Ammonium fluoride

CAS Number
12125-01-8
EC Number
235-185-9

What is Ammonium fluoride?

Ammonium fluoride (CAS 12125-01-8), also referenced industrially as NH4F, is an inorganic fluoride salt used as a buffering agent, surface treatment chemical, and flame retardant.

Where is Ammonium fluoride used?

  • Electronics: semiconductor wet etching and wafer cleaning formulations
  • Textile and leather: mordant and surface conditioner for dye uptake and substrate uniformity
  • Paper: flame retardant additive that reduces combustibility
  • Building and construction: masonry treatments and cement formulations
  • It provides controlled fluoride release for precise pH management or selective etching action.

Commercial specifications

  • Technical and industrial grades, purity typically 98% upward for solid material
  • Bulk quantities and smaller packaging options for laboratory and specialty formulation use

Other Names (Synonyms)

NH4F|Ammonium fluoride ((NH4)F)|Fluoruro amonico|Ammonium fluorure|Neutral ammonium fluoride|Fluorure d'ammonium|Fluorek amonowy|4QT928IM0A

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What are the physical properties of Ammonium fluoride?

Melting Point 238 °C
Boiling Point 65°C/760mmHg
Density 1.015 g/cm³
Appearance Ammonium fluoride is a white crystalline solid.
Color White
Odor Odorless
Form Powder/Solid
Water Solubility soluble
Vapor Pressure 0Pa at 25℃
pH 6 (50g/l, H2O, 20℃)
Log P -4.37 at 25℃

How is Ammonium fluoride classified and handled safely? Learn More

Danger
GHS06· Toxic GHS05· Corrosive GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H301 Toxic if swallowed
H311 Toxic in contact with skin
H314 Causes severe skin burns and eye damage
H318 Causes serious eye damage

Precautionary Statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash … thoroughly after handling.

Which trade and regulatory codes apply to Ammonium fluoride?

HS Code 28261910
UN Number 2505
ADR Class 6.1
Packing Group III
Storage Class 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects
WGK (Germany) 1
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