batch number and the warranty period.

Ethoxylated vs Propoxylated Butynediol

• Both grades are alkyne brighteners and lasting levelers for nickel baths, dosed in milligrams per litre. What separates them is the capping group on the butynediol core: ethoxylated in this grade, propoxylated in the other.
• Numbers to hold side by side. This grade is CAS 1606-85-5, C 8 H 14 O 4, molecular weight 174.2, assay ≥98%, density 1.10-1.15, pH 5.0~7.0, miscible with water in all proportions. The propoxylated grade is CAS 1606-79-7, C 10 H 18 O 4, molecular weight 144.17, assay ≥95%, density 1.05-1.10, refractive index 1.4640-1.4726 at 20 °C.
• Do not substitute gram for gram. Equal mass of two molecules of different molecular weight is not an equal charge, so a dose copied straight across the shelf will land light or heavy. Recalculate from your own panel result instead of carrying the figure over.
• Make the change on a trial tank, not on the line. Where a bright nickel plating process already runs on the propoxylated grade, bring this one in at the low end of the 20-100 mg/L window, keep the incumbent in production until the panel agrees, and move one variable at a time.
• Buy this grade when you want the higher declared activity — ≥98% against ≥95% — and when your formulation already specifies the ethoxylated molecule. In a blended brightener package, a single defined molecule with a published CAS number and assay is the easier component to document and to repeat.
• Buy the propoxylated grade when your existing package, an end customer's approval file or your own trial work supports it; it runs a slightly wider addition range of 20-120 mg/L. We supply both as separate lines, so there is no need to force one into the other's slot.
• Label drums by CAS number rather than trade name. Both are supplied as liquids in 25 kg drums and both are quoted at pH 5.0~7.0, which makes a mixed shelf easy to mis-pick at the tank edge.
• Shops that provide nickel plating services usually settle the question in one afternoon of panels: dose both chemical intermediates at the same mg/L, plate across the current density range your parts actually see, and keep whichever puts the bright band where your work sits.

Reliable Supply for High-Volume Applications

BEO is produced by Fengfan at a purity of ≥98%, a specification that holds steady from batch to batch and meets the expectations of wholesale partners supplying electroless nickel plating factories. For automotive, electronics and hardware programmes, that consistency is what keeps a plating line predictable, so buyers can plan repeat orders against a dependable material rather than adjusting their process around variation. We work with trade partners on an ongoing basis, which means the same grade, the same specification and the same handling are available to you each time you reorder. Volume requirements, packing preferences and delivery schedules vary from one operation to the next, so please share your expected consumption with our team and we will confirm the supply arrangement that fits your production plan.

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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