ChemicalBook > CAS DataBase List > Ammonium hydrogen difluoride

Ammonium hydrogen difluoride

Product Name
Ammonium hydrogen difluoride
CAS No.
1341-49-7
Chemical Name
Ammonium hydrogen difluoride
Synonyms
AMMONIUM BIFLUORIDE;NH4HF2;Ammonium Biflouride;AMMONIUM HYDROGEN FLUORIDE;en fL;Flammon;ETCHING POWDER;Ammonium difluoride;AMONIUM BI FLUORIDE;acidammoniumfluoride
CBNumber
CB0273686
Molecular Formula
F2H5N
Formula Weight
57.04
MOL File
1341-49-7.mol
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Ammonium hydrogen difluoride Property

Melting point:
125 °C(lit.)
Boiling point:
230 °C
Density 
1,5 g/cm3
vapor pressure 
1 hPa (20 °C)
Flash point:
238°C
storage temp. 
Store at room temperature.
solubility 
630g/l
form 
Solid
pka
6.3[at 20 ℃]
color 
White
Specific Gravity
1.5
PH
2 (5.7g/l, H2O, 20℃)
Odor
acidic odor
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
Ammonium bifluoride (1341-49-7)
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Safety

Hazard Codes 
T,C
Risk Statements 
25-34
Safety Statements 
22-26-37-45-36/37/39
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 
28261910
Hazardous Substances Data
1341-49-7(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H301Toxic if swalloed

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
AX1235
Product name
Ammonium Bifluoride
Purity
Practical
Packaging
500g
Price
$113
Updated
2024/03/01
Sigma-Aldrich
Product number
AX1235
Product name
Ammonium Bifluoride
Purity
Practical
Packaging
12kg
Price
$624
Updated
2024/03/01
Sigma-Aldrich
Product number
224820
Product name
Ammonium hydrogen difluoride
Purity
reagent grade, 95%
Packaging
25g
Price
$59.9
Updated
2024/03/01
Sigma-Aldrich
Product number
224820
Product name
Ammonium hydrogen difluoride
Purity
reagent grade, 95%
Packaging
2.5kg
Price
$526
Updated
2024/03/01
Alfa Aesar
Product number
014660
Product name
Ammonium hydrogen fluoride, tech. 95%
Packaging
500g
Price
$56.4
Updated
2023/06/20
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Ammonium hydrogen difluoride Chemical Properties,Usage,Production

Chemical Properties

Ammonium bifluoride.

Chemical Properties

white scales or flakes, also referred to asammonium hydrogen fluoride, anunonium difluoride and anunonium acid 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

Ammonium hydrogen fluoride is used as a chemical reagent in analysis and an antiseptic. It is also used in ceramics, electroplating, component of glass etchants as well as food processing equipment disinfectant. It acts as an intermediate in the production of hydrofluoric acid from hexafluorosilicic acid.

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.

General Description

Ammonium bifluoride solution is the white crystalline solid dissolved in water. Ammonium hydrogen difluoride is corrosive to metals and tissue. Ammonium hydrogen difluoride is used in ceramics.

Air & Water Reactions

Dissolves in water and forms a weak solution of hydrofluoric acid.

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].

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.

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.

Flammability and Explosibility

Non flammable

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.

Potential Exposure

It is used as a sterilizer, in dairy and brewery operations; in the ceramic, glass, and electroplating industries; as a laundry sour.

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.

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].

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.

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.

References

[1] V. Geetha, G. Buvaneswari. “Ammonium hydrogen difluoride induced fluorination of hydroxyapatite.” Materials Research Bulletin 45 12 (2010): Pages 1866-1870.

Ammonium hydrogen difluoride Preparation Products And Raw materials

Raw materials

Congo Red Ammonium hydroxide Hydrogen fluoride Ammonia

Preparation Products

Fluorine fluxing agent
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View Lastest Price from Ammonium hydrogen difluoride manufacturers

Hebei Chuanghai Biotechnology Co., Ltd
Product
Ammonium hydrogen difluoride 1341-49-7
Price
US $9.90/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 mt
Release date
2024-10-31
Yingke New Materials Co., Ltd
Product
Ammonium Bifluoride NH?HF? 1341-49-7
Price
US $0.00-0.00/BAG
Min. Order
1BAG
Purity
≥98%
Supply Ability
1000 Tons
Release date
2024-10-13
Yingke New Materials Co., Ltd
Product
Ammonium Bifluoride 1341-49-7
Price
US $0.00-0.00/BAG
Min. Order
1BAG
Purity
≥98%
Supply Ability
1000 Tons
Release date
2024-10-14

1341-49-7, Ammonium hydrogen difluorideRelated Search:

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