AMMONIUM HYDROGEN FLUORIDE
Ammonium bifluoride
CAS: 1341-49-7
Molecular Formula: F2H5N
AMMONIUM HYDROGEN FLUORIDE - Names and Identifiers
| Name | Ammonium bifluoride |
| Synonyms | ETCHING POWDER Ammonium bifluoride AMMONIUM BIFLUORIDE acidammoniumfluoride ammoniumhydrofluoride ammoniumbifluoride,solid Ammonium Hydrogenfluoride ammoniumhydrogenbifluoride AMMONIUM HYDROGEN FLUORIDE Ammonium bifluoride-crystal ammoniumbifluoride,solution Ammonium hydrogen difluoride ammoniumfluoride((nh4)(hf2)) fluorureacided'ammonium(french) |
| CAS | 1341-49-7 |
| EINECS | 215-676-4 |
| InChI | InChI=1/FH.H3N/h1H;1H3/p+1 |
| InChIKey | KVBCYCWRDBDGBG-UHFFFAOYSA-N |
AMMONIUM HYDROGEN FLUORIDE - Physico-chemical Properties
| Molecular Formula | F2H5N |
| Molar Mass | 57.04 |
| Density | 1,5 g/cm3 |
| Melting Point | 125°C(lit.) |
| Boling Point | 230 °C |
| Flash Point | 238°C |
| Water Solubility | 630 g/L (20 ºC) |
| Solubility | 630g/l |
| Vapor Presure | 1 hPa (20 °C) |
| Appearance | Solid |
| Specific Gravity | 1.5 |
| Color | White |
| Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
| Merck | 14,498 |
| pKa | 6.3[at 20 ℃] |
| PH | 2 (5.7g/l, H2O, 20℃) |
| Storage Condition | Store at room temperature. |
| Stability | hygroscopic |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | The character is white or colorless transparent orthorhombic crystal system, the commodity is flaky, slightly sour taste. melting point 125.6 ℃ boiling point 240 ℃ relative density 1.52 solubility slightly soluble in alcohol, very soluble in cold water, decomposition in hot water. It was strongly acidic when dissolved in water. |
| Use | Used as a glass etchant, disinfectant, antiseptic, metal beryllium solvent, surface treatment agent for silicon steel plate, also used in the manufacture of ceramics and magnesium alloys |
AMMONIUM HYDROGEN FLUORIDE - Risk and Safety
| Risk Codes | R25 - Toxic if swallowed R34 - Causes burns |
| Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37 - Wear suitable gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 1727 8/PG 2 |
| WGK Germany | 1 |
| RTECS | BQ9200000 |
| FLUKA BRAND F CODES | 3-9 |
| TSCA | Yes |
| HS Code | 28261910 |
| Hazard Note | Toxic/Corrosive/Hygroscopic |
| Hazard Class | 8 |
| Packing Group | II |
AMMONIUM HYDROGEN FLUORIDE - Upstream Downstream Industry
| Raw Materials | Ammonium hydroxide Hydrofluoric Acid Hydrofluoric Acid Hydrofluoric Acid Hydrofluoric Acid Ammonia |
AMMONIUM HYDROGEN FLUORIDE - Nature
Open Data Verified Data
colorless orthorhombic or flaky crystals with slightly sour taste. Melting point 124.6 degrees C; Relative density of 1.5. Deliquescence in air. Soluble in water, aqueous solution was acidic reaction. Slightly soluble in ethanol. When heated or hot water decomposition. Corrosive to glass. Non-combustible, irritating. Thermal decomposition, release of toxic nitrogen oxides and fluoride smoke. Sublimation is possible at higher temperatures.
Last Update：2025-06-10 22:55:16
AMMONIUM HYDROGEN FLUORIDE - Preparation Method
Open Data Verified Data
40% hydrofluoric acid was placed in a platinum dish or Teflon container. Ammonia gas was introduced until the solution began to turn brown to Congo red paper. With ice-cooling, namely the precipitation of crystals. The mother liquor was filtered off by suction to obtain pure ammonium hydrogen fluoride.
Last Update：2025-06-10 22:55:16
AMMONIUM HYDROGEN FLUORIDE - Application
Open Data Verified Data
reagents for chemical analysis. It is used as a glass etchant in the production of ground glass, fermentation industry Disinfection and a surface treatment agent for preservatives and silicon steel plates. It is also used for cleaning and descaling of ceramics, magnesium alloys, boiler feed water systems and steam generating systems, and acidizing treatment in oilfield sand plants.
Last Update：2025-08-19 16:24:40
AMMONIUM HYDROGEN FLUORIDE - Safety
Open Data Verified Data
toxic! Corrosive, the solution can corrode glass. It is irritating to the skin and mucous membrane, and the staff should be protected. Mixed loading and transportation with acids and edible chemicals are strictly prohibited. Foam, carbon dioxide, dry powder, sand.
Last Update：2025-06-10 22:55:16
AMMONIUM HYDROGEN FLUORIDE - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxicity | This product is toxic. Protective gear must be worn by the operator. If you accidentally touch the skin, you should immediately rinse with plenty of water, and then the affected area is soaked in 70% ice ethanol or ice cold magnesium sulfate solution for 30min, and then coated with magnesium oxide glycerin ointment. Pay special attention to the skin under the nails, if not timely cleaning treatment, can lead to severe pain. |
| Use | used as a glass etchant, disinfectant, preservative, metal beryllium solvent, surface treatment agent for silicon steel plate, also used in the manufacture of ceramics and magnesium alloys can be used as a chemical reagent, glass etchant (often used in combination with hydrofluoric acid), industrial disinfectant and antiseptic fermentation, beryllium metal from beryllium oxide solvent, and a surface treatment agent for the silicon steel sheet. It is also used in the manufacture of ceramics, magnesium alloys, the cleaning and descaling of boiler water supply systems and steam generation systems, and the acidification of oilfield sand. It is also used as an alkylation, isomerization catalyst component. It is used for acidizing treatment in oil field and manufacturing magnesium and magnesium alloys. It is used as a matting, defrosting, etchant for glass, as a protective agent for wood, as a brightening agent for aluminum, as a rust remover for the textile industry, and as an analytical reagent for electroplating, electronic industry, etc. use as an analytical reagent and as a bacterial inhibitor analytical reagent. Used for ceramic and glass surface etching. Appliance Disinfection. Preparation of hydrogen fluoride in the laboratory. Electroplating. |
| production method | neutralization method in a container made of lead or plastic, anhydrous hydrofluoric acid, mixed with circulating mother liquor, it was cooled with cold water in the container jacket, and then allowed to fully react by slowly and intermittently passing through the liquid ammonia in a fine flow and continuously stirring. At any time during the operation, Congo red reagent was used for determination. When the end point of the reagent was Brown, liquid ammonia was stopped. The reaction solution is evaporated and concentrated until the liquid surface shows a crystalline membrane, then cooled to crystallize, and centrifuged to prepare ammonium hydrogen fluoride product, NH3 2HF → NH4HF2 |
| category | corrosive article |
| toxicity grade | high toxicity |
| Acute toxicity | Reference range: intraperitoneal-rat LD50: 31 mg/kg; Subcutaneous-Fox LDL0: 280 mg/kg |
| flammability hazard characteristics | decomposition of toxic fluoride in case of moisture and water, nitrogen oxides and ammonia gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from alkali |
| extinguishing agent | water mist |
| Occupational Standard | TWA 2.5 mg (fluorine)/m3; PEL 5 mg (fluorine)/M3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:41:30
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Raw Materials for AMMONIUM HYDROGEN FLUORIDE