Product Overview
Ammonium Bifluoride Flakes (CAS 1341-49-7) is a white crystalline solid sold here in Reagent grade, packaged from 2 lb bench quantities up to 44 lb production containers. It is a working fluoride source with strongly acidic character in solution, which is exactly why buyers use it: it attacks silica and metal oxides that milder cleaners leave behind. The buyers we pack this for are glass and metal finishing shops running etching lines, semiconductor and surface-treatment operations, water-treatment operators adjusting pH, and laboratory teams using it as an analytical reagent or fluoride source in synthesis.
Be clear about what you are ordering. This is a Danger-signal-word corrosive and toxic solid (per the product's GHS classification) that ships as Class 8 hazmat (per 49 CFR 172.101). It earns its place in an etching or finishing process precisely because of that aggressiveness. Plan your PPE, storage, and receiving process before the container arrives.
Why This Concentration
This listing is the solid flake form in Reagent grade — not a pre-diluted solution. That matters in three ways for your process. First, flakes let you set your own working concentration: dissolve to the strength your etching bath, cleaning dip, or titration method calls for, rather than paying to ship water. Second, the Reagent designation is the descriptor lab and QC buyers typically specify when a purchase order calls for reagent-labeled material rather than an unspecified industrial solid; review the lot COA and TDS against your own acceptance criteria to confirm fit, because a grade label by itself is a procurement descriptor, not a standards claim. Third, solid handling is its own discipline — moisture pickup and dust control are the operational trade-offs versus a solution, so weigh and dissolve in a ventilated area with full PPE.
Chemical Profile
Ammonium Bifluoride Flakes carries the formula F2H5N with a molecular weight of 57.044 and CAS number 1341-49-7. It presents as an odorless white crystalline solid. The material is soluble in water — the basis of nearly every use on this page — and its published solubility in 90% ethanol is 1.73×10⁵ mg/L. Density is 1.5 at 68 °F, denser than water, so undissolved solid will sink in aqueous baths until it goes into solution. The solid is corrosive to tissue, consistent with its H314 classification (per the product's GHS classification), which is why glove and eye protection are non-negotiable from the moment the container is opened.
Industrial Applications
Every application below traces to the same chemistry: in water, ammonium bifluoride delivers reactive fluoride with an acidic bite.
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Glass etching. Dissolved flakes attack silica, producing frosted or etched glass surfaces. Glass decorators and industrial glass finishers use it where hydrofluoric acid handling is impractical — though the dissolved product demands comparable respect.
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Semiconductor and wafer etching. Used in the electronics industry for etching silicon-based surfaces in controlled process steps.
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Metal cleaning and finishing. Removes oxide scale from metal surfaces ahead of plating or coating. Finishing lines use it in pickling and surface-preparation dips where oxide removal governs adhesion.
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Fluoride source in synthesis. Chemical manufacturers use it as a fluoride donor in the synthesis of fluorinated compounds.
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Water treatment pH adjustment. Operators use it for pH adjustment in treatment processes where its acidic character is the working property.
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Analytical reagent. Laboratory teams use it in titrations and other analytical chemistry work calling for a reagent-labeled fluoride solid.
Handling & Storage
The signal word is Danger. The governed hazard statements are H301 Toxic if swallowed, H311 Toxic in contact with skin, H331 Toxic if inhaled, and H314 Causes severe skin burns and eye damage (per the product's GHS classification). Treat all four as operating instructions, not label decoration: this solid is toxic by three routes and corrosive to tissue on contact.
Handle it the way our warehouse team does. Wear chemical-resistant gloves and sealed goggles at minimum, and control dust with ventilation whenever weighing or dissolving flakes — H331 makes airborne dust an inhalation hazard, not just a housekeeping issue. Store in a cool, dry place away from moisture; keep it away from strong acids and strong bases, which can drive hazardous reactions. HDPE and glass containers are compatible; avoid metal containers, which the material attacks. Keep the original labeled packaging until the material is consumed, and keep the SDS at the point of use.
Hazmat & Shipping
This product ships as regulated hazardous material under the proper shipping name Ammonium hydrogendifluoride, solid (per 49 CFR 172.101). It is assigned UN1727 (per 49 CFR 172.101), Hazard Class 8 — corrosive (per 49 CFR 172.101), Packing Group II (per 49 CFR 172.101). Our team packages it in UN-rated containers with the required marks, labels, and shipping papers prepared for the carrier. If your receiving dock has hazmat acceptance procedures, share this classification with them before ordering so the delivery clears intake the first time.
Documentation
A Safety Data Sheet ships with every order and is available in English, Spanish, French, and Japanese — useful when your EHS program or overseas affiliate needs documentation in more than one language. A lot-specific Certificate of Analysis is available for the material you receive, so your QC lead can verify the lot against your own acceptance criteria, and a Technical Data Sheet is available for process and engineering review.
Why Buy from Alliance Chemical
We offer Ammonium Bifluoride Flakes across a working range — 2 lb and 5 lb containers for bench and pilot work up to 44 lb production containers — each shipped as properly classified UN1727 Class 8 hazmat with SDS documentation in four languages and a lot-specific COA available. That combination of right-sized packaging and complete paperwork is what keeps a corrosive solid moving through your receiving dock instead of sitting in compliance limbo.
Alliance Chemical has operated since 1998 and has served 50,000+ customers from our Taylor, Texas warehouse. The shipping and handling guidance on this page is reviewed by Andre Taki, DOT Hazmat Specialist. If you need help matching pack size to your process or your dock's hazmat procedures, contact our team before you order.
