| Identification | More | [Name]
Ammonium hydrogen difluoride | [CAS]
1341-49-7 | [Synonyms]
AMMOMIUM FLUORIDE ACIDIC
AMMONIUM ACID FLUORIDE
AMMONIUM BIFLUORIDE
Ammonium difluoride
AMMONIUM FLUORIDE, ACIDIC
AMMONIUM HYDROGEN DIFLUORIDE
AMMONIUM HYDROGEN FLUORIDE
ETCHING POWDER
acidammoniumfluoride
ammoniumbifluoride,solid
ammoniumbifluoride,solution
ammoniumfluoride((nh4)(hf2))
ammoniumfluoridecomp.withhydrogenfluoride(1:1)
ammoniumfluoridecompwithhydrogenfluoride(1:1)
ammoniumhydrofluoride
ammoniumhydrogenbifluoride
fluorureacided’ammonium(french)
Ammonium fluoride, acid
Ammonium hydrogen difluoride
Ammonium bifluoride
Ammonium fluoride, acid
Ammonium bifluoride (NH4HF2) | [EINECS(EC#)]
215-676-4 | [Molecular Formula]
F2H5N | [MDL Number]
MFCD00012018 | [Molecular Weight]
57.04 | [MOL File]
1341-49-7.mol |
| Chemical Properties | Back Directory | [Appearance]
white scales or flakes | [Melting point ]
125 °C(lit.)
| [Boiling point ]
230 °C
| [density ]
1,5 g/cm3 | [vapor pressure ]
1 hPa (20 °C) | [Fp ]
238°C | [storage temp. ]
Store at room temperature. | [solubility ]
630g/l | [form ]
Solid | [pka]
6.3[at 20 ℃] | [color ]
White | [Specific Gravity]
1.5 | [Odor]
acidic odor | [PH]
2 (5.7g/l, H2O, 20℃) | [Water Solubility ]
630 g/L (20 ºC) | [Sensitive ]
Hygroscopic | [Merck ]
14,498 | [Exposure limits]
ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 | [Stability:]
hygroscopic | [InChIKey]
KVBCYCWRDBDGBG-UHFFFAOYSA-N | [CAS DataBase Reference]
1341-49-7(CAS DataBase Reference) | [EPA Substance Registry System]
1341-49-7(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
T,C | [Risk Statements ]
R25:Toxic if swallowed.
R34:Causes burns. | [Safety Statements ]
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 label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
UN 1727 8/PG 2
| [WGK Germany ]
1
| [RTECS ]
BQ9200000
| [F ]
3-9 | [Hazard Note ]
Toxic/Corrosive/Hygroscopic | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
28261900 | [Safety Profile]
Caustic poison and strong irritant by all routes. See also HYDROFLUORIC ACID. When heated to decomposition it emits very toxic fumes of F-, NO,, and NH3. | [Hazardous Substances Data]
1341-49-7(Hazardous Substances Data) |
| Hazard Information | Back Directory | [General Description]
Ammonium bifluoride solution is the white crystalline solid dissolved in water. AMMONIUM BIFLUORIDE, SOLUTION(1341-49-7) is corrosive to metals and tissue. AMMONIUM BIFLUORIDE, SOLUTION(1341-49-7) is used in ceramics. | [Reactivity Profile]
AMMONIUM BIFLUORIDE reacts violently with bases. In presence of moisture will corrode glass, cement, and most metals. Flammable hydrogen gas may collect in enclosed spaces. Do not use steel, nickel, or aluminum containers [USCG, 1999]. | [Air & Water Reactions]
Dissolves in water and forms a weak solution of hydrofluoric acid. | [Hazard]
Corrosive to skin. | [Health Hazard]
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | [Potential Exposure]
It is used as a sterilizer, in dairy and
brewery operations; in the ceramic, glass, and electroplating
industries; as a laundry sour. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. | [First aid]
Move victim to fresh air. Call 911 or emergency
medical service. Give artificial respiration if victim is not
breathing. Do not use mouth-to-mouth method if victim
ingested or inhaled the substance; give artificial respiration
with the aid of a pocket mask equipped with a one-way
valve or other proper respiratory medical device.Administer oxygen if breathing is difficult. Remove and isolate
contaminated clothing and shoes. In case of contact with
substance, immediately flush skin or eyes with running
water for at least 20 minutes. For minor skin contact, avoid
spreading material on unaffected skin. Keep victim warm
and quiet. Effects of exposure (inhalation, ingestion or skin
contact) to substance may be delayed. Ensure that medical
personnel are aware of the material(s) involved and take precautions
to protect themselves. Medical observation is
recommended for 24 to 48 hours after breathing overexposure,
as pulmonary edema may be delayed. As first aid for
pulmonary edema, a doctor or authorized paramedic may
consider administering a drug or other inhalation therapy. | [Shipping]
Administer oxygen if breathing is difficult. Remove and isolate
contaminated clothing and shoes. In case of contact with
substance, immediately flush skin or eyes with running
water for at least 20 minutes. For minor skin contact, avoid
spreading material on unaffected skin. Keep victim warm
and quiet. Effects of exposure (inhalation, ingestion or skin
contact) to substance may be delayed. Ensure that medical
personnel are aware of the material(s) involved and take precautions
to protect themselves. Medical observation is
recommended for 24 to 48 hours after breathing overexposure,
as pulmonary edema may be delayed. As first aid for
pulmonary edema, a doctor or authorized paramedic may
consider administering a drug or other inhalation therapy. | [Incompatibilities]
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions.
Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. In the presence of moisture
corrodes concrete, metals, glass. | [Chemical Properties]
Ammonium bifluoride. | [Chemical Properties]
white scales or flakes, also referred to asammonium hydrogen fluoride, anunonium difluoride and anunonium acid fluoride.
| [Waste Disposal]
May be buried in a specially
designated chemical landfill. Aqueous wastes may be reacted with an excess of lime followed by lagooning and
either recovery or land disposal of the separated calcium
fluoride. | [Physical properties]
Orthorhombic or tetragonal crystals; etches glass; deliquescent; density 1.50 g/cm3; refractive index 1.390; melts at 125.6°C; very soluble in water; slightly soluble in alcohol. | [Uses]
In manufacture of Mg and Mg alloys; in brightening of Al; for purifying and cleansing various parts of beer-dispensing apparatus, tubes, etc., sterilizing dairy and other food equipment; in glass and porcelain industries; as mordant for aluminum; as a "sour" in laundering cloth. In lab production of HF. | [Flammability and Explosibility]
Nonflammable | [Properties and Applications]
Ammonium hydrogen difluoride (NH4HF2) is an inexpensive reagent compared to known anticaries fluorides such as NaF, SnF2, etc. In addition, ammonium bifluoride is reported as a potent inhibitor of caries-like lesion formation in vitro. For instance, Tyler and Poole have studied fluoride uptake by human surface enamel from ammonium bifluoride in vitro. They noticed a reduction in the penetration of caries-like lesions in the case of specimens treated with 1% aq. NH4HF2. A study reports the fluorination of hydroxyapatite powder using ammonium hydrogen difluoride as a fluorinating agent by three different routes, viz., solid-state method, reflux method, and pH cycle method. The FT-IR and powder XRD results confirm the inter-diffusion of ‘F’ and ‘OH’- ions and the formation of homogeneous products of partially fluorinated hydroxyapatite. Compared to many other fluoride sources, NH4HF2 has the advantages of solubility and cost[1].
| [References]
[1] V. Geetha, G. Buvaneswari. “Ammonium hydrogen difluoride induced fluorination of hydroxyapatite.” Materials Research Bulletin 45 12 (2010): Pages 1866-1870. |
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