Potassium Aluminium Fluoride PAF · Potassium Cryolite · KAlF₄
The fluoroaluminate flux for aluminium brazing and secondary aluminium smelting — also used to help remove magnesium from liquid aluminium alloys. A close partner to our magnesium remover and cover flux.
Chelora Chemicals delivers potassium aluminium fluoride to brazing-flux makers, aluminium recyclers and foundries across the United States, with a batch COA and SDS on every consignment.
- CAS Number
- 60304-36-1
- EC Number
- 262-153-1
- Name
- Potassium tetrafluoroaluminate
- Principal formula
- KAlF₄
- Molecular weight
- ≈ 142 g/mol
- Density
- ≈ 2.9 g/cm³
- Appearance
- White powder
- HS Code
- 2826 90
Note: commercial PAF is a potassium-aluminium-fluoride composition with KAlF₄ as the principal component. Confirm composition and classification on the SDS for your batch.
From fluoride to treated aluminium melt
PAF is a fluoride-based flux ingredient. The neighbouring products below are all on this site.
Related: potassium fluoborate · cover flux · alkali remover · master alloys
What PAF is used for
Potassium aluminium fluoride (PAF, potassium tetrafluoroaluminate, KAlF₄) is a white inorganic salt flux. Under CAS 60304-36-1 it is registered as a potassium-aluminium-fluoride composition, with KAlF₄ as the principal component.
Its best-known use is as a non-corrosive flux for brazing aluminium alloys with Al-Si filler metal, supplied as a powder for use in flux pastes and paints. It is also used as a salt flux in smelting secondary aluminium to help recover metal, to reduce or remove magnesium from liquid aluminium alloys, as an abrasive filler, and as a fluxing agent in metal-industry additives that helps them disperse in the charge.
Typical use points
- Aluminium brazing. Flux powder for flux pastes, paints and brazing preparations.
- Secondary aluminium smelting. Salt-flux component to help maximise metal recovery.
- Magnesium reduction. Used to lower magnesium in liquid aluminium alloys.
- Abrasives and additives. Filler in abrasives, and a dispersion aid in metal additives.
Handling character
PAF can release fluoride gases when used hot, and its SDS carries a repeated-exposure warning. Full hazard detail is in the Safety section below.
| Parameter | Value |
|---|---|
| Appearance | White powder or fused granules |
| Composition | KAlF₄ principal; per SDS and COA |
| Melting behaviour | Brazing grades melt below the filler-metal range; per grade |
| Particle size | Per grade; ultrafine powders for pastes |
| Moisture & insolubles | Per batch COA |
Important: we publish no invented specification limits. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | White solid |
| Density | ≈ 2.9 g/cm³ |
| Water solubility | Slightly soluble (≈ 2 g/L) |
| Thermal behaviour | Flux grades begin to melt below about 555 °C (producer data) |
| Combustion/hot use | May release fluoride gases |
Constants compiled from public reference and producer data for CAS 60304-36-1 and rounded for readability. Reference sources differ on melting figures between grades, so treat them as orientation, not as a specification.
Where our customers put PAF to work
From aluminium brazing to secondary smelting and magnesium control.
Aluminium brazing flux
Non-corrosive flux for joining aluminium alloys with Al-Si filler metal, used as powder in flux pastes and paints.
- Ultrafine powder grades
- Batch-to-batch consistency checks
Secondary aluminium smelting
Salt-flux component that helps maximise metal recovery from scrap and dross.
Magnesium reduction
Used to reduce or remove magnesium from liquid aluminium alloys.
Abrasives
Used as a filler in the manufacture of abrasives.
- Powder grades by particle size
- Documented batch traceability
Metal additives
A fluxing agent within additives that helps them disperse in the charge.
Contract & scheduled supply
Plants running continuous consumption are supported with scheduled delivery against a call-off calendar.
- Annual contracts with scheduled call-off
- Price held across the contract period
Delivered to US plants and ports
We ship Potassium Aluminium Fluoride to nominated delivery points across the United States. Chelora Chemicals is a sourcing and supply partner, not a US manufacturer, and does not hold US stock.
Gulf Coast
Entry point for bulk and containerised consignments.
- Houston & Galveston, TX
- New Orleans & Baton Rouge, LA
Northeast
Delivery into the mid-Atlantic and New England manufacturing belt.
- Newark & Elizabeth, NJ
- Philadelphia, PA
Southeast
Port-side delivery for Carolinas, Georgia and Florida plants.
- Savannah, GA
- Charleston, SC
Midwest & Great Lakes
Rail and truck forwarding to the industrial Midwest.
- Chicago, IL
- Detroit, MI
- Cleveland & Columbus, OH
West Coast
Pacific routing for West Coast die casters and foundries.
- Los Angeles & Long Beach, CA
- Seattle & Tacoma, WA
Southwest & Mountain
Inland delivery forwarded from the Gulf or Pacific gateway.
- Dallas–Fort Worth, TX
- Phoenix, AZ
- Denver, CO
Importing into the United States
Potassium aluminium fluoride is a TSCA-regulated chemical substance, and it is registered as a potassium-aluminium-fluoride composition. Under TSCA section 13 the importer of record, or its authorised agent, must certify to US Customs and Border Protection that each shipment either complies with TSCA or is not subject to it. We confirm the substance's TSCA Inventory status and agree in writing who files that certification before the first consignment moves.
Which party carries that duty follows the Incoterm. On FOB, CFR or CIF terms it is usually the US buyer; on DDP terms it can be the seller or its agent. Safety data sheets and labels are supplied to OSHA's updated Hazard Communication Standard, and transport classification is confirmed before booking.
| Item | How it works |
|---|---|
| Delivery points | Any nominated US plant, warehouse or port of discharge |
| Incoterms quoted | FOB · CFR · CIF · DDP |
| Importer of record | Agreed in writing before the first shipment |
| TSCA certification | Section 13 certification filed at entry |
| Documentation | Batch COA, SDS, packing list, certificate of origin |
| Pack formats | Bags, FIBC or drums, confirmed at quotation |
Note: regional coverage describes where we deliver, not where we hold inventory. Lead time depends on producer scheduling and ocean transit to your nominated US port — we confirm both in the quotation.
How we supply potassium aluminium fluoride
Chelora Chemicals is a supplier and sourcing partner, not a manufacturer. Composition, particle size and melting behaviour decide whether a lot suits a brazing paste or a smelting flux, which shapes how we select producers on this line.
We place your order with whichever qualified producer best matches your grade, price point and delivery window, and confirm US import requirements before booking.
- Grade confirmed before we quote. Composition, particle size and moisture are checked against your process, not just the headline assay.
- TSCA status and import certification settled first. We confirm Inventory status and agree who files the section 13 certification before the first shipment.
- Hazard documents checked. Classification is taken from the batch SDS and confirmed before booking.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
- One desk for the melt shop. Order alongside magnesium remover, cover flux and potassium fluoborate.
Bagged, jumbo or drummed
Tell us your preferred format and handling route and we will quote and classify to it.
Lined bags
PP-woven or multi-wall bags with a polyethylene inner liner. Bag size confirmed at quotation.
Liner-fitted jumbo bags
Bulk bags for plants handling material by hoist or bag-tip station.
Sealed drums
Rigid, stackable packs where your warehouse and handling route suit them.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with documentation filed before booking.
Trial / sample quantities
Small packs dispatched for process qualification before a commercial order is placed.
Fluoride hazard on repeated exposure — control dust and fume
Potassium aluminium fluoride is harmful if inhaled and can damage organs through repeated exposure. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document.
Commonly listed hazards
H319Causes serious eye irritation.H332Harmful if inhaled.H362May cause harm to breast-fed children.H372Causes damage to organs through prolonged or repeated exposure.H412Harmful to aquatic life with long lasting effects.
Classification varies. Some SDS also list skin irritation (H315) and respiratory irritation (H335). Follow the SDS for your batch and confirm your site's exposure-limit obligations with your EHS team.
Storage
Store in closed containers in a cool, dry, well-ventilated area away from moisture and incompatible materials listed on the SDS.
Handling
Handle with local exhaust ventilation and dust control. Avoid inhaling dust or fume, wear eye protection, gloves and protective clothing, and keep washings out of drains. When used hot, PAF can release fluoride gases, so control and scrub emissions as your permit requires.
Transport
We confirm and document the exact transport classification and routing for your specific shipment and destination from the SDS.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Composition, particle size, moisture and melting behaviour confirmed against your process requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS and TSCA certification data checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How PAF is made and works
Potassium aluminium fluoride is made by combining potassium and aluminium fluoride sources, for example potassium fluoride and aluminium fluoride, into a potassium-aluminium-fluoride salt. It is related to potassium fluoride and potassium fluoborate, which serve similar metallurgical roles.
In brazing, the molten flux dissolves the oxide film on aluminium so Al-Si filler metal can wet and join the parts. In smelting, it acts as a salt flux that helps free metal from oxide, and it can reduce magnesium in the melt. Pair it with magnesium remover and alkali remover where melt chemistry matters.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Chemical family | Inorganic fluoroaluminate flux |
|---|---|
| Synonyms | Potassium tetrafluoroaluminate, potassium cryolite, PAF |
| Related fluorides | Potassium fluoride, potassium fluoborate |
| Melt treatment | Magnesium remover, cover flux |
| Main users | Brazing-flux makers, aluminium recyclers, foundries |
The rest of the fluoride and flux range
Related fluorides, fluxes and melt-treatment grades, all supplied from the same desk.
Potassium aluminium fluoride, answered
What is potassium aluminium fluoride used for?
What are the other names for potassium aluminium fluoride?
What is the CAS number?
How is PAF used in aluminium brazing?
How does PAF help remove magnesium from aluminium?
Is potassium aluminium fluoride hazardous?
Is PAF soluble in water?
What grade and packing do you offer?
Do you deliver across the United States, and what documents come with it?
Do you manufacture this yourself?
Get a quote on Potassium Aluminium Fluoride
Send us your required grade, particle size, pack size, US delivery point and Incoterm. We will come back with a firm quote, lead time and full documentation, and can price related fluorides and fluxes in the same enquiry.