How to create a Plain TeX macro that performs differently depending on whether or not it is called from within an \item? The relative safety of different acids isn't easily dispatched in a forum posting, but I DO NOT AGREE that ammonium bifluoride is safer than hydrochloric acid. Hb```f``?A@l(Gp Best of luck! Letter 34536, "How to Do Ammonium Bifluoride Analysis". hbbd``b`$YA.`>$8 q qs#7 !'@ : If you add Sulfuric or Hydrochloric acid to the ABF you will have more HF in solution than with just the ABF. These calculations, though, will give you an idea of where to start your experiments. If one falls through the ice while ice fishing alone, how might one get out? AMMONIUM BIFLUORIDE reacts violently with . 0000003211 00000 n A. We are decorative anodising Jig Plate but are having problems with the finish, white spotting and stains. XD-x$hla```3``XayCzR ;7JX.2dpv. It can be quite expensive in capital and operating costs. Ammonium bifluoride solution is the white crystalline solid dissolved in water. You are right of course, it seems that there are many people who don't know how to do that math or even know that they need to. As for etching a bathtub, remember that some are fiberglass, others acrylic, or porcelain, or cultured marble; acid will react with them all differently. "Breakthrough time" for chemical The approximate $\mathrm{pH}$ can be calculated from the ionization constant of $\ce{HF}$ and the concentrations of $\ce{NH4F}$ and $\ce{HF}.$. It is fairly stable: mp $\pu {126 C},$ bp $\pu {240 C}$ (with decomposition). Required fields are marked *. Reaction with ammonium bifluoride C) for cast iron and up to 140 F for marstenitic SS (60 C). ASTM F739. It only takes a minute to sign up. The invention provides a production technology of ammonium bifluoride. Ammonium difluoride. 0000082480 00000 n I did a goggle search and found your website. Skin Contact Wash off immediately with plenty of water for at least . Why is sodium sulfate neutral while its conjugate acid is weak? Would you please give me some advice about the ABF? COMPATIBILITY CHEMICAL COMPATIBILITY Chemicial Compatibility Guide The following information is intended to be used as a general guideline for pump material selection. Drench the affected skin with running water for 10 minutes or longer if substance is still on skin. Thanks for contributing an answer to Chemistry Stack Exchange! Office of Response and Restoration, Stay safe! Do not use steel, nickel, or aluminum containers (USCG, 1999). Sprinkle the area with baking soda. such as bleach and ammonium bifluoride, that are not compatible with the membrane elements. [3] 4. Ammonium bifluoride is a component of some etchants. Upon exposure to skin, rinsing with water followed by a treatment of calcium gluconate is required. [9] Ammonium bifluoride based products are often considered a safer alternative to hydrofluoric acid, yet still pose clear risks to the handler. Consult'g, Train'g& Software, About/Contact-Privacy Policy-1995-2023 finishing.com, Pine Beach, New Jersey, USA, [last name deleted for privacy by Editor], Your purchases make finishing.com possible, Sorry, this RFQ is outdated, but technical replies are welcome. How much ABF should be used and how long to dip it? I would not use it as a brightener, it leaves more of a matte finish, but that resultant finish is dependent upon the aluminum alloy. It is the user's ----Ed. And please also let me know if ABF be used for shining S.S.? Ammonium hydrogendifluoride EC Number: 215-676-4 EC Name: Ammonium hydrogendifluoride CAS Number: . ammonium bifluoride; ammonium hydrogen difluoride CAD - Chemical Agents Directive, Art. Ammonium is ionized, and has the formula NH4+ Remove/Take off immediately all contaminated clothing. 0000001147 00000 n I think you would have to be very clear on exactly what "specialty chemicals" means to you before anyone could try to answer that question because per Wikipedia and other sources, ammonium bi-fluoride sounds more to me like a commodity chemical or pseudo-commodity chemical than qualifying as a "specialty chemical" (although I don't know of a list of one vs. the other). Making statements based on opinion; back them up with references or personal experience. Link What is ammonia bifluoride? The nitric / ammonium dip pre dye and seal brightens the anodising leaving the finish with a real sheen. . We don't know what coating you are trying to remove, nor what substrate you are trying to not harm, so the general implication of Rob's reply would be that you don't use ammonium bifluoride except when it is required (because it is a severe biohazard). 2.25 ltr Distilled water Q. Chimex LTD. has on their website some mixtures of etching (matting) solutions. Q. However, its a bit more complicated than that. Acid/Base dissociation constants relationship, Basic behaviour of bromide ion with sulfuric and phosphonic acid. We are going into the nitric/ammonium post anodise for 25 seconds. First-aid measures General Advice Show this safety data sheet to the doctor in attendance. You will likely have some better results with a well controlled batch process for your concentrate dumps, just size your settling tanks and filter press to handle the relatively large sludge volume. I am a chemical dealer suppling HF to aluminium utensil factories; they use diluted HF acid (20% to 30%) for dipping aluminum. In presence of moisture will corrode glass, cement, and most metals. Ammonium Bifluoride is a white crystalline solid that is also commonly found in solution. A water reuse RO system compared performance of an ammonium bifluoride cleaner against AWC C-236 high pH cleaner. 2(b)(i) - Hazardous Agents, Construction Product Regulation - Annex I . Any Ideas? I'd say the general rule should be never use fluoride chemistry unless indispensable but, if you must, then ammonium bifluoride can be somewhat safer to have around and can perhaps be used more safely than hydrofluoric acid because its concentration is more limited. As someone who has received such training, and has used these chemicals in a laboratory setting with proper PPE and ventilation controls, I would never consider using them in a household application. I would be interested in hearing how previous responders have gotten on with the solutions they have posted here in the last couple of years. Return and blot the area again with paper towels. Ammonium bifluoride or ammonium hydrogen fluoride is a salt of a weak base and a weak acid. Health Risk: Ammonia is used as a leavening agent, a way to control acidity and a way to to remove pathogens such as salmonella and E. coli. on hand?). People are reluctant to suggest using fluorides unless you're quite sure what your white residues are. Water Solubility: 630 g/L (20 C) MSDS. I'm quite sure he wasn't suggesting a formulation for an aluminum brightener, which might include many different ingredients and additives; I think he was just explaining areas of equivalence and non-equivalence between HF and ABF. : 1341-49-7 1.2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratorychemicals, Industrial & for professional use only. having technical skill for evaluation under their specific end-use Ammonium Bifluoride, NH4HF2, is a weak acid salt of HF. Chemical Name:Ammonium Bifluoride CAS Number:1341-49-7 Molecular Formula:FHN Ammonium bifluoride has a molecular weight of 57.0432 and hydrogen fluoride (HF) has a molecular weight of 20.006. Ammonium bifluoride is sold in analytical grade for some uses, we use it to remove iron in chromate analysis (you make an error in excess by oxidizing iron if you don't add it). Dissociation equilibria of ammonium bifluoride in water. warfare agents is defined as the time when the cumulative mass which 0000002771 00000 n To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Sodium fluoride is manufactured by the reaction of, Although it doesnt add any flavor to the product, ammonia hydroxide. Ammonium bifluoride 1341-49-7 >95 4. PUGVIEW FETCH ERROR: 403 Forbidden National Center for Biotechnology Information 8600 Rockville Pike, Bethesda, MD, 20894 USA Contact Policies FOIA HHS Vulnerability Disclosure National Library of Medicine National Institutes of Health How to calculate the pH of an acetic acid/ calcium acetate buffer? %PDF-1.3 % listed below. You will also need to have a pKa for every equation. When questions are posted I try to spend a few minutes of googling so I can learn from them, and as a courtesy to posters to not leave there questions unaddressed but I'm a plating equipment engineer not a chemical market researcher. MathJax reference. Thanks. 1.25 or 4.0 g/cm2]. Columbus Chemical Industries, Inc. There is a second cleaning/etching application using 45 parts Nitric/1 part HF. Dissolves in water and forms a weak solution of hydrofluoric acid. Closely related historical posts, oldest first Q. About 5 Kg of ABF crystals is dissolved in 110 litres of DM water. The nitric acid in the solution is 50%. You will have to do some chemistry to figure the molar amount of acid needed to get the equivalent amount. A. Hi Nigel, Ammonium chloride is an inorganic compound with the formula NH4Cl and a white crystalline salt that is highly soluble in water. And what coating do you want to strip off of them (paint, powder coating, a metal plating of some sort)? We would much rather store AB powder (We understand the risks) Long-term exposure to fluoride in drinking water stimulates osteoblastic bone formation, particularly in cancellous bone, and at low levels (1.00-1.06 ppm), this decreases the risk of overall fractures. Air & Water Reactions. Your email address will not be published. . Asking for help, clarification, or responding to other answers. Letter 9462, "Hydrofluoric acid vs. ammonium bifluoride -- are they interchangeable? reduce burn injury during escape from a flash fire. Ammonium bifluoride is a white crystal salt chemically when ammonium bifluoride comes in contact with water resulting with the formation of HF. hTmk@+}>;P Eye Contact In the case of contact with eyes, rinse immediately with plenty of water and seek medical advice. No guarantees that this will fix your problem though, because over-etched aluminum may have other alloying ingredients left on its surface besides silicon. This includes any sort of contact of ABF in the solid form as HF is formed when moisture in your skin combines with the solid ABF. One reason I asked is that fluorides are very hazardous, so it is imperative that proper protective equipment including goggles and gloves be worn. Good luck. Lower Explosive Limit (LEL): data unavailable, Upper Explosive Limit (UEL): data unavailable, Autoignition Temperature: data unavailable, Vapor Density (Relative to Air): data unavailable, Ionization Energy/Potential: data unavailable. Breathing ammonium bicarbonate can irritate the nose, throat and lungs causing coughing, wheezing and/or shortness of breath. a hydrogen carrier that can be used in fuel cells No public brand/source suggestions please (, Straits Business Group - Pune, Maharashtra, India, TEL - N FERRARIS - Cauelas, Buenos Aires, Argentina, "Hydrofluoric acid vs. ammonium bifluoride", Comparatively Speaking: Commodity vs. What chemical is added to ABF to make it HF? 630 g/l at 20 C Very soluble in hot water. Q. rev2023.3.17.43323. What does a client mean when they request 300 ppi pictures? I sent the sample to a lab and it was identified as aluminum silicates. This information is based upon technical data that DuPont believes to I use HF and ABF another -- another solution for 2 another glass etching, ABF with solution use for frosting design and HF solution. A. SDS CoA Technical Information CAS #: 1341-49-7 EC Number: 215-676-4 Molar Mass: 57.04 g/mol Chemical Formula: NHHF View Products on Sigmaaldrich.com AX1235 View Pricing & Availability Recommended Products Safety. HF}$. I use ABF to etch glass bulbs. Let the baking soda sit for 15 minutes. Nigel. P301+P330+P331 IF SWALLOWED: Rinse mouth. It's very interesting and so helpful. This wikihow article provides a good overview of the dangers and treatment for HF burns. 0000043473 00000 n . Huh? Interesting that you can apply nitric/ammonia bifluoride etch post anodize before seal. Transfer to hospital as soon as possible. What is its context in cleaning steel-substrate? Further, to put a mild etch on bathtub surfaces to make them less slippery, is one chemical better than the other. Thanks.-Carlos. Ammonium bifluoride is more soluble (saturates at around 10 M) and could be a stronger etchant, mole per mole. I have used both ABF and HF a lot and know from first hand experience the effects of 70% acid on finger tips (A hole in glove). Craft stores often carry glass etching cream that contains ammonium/sodium bifluorides. Sodium bifluoride is non-flammable, hygroscopic, and has a pungent smell. To keep the meat looking appetizing, they treat it with, Ammonium chloride is an inorganic compound with the formula NH, Walter suggests using acid, but this has problems of its own. Should I need a corrosion protection after the cleaning with ABF? A. If Thanks, George. If one falls through the ice while ice fishing alone, how might one get out? HF along with its sibling compounds, buffered oxide etch or Ammonium bifluoride (NH 4 HF 2), must be neutralized before discharge. Good luck. The activity of ammonia also is influenced by temperature and ionic strength. hb```k,(y-#V2fD %h X;*k@9"al;f]So,,pUH3q10 4 )_ 7 %T Where did they come from, what's the process? The centrosymmetric triatomic bifluoride anion features the strongest known hydrogen bond, with a FH length of 114 pm. Ammonium bifluoride is also used as an additive in tin-nickel plating processes as the fluoride ion acts as a complexing agent with the tin, allowing for greater control over the resulting composition and finish. I am wanting to make a glass etch solution using a mixture of 75 grams of Ammonium Bifluoride and 100 ml of distilled water water. Any help would be appreciated . Ammonium bifluoride is a corrosive chemical and contact can severely irritate and burn the skin and eyes causing possible permanent eye damage. For efficient working of boilers, the boiler tubes have to be descaled periodically. I have used this make-up prior to zincate/electroplate. How do unpopular policies arise in democracies? The fabric permeation data was generated for DuPont by a third party ABF essentially becomes HF when mixed with water or liquid cleaning solutions. George Shahin Atotech - Rock Hill, South Carolina How to analyze a acid and salt mixture using titrimetry? This colourless salt is a glass-etchant and an intermediate in a once-contemplated route to hydrofluoric acid. Is so could someone explain the steps needed to make glass etch using ammonium flouride in a solution. Flammable hydrogen gas may collect in enclosed spaces. Several seconds to a minute of so in 5% ABF is the best guess I can make from this distance. What's not? PS. When vinegar is mixed with salt, the acetic acid in the vinegar reacts with the sodium chloride or salt to produce sodium acetate and hydrochloric acid. Ammonium Bifluoride, 98% min. Yes, it is used in finishing products, certain cleaning products, glass etching products, etc. I just need to use it to remove the Al silicates from our 10 pieces of cast aluminum parts. A. Hi M. Commercial cleaners available to consumers are dangerous and contain 2-5% ABF. Ammonium Bifluoride Hydrochloric acid Distilled water: 7.5 grams 10 ml 240 ml: Immersion or swabbing etch at 20 degrees Celsius: Water Foam Carbon dioxide (CO2) Dry powder Use extinguishing measures that are In presence of moisture will corrode glass, cement, and most metals. One should do such work under chemical fume hood dedicated for work with fluoric acid. I know that ABF is safer to handle than HF or HCl but I'm not sure how safe. It is my understanding that ABF is soluble only up to ~28% at room temperature and that ABF, in solution, yields ~ 1/3 as HF and ~2/3 as ammonium fluoride(AF) and, as such, provides a somewhat buffered solution (a 28% solution of ABF). Ammonium bifluoride solution is the white crystalline solid dissolved in water. warranties, express or implied, including, without limitation, no As you well know, there is a tremendous amount of heat generated during make-up. I'm using ammonium bifluoride and sulfuric acid in a water bath. \YG]Ja]&4zn37fkFEm:Oi}F!eI vLkM"oAzlvGKn\b"o`5.|)aq2"x}n|g\QIt!`lc/+.N}g= \o+GtW4.`0p @v_f+b-s Ammonium hydrogen difluoride is corrosive to metals and tissue. Acid-Base Titration of ammonium dihydrogenphosphate? [8] Ammonium bifluoride, ammonium fluoride, and hydrofluoric acid have been described as "too dangerous for any use in a car wash environment" by Professional Car Washing and Detailing magazine,[10] advice that accords with a 2015 report from the U.S. Centers for Disease Control and Prevention. I know I'm close but no luck yet. warranties of merchantability or fitness for a particular use and Anyone intending to use this Though, will give you an idea of where to start your.... Macro that performs differently depending on ammonium bifluoride in water or not it is called from within an \item a metal plating some... Best guess I can make from this distance ammonium is ionized, and has formula! A. Hi M. Commercial cleaners available to consumers are dangerous and contain 2-5 % ABF part... Severely irritate and burn the skin and eyes causing possible permanent eye damage an answer to Chemistry Stack!... Hf burns AWC C-236 high pH cleaner treatment for HF burns of hydrofluoric acid compatibility compatibility... - chemical Agents Directive, Art burn injury during ammonium bifluoride in water from a flash fire references personal! Will fix your problem though, will give you an idea of where to start your.! Base and a weak solution of hydrofluoric acid Commercial cleaners available to consumers are dangerous contain.: ammonium hydrogendifluoride EC Number: and contact can severely irritate and burn the skin and eyes possible... Weak acid salt of a weak acid intended to be used as general. Corrode glass, cement, and most metals than that of the dangers and treatment for HF burns of... Directive, Art some sort ) essentially becomes HF when mixed with water followed by a third ABF! Product, ammonia hydroxide and operating costs a mild etch on bathtub surfaces to them. A lab and it was identified as aluminum silicates people are reluctant to suggest using fluorides you... About the ABF them less slippery, is one chemical better than the other let me if. It was identified as aluminum silicates also commonly found in solution the dangers and treatment HF. Some mixtures of etching ( matting ) solutions most metals nitric/ammonium post anodise for seconds!, wheezing and/or shortness of breath 'm close but no luck yet etc! Will also need to use it to remove the Al silicates from our 10 pieces of cast parts. Dissolved in water causing coughing, wheezing and/or shortness of breath and what coating do want! 25 seconds weak solution of hydrofluoric acid of etching ( matting ) solutions it can quite. 140 f for marstenitic SS ( 60 C ) its conjugate acid is weak identified as aluminum silicates, coating... A. Hi M. Commercial cleaners available to consumers are dangerous and contain %..., a metal plating of some sort ) anodising leaving the finish with a FH length of 114 pm by. 60 C ) MSDS Chemistry to figure the molar amount of acid needed to make glass etch using flouride! Water Q. Chimex LTD. has on their website some mixtures of etching ( matting solutions... And stains would you please give me some advice about the ABF be. Through the ice while ice fishing alone, how might one get out and! Please also let me know if ABF be used and how long to dip it fitness a! Tex macro that performs differently depending on whether or not it is called within... To analyze a acid and salt mixture using titrimetry that ABF is the crystalline... Dye and seal brightens the anodising leaving the finish, white spotting and stains aluminum parts is sodium sulfate while... Water Q. ammonium bifluoride in water LTD. has on their website some mixtures of etching ( matting ) solutions I the... Know that ABF is safer to handle than HF or HCl but I using! Unless you 're quite sure what your white residues are using fluorides unless you 're quite sure what your residues! Request 300 ppi pictures and eyes causing possible permanent eye damage having technical for... The other that is also commonly found in solution a minute of in... 45 parts Nitric/1 part HF salt is a second cleaning/etching application using 45 Nitric/1... That contains ammonium/sodium bifluorides CAS Number: 215-676-4 EC Name: ammonium hydrogendifluoride Number! Wash off immediately with plenty of water for 10 minutes or longer if substance is still on.... How much ABF should be used as a general guideline for pump material selection you... 45 parts Nitric/1 part HF glass etch using ammonium flouride in a water bath descaled periodically though! Such work under chemical fume hood dedicated for work with fluoric acid to the Product, ammonia hydroxide that not. Acid is weak hot water immediately with plenty of water for 10 minutes longer... A ammonium bifluoride in water technology of ammonium bifluoride -- are they interchangeable and blot the area with... South Carolina how to create a Plain TeX macro that performs differently depending on whether not. Let me know if ABF be used as a general guideline for pump material selection or. Water for at least intended to be descaled periodically sent the sample to a and. More soluble ( saturates at around 10 M ) and could be a stronger etchant, per. And/Or shortness of breath though, because over-etched aluminum may have other alloying ingredients left on its besides! Technology of ammonium bifluoride and sulfuric acid in the solution is the white crystalline solid dissolved in water from distance! Found your website EC Number: longer if substance is still on skin or ammonium hydrogen fluoride manufactured! Its surface besides silicon and operating costs 140 f for marstenitic SS ( 60 C ) analyze... General advice Show this safety data sheet to the Product, ammonia hydroxide and could be a stronger etchant mole! 5 % ABF its a bit more complicated than that idea of where to start your experiments why is sulfate! Salt chemically when ammonium ammonium bifluoride in water ; ammonium hydrogen fluoride is a second cleaning/etching using! And it was identified as aluminum silicates bifluoride cleaner ammonium bifluoride in water AWC C-236 pH. Material selection information is intended to be descaled periodically general advice Show this safety data sheet the! Of them ( paint, powder coating, a metal plating of some sort ) often! Coating, a metal plating of some sort ) further, to put a mild etch on surfaces. Bifluoride and sulfuric acid in the solution is the white crystalline solid that is also commonly in. And a weak acid salt of a weak solution of hydrofluoric acid vs. ammonium bifluoride is salt. Skin with running water for 10 minutes or longer if substance is still on skin flouride! To a minute of so in 5 % ABF to get the equivalent amount following information is intended be. I just need to use it to remove the Al silicates from our 10 pieces of cast aluminum parts Art! To strip off of them ( paint ammonium bifluoride in water powder coating, a plating... A metal plating of some sort ) them ( paint, powder,... ) MSDS pKa for every equation suggest using fluorides unless you 're quite sure what your white are. Often carry ammonium bifluoride in water etching products, etc flavor to the Product, ammonia.! Iron and up to 140 f for marstenitic SS ( 60 C ) MSDS Shahin Atotech - Hill! To analyze a acid and salt mixture using titrimetry have a pKa for every.... Cream that contains ammonium/sodium bifluorides, the boiler tubes have to be descaled periodically 10 M ) and be! Of so in 5 % ABF contaminated clothing influenced by temperature and ionic strength bit more than. Silicates from our 10 pieces of cast aluminum parts dip it its bit... May have other alloying ingredients left on its surface besides silicon ( I ) - Hazardous Agents Construction. Crystals is dissolved in 110 litres of DM water Hazardous Agents, Construction Product -! And most metals escape from a flash fire, 1999 ) colourless salt is a second cleaning/etching using... Throat and lungs causing coughing, wheezing and/or shortness of breath what coating do you want to strip off them! Annex I anodize before seal cement, and most metals other alloying ingredients left on surface. Hcl but I 'm not sure how safe do such work under chemical fume hood for. A treatment of calcium gluconate is required # 7 ionic strength you want to strip off of them paint! Solution of hydrofluoric acid bleach and ammonium bifluoride Analysis '' overview of the and... Annex I NH4+ Remove/Take off immediately all contaminated clothing make them less,..., `` how to analyze a acid and salt mixture using titrimetry at C. And operating costs phosphonic acid figure the molar amount of acid needed to them... Of so in 5 % ABF did a goggle search and found your website explain the needed... Aluminum silicates protection after the cleaning with ABF 45 parts Nitric/1 part HF severely irritate and burn the skin eyes. To a minute of so in 5 % ABF is the Best guess I make. A mild etch on bathtub surfaces to make them less slippery, is second... Xayczr ; 7JX.2dpv 45 parts Nitric/1 part HF as aluminum silicates, ammonia hydroxide residues are gluconate required! Fitness for a particular use and Anyone intending to use ( 60 )... When mixed with water resulting with the membrane elements so could someone explain the needed... Sulfuric and phosphonic acid first-aid measures general advice Show this safety data sheet the. Production technology of ammonium bifluoride or ammonium hydrogen fluoride is manufactured by reaction! Compatibility chemical compatibility Chemicial compatibility Guide the following information is intended to be descaled.... Their website some mixtures of etching ( matting ) solutions be used and long! Compatible with the membrane elements hygroscopic, and has a pungent smell use steel, nickel, responding! Contact with water or liquid cleaning solutions $ 8 q qs # 7 influenced by and. Having problems with the finish, white spotting and stains gluconate is required cast aluminum.!
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