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Ammonium fluoride
Property |
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Boiling point : |
65°C/760mmHg |
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density : |
1.11 g/mL at 20 °C
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storage temp. : |
Store at RT. |
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solubility : |
H2O: 1 M at 20 °C, clear, colorless
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Water Solubility : |
soluble |
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Stability:: |
Stable. Incompatible with strong oxidizing agents, water, most common metals, strong bases, strong acids. Attacks glass. |
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SAFETY
- Risk and Safety Statements
- Hazard and Precautionary Statements (GHS)
| Symbol(GHS): |
 
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| Signal word: |
Danger |
| Hazard statements: |
| Code |
Hazard statements |
Hazard class |
Category |
Signal word |
Pictogram |
P-Codes |
| H301 |
Toxic if swalloed |
Acute toxicity,oral |
Category 3 |
Danger |
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P264, P270, P301+P310, P321, P330,P405, P501 |
| H311 |
Toxic in contact with skin |
Acute toxicity,dermal |
Category 3 |
Danger |
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P280, P302+P352, P312, P322, P361,P363, P405, P501 |
| H318 |
Causes serious eye damage |
Serious eye damage/eye irritation |
Category 1 |
Danger |
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P280, P305+P351+P338, P310 |
| H331 |
Toxic if inhaled |
Acute toxicity,inhalation |
Category 3 |
Danger |
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P261, P271, P304+P340, P311, P321,P403+P233, P405, P501 |
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| Precautionary statements: |
| P261 |
Avoid breathing dust/fume/gas/mist/vapours/spray. |
| P280 |
Wear protective gloves/protective clothing/eye protection/face protection. |
| P304+P340 |
IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. |
| P405 |
Store locked up. |
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Ammonium fluoride
Chemical Properties,Usage,Production
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Ammonium hydrogen fluoride
At room temperature, ammonium hydrogen fluoride appears as white or colorless orthorhombic crystal with slight sour. It is poisonous! It is slightly soluble in alcohol, easily soluble in cold water while subjecting to decomposition in hot water. Its aqueous solution is strongly acidic. It is obtained through the neutralization between the anhydrous hydrofluoric acid and ammonia. It can corrode glass and is corrosive to the skin. It can be used as a chemical reagent, glass etching agent (with participation of hydrofluoric acid), disinfectants and preservatives in fermentation industry, solvent for making metal beryllium via beryllium oxide and surface treatment agent of silicon steel sheet. It can also be used for the manufacturing of ceramics, magnesium alloy, the cleaning and scaling of boiler feed water systems and steam generating system as well as the acid treatment agent for oil sand. It is also used as the component of alkylation and isomerization catalyst.
The production process of ammonium hydrogen fluoride is generally first generating ammonium fluoride followed by further sending through hydrogen fluoride to generate ammonium hydrogen fluoride. If not properly managed, it will become a mixture of ammonium fluoride and ammonium hydrogen fluoride with ammonium fluoride being easily decomposed into ammonium hydrogen fluoride.
This information is edited by Xiongfeng Dai from Chemicalbook.
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Toxicity
This product is toxic. The operator must wear protective equipment. See the remaining protective measures in the part of ammonium hydrogen fluoride.
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Chemical Properties
It appears as colorless phyllodes or needle-like crystals and forms hexagonal columnar crystals after being subject to sublimation. It is easily deliquescent. It is easily soluble in water with aqueous solution being acidic. It is soluble in alcohol but insoluble in acetone and liquid ammonia.
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Uses
It can be used as glass etching agent, the chemical polishing agent on the metal surface, preservatives and disinfectants of brewing and fiber mordant as well as for extracting rare metals.
It can be used as reagents for the analysis, masking agents and preservatives.
It can be applied to wood preservation, glass engraving and precipitation agent for the complexometric titration of the aluminum, extraction of rare elements as well as spot analysis of zirconium.
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Production method
Liquid-phase method: to lead or plastic container, put certain amount of hydrofluoric acid. Cool water in the outer container and slowly introduce ammonia gas under stirring until the pH value of reaction solution reaches about 4. The reaction liquid further goes through cooling and crystallization, centrifugation, air drying to obtain ammonium fluoride products.
NH3 + HF → NHF
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Acute toxicity
Intraperitoneal-rat LD50: 31 mg/kg; subcutaneous-Fox LDL0: 280 mg/kg.
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Storage characteristics
Treasury: ventilation, low-temperature and drying; store it separately from acids, bases, food and CLF3.
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Chemical Properties
white crystals |
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Definition
ChEBI: A fluoride salt having ammonium (NH4+) as the counterion. |
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General Description
Ammonium fluoride is a white crystalline solid. Ammonium fluoride is soluble in water. Ammonium fluoride is noncombustible. Ammonium fluoride is corrosive to aluminum. Ammonium fluoride is used in chemical analysis, in brewing, and as a preservative for wood. |
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Air & Water Reactions
Dissolves in water and forms dilute solution of hydrofluoric acid. May corrode glass, cement, and most metals [USCG, 1999]. Water soluble. |
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Reactivity Profile
Salts, basic, such as Ammonium fluoride, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. |
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Health Hazard
Inhalation of dust may cause irritation of respiratory system. Ingestion is harmful; readily soluble fluorides may be fatal if relatively small quantities are swallowed. Contact with eyes causes local irritation of the mucous membrane. Contact with skin may cause burns. High concs. of fluorine in the urine have been reported following skin contact. |
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Ammonium fluoride
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