Sourcing ammonium bifluoride is not a simple price-per-pound decision. The grade controls iron contamination, the form controls dust and dissolution, the packaging controls handling, and behind all of it sits the same fluoride hazard as liquid hydrofluoric acid. Specifying it well means matching those four things to the job, and treating the solid with the respect its chemistry demands.
The short version: ammonium bifluoride (ABF, CAS 1341-49-7, NH4HF2) is bought by grade (technical at roughly 98 to 99% for most uses, higher-purity low-iron grade for anodizing and electronics) and by form (flake for low dust, powder for faster dissolution). It ships in bags, drums, and pallets as UN1727, Class 8. The solid is easier to ship and store than liquid HF and is not DOT toxic-labeled, but it is corrosive, toxic, and liberates HF, so it is not safe, and it has to be handled to HF standards.
Grade: technical versus high-purity
The grade question is really about iron and heavy-metal content.
- Technical / industrial grade (typically about 98 to 99% assay) is the right and economical choice for aluminum brightening, masonry cleaning, glass etching, descaling, and oil-field use, where trace iron does not matter.
- High-purity / electronic grade (higher assay, low iron and heavy metals) is specified for anodizing pretreatment, microelectronics, and analytical use, where contamination shows up in the finish or the result.
Match the grade to how much contamination matters, and confirm purity on the Certificate of Analysis.
Flake versus powder
ABF (CAS 1341-49-7, PubChem CID 14935) is supplied as flake or powder, and the choice is a handling trade-off. Flake is the bulk-handling standard because it generates less respirable dust, which matters for a fluoride solid. Powder dissolves faster but is a greater inhalation hazard and demands tighter dust control. Both are hygroscopic and must be kept sealed and dry so they do not cake or absorb moisture.
Packaging and transport
ABF ships in bags, drums, and pallet quantities as UN1727, ammonium hydrogendifluoride, solid, Class 8 (corrosive), Packing Group II. The solid form is one reason buyers prefer it over liquid HF: it carries an easier transport profile and is not toxic-labeled the way liquid HF (UN1790) is, while still requiring corrosive-hazmat documentation and compatible packaging.
Handling and storage
The handling burden is the part a price sheet does not show. ABF must be stored dry and sealed in compatible packaging, polyethylene, polypropylene, or paper, and never in glass (it etches) or metal (it corrodes and can evolve hydrogen) (CAMEO/NOAA). It must be kept away from strong acids, bases, and oxidizers. Because it liberates HF, operations that use it run HF-grade PPE and keep calcium gluconate on hand, and they treat fluoride-bearing effluent before discharge. The full hazard picture is in understanding ammonium bifluoride.
What it is used for
ABF supports a range of industrial jobs, each with its own grade and concentration logic:
- Aluminum brightening and fleet acid wash, the largest commercial use.
- Efflorescence and masonry cleaning.
- Rust, scale, and metal descaling, pickling, and anodizing prep.
- Glass etching and frosting, and oil-well acidizing as a solid fluoride source.
What to specify when you request a quote
To quote and ship the right material, we need the application, the grade (technical or high-purity), the form (flake or powder), the packaging (bag, drum, or pallet), and any purity or iron-content limits your process requires. With those we confirm the product, documentation, and logistics.
Buying ammonium bifluoride from RawSource
RawSource supplies ammonium bifluoride (CAS 1341-49-7) in technical and higher-purity grades, as flake or powder, in bags, drums, and pallets, with CoA and SDS on every shipment, for industrial manufacturing, transportation, masonry, metal finishing, and oil and gas. We also supply hydrofluoric acid where liquid HF is the right tool. Send us your application, grade, form, and packaging needs for a quote and lead time.
Frequently asked questions
What grade of ammonium bifluoride should I buy?
Technical grade (about 98 to 99%) for aluminum brightening, masonry, etching, descaling, and oil-field use; a higher-purity, low-iron grade for anodizing pretreatment, electronics, and analytical use. Confirm the grade and purity on the CoA.
Is ammonium bifluoride sold as flake or powder?
Both. Flake is the bulk-handling standard because it produces less respirable dust; powder dissolves faster but is a greater inhalation hazard. Both are hygroscopic and must be kept sealed and dry.
How is ammonium bifluoride packaged and shipped?
In bags, drums, and pallet quantities, as UN1727, Class 8 (corrosive), Packing Group II, in compatible polyethylene, polypropylene, or paper packaging, with full hazmat documentation.
How should ammonium bifluoride be stored?
Sealed and dry, in polyethylene, polypropylene, or paper, never in glass or metal, away from strong acids, bases, and oxidizers. Because it liberates HF, keep calcium gluconate on hand and use HF-grade PPE.
Why choose ammonium bifluoride over hydrofluoric acid?
The solid is easier and safer to ship and store, is not DOT toxic-labeled, and releases HF only in solution. It is still corrosive, toxic, and liberates HF, so it is not safe, only easier to handle. Liquid HF is faster and stronger where the application needs it.
Editorial note. This article is general procurement and technical reference for industrial and professional buyers and is not safety or treatment advice. Ammonium bifluoride is hazardous: it is toxic, causes severe skin and eye burns, and liberates hydrofluoric acid (HF) on contact with moisture, so it carries HF-type hazards despite being a solid, and it is not “safe.” Grade, form, packaging, transport, and antidote references (PubChem, CAMEO/NOAA, supplier SDS) are sourced facts to verify and apply through your own SDS, EHS program, and qualified professionals. ABF is for industrial and professional use only by trained personnel with appropriate controls, including calcium gluconate availability. Typical values are not a guaranteed specification; the Certificate of Analysis governs the material you buy. Always consult the current Safety Data Sheet (SDS) before handling. RawSource makes no warranty, express or implied, and assumes no liability for use of this information.
