Salts & Minerals
REACH
Sodium bifluoride
CAS Number
1333-83-1
EC Number
215-608-3
What is Sodium bifluoride?
Sodium bifluoride (CAS 1333-83-1), also sold as sodium acid fluoride, is an inorganic fluoride salt used industrially as a pH buffer, mild acidic flux, and surface treatment agent.
Where is Sodium bifluoride used?
- Metal finishing and mining: pickling agent
- Metal surfaces: removing oxide scale and preparing for coating
- Textile and leather processing: bath pH adjustment and dye uptake uniformity
- Building and construction: hardening and anti-efflorescence treatment for concrete and masonry
- Water treatment: fluoride ion source for controlled dosing and pH correction in industrial effluent
- It releases fluoride in a controlled way for etching, cleaning, and corrosion inhibition.
Commercial specifications
- Technical grade, purity typically 98% or higher
- Packaging from small bags to bulk quantities
Other Names (Synonyms)
SODIUM HYDROGEN DIFLUORIDE|Sodium acid fluoride|Sodium hydrogen fluoride|Caswell No. 747A|SODIUM DIFLUORIDE|Fluoruro acido de sodio|Sodium fluoride (Na(HF2))
What are the physical properties of Sodium bifluoride?
Melting Point >68 °C (dec.)
Boiling Point 270°C[at 101 325 Pa]
Density 2.08 g/cm³
Appearance White, crystalline powder.Sol- uble in water; decomposes on heating.
Color white hexagonal, hexane crystals, crystalline
Form pellets
Water Solubility g/100g solution in H2O: 3.7 (20°C), 16.4 (80°C) [KIR78]
Vapor Pressure 0.01Pa at 20℃
Log P 1.26 at 20℃
How is Sodium bifluoride classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS06· Toxic GHS08· Health Hazard
Hazard Statements
H301 Toxic if swallowed
H314 Causes severe skin burns and eye damage
H318 Causes serious eye damage
H370 Causes damage to organs
H372 Causes damage to organs through prolonged or repeated exposure
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Sodium bifluoride?
HS Code 2826199090
UN Number 2439
ADR Class 8
Packing Group II
Storage Class 6.1D - Non-combustible acute toxic Cat.3
toxic hazardous materials or hazardous materials causing chronic effects
WGK (Germany) 1