Sodium Fluoride, Natrium Fluorid, 7681-49-4

Sodium Fluoride, Natrium Fluorid, 7681-49-4

SODIUM FLUORIDE (NATRIUM FLUORIDE)

PRODUCT IDENTIFIER INFORMATION

CHEMICAL STRUCTURE

    Na⁺  F⁻
    
    Sodium Fluoride (NaF)
    Ionic Structure

Sodium Fluoride Molecular Structure

Molecular Formula: NaF
SMILES: [F-].[Na+]
InChI: 1S/FH.Na/h1H;/q;+1/p-1
Crystal System: Cubic (tetragonal)

SECTION 1: CHEMICAL IDENTITY AND DESCRIPTION

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 3: CHEMICAL PROPERTIES AND REACTIVITY

SECTION 4: PRODUCTION METHODS

Method 1: Neutralization Method (Most Common)

Reaction:

Na₂CO₃ + 2HF → 2NaF + H₂O + CO₂
or
NaOH + HF → NaF + H₂O

Process:

• Soda ash or caustic soda solution is added to hydrofluoric acid

• Neutralization is carried out to pH 8-9

• Product is obtained by crystallization, centrifugation and drying

Method 2: Fluorosilicic Acid - Soda Ash Method

Reaction (One-Step):

H₂SiF₆ + 3Na₂CO₃ + (x-1)H₂O → SiO₂·xH₂O + 6NaF + 3CO₂

Process Notes:

• Soda ash/fluorosilicic acid molar ratio: n(Na₂CO₃)/n(H₂SiF₆) = 6.0

• Reaction temperature: 90-95°C

• Reaction time: 90-120 minutes

• pH: 5.0-5.5

Method 3: Ammonium Fluoride - Soda Ash Method

Reaction:

Na₂CO₃ + 2NH₄F → 2NaF + CO₂ + 2NH₃

Method 4: Leaching Method (Old Method)

Reaction:

CaF₂ + Na₂CO₃ + SiO₂ → 2NaF + CaSiO₃ + CO₂

Process:

• Fluorite, soda ash and quartz sand are calcined at 800-900°C

• Leached with water

• Evaporation, crystallization and drying to obtain product

SECTION 5: FUNCTIONAL PROPERTIES AND MECHANISM OF ACTION

SECTION 6: MAIN APPLICATION AREAS

SECTION 7: QUALITY SPECIFICATIONS (TECHNICAL GRADE)

SECTION 8: TOXICOLOGICAL PROFILE

SECTION 9: GHS CLASSIFICATION AND LABELING

GHS Classification (according to 1272/2008/EC and UN GHS):

Signal Word: DANGER

Hazard Pictograms: GHS06 (Skull and Crossbones), GHS07 (Exclamation Mark), GHS09 (Environment)

Hazard Statements (H-Codes):

Risk Codes:

Safety Descriptions:

NFPA 704 Hazard Classification:

SECTION 10: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 11: FIRST AID MEASURES

SECTION 12: FIRE-FIGHTING MEASURES

SECTION 13: STORAGE AND SHELF LIFE

SECTION 14: PACKAGING OPTIONS

SECTION 15: TRANSPORT INFORMATION

SECTION 16: REGULATORY STATUS

SECTION 17: OTHER NAMES AND SYNONYMS

SECTION 18: INDUSTRY APPLICATION FORMULATIONS

SECTION 19: ALTERNATIVES COMPARISON TABLE

SECTION 20: SUMMARY TABLE

SECTION 21: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• Toxic if swallowed (H301). Adults: 5-10 g single dose may be fatal; Children: 5 mg/kg body weight may be fatal.

• Causes skin irritation (H315). Use chemical-resistant gloves.

• Causes serious eye irritation (H319). Use safety goggles and face shield.

• Harmful if inhaled (H332). Use adequate ventilation and respiratory protection.

• Causes damage to organs through prolonged exposure (H372). Monitor exposure levels.

• Contact with acids liberates highly toxic hydrogen fluoride (HF) gas. Never mix with acids.

• Corrodes glass. Do not store in glass containers; use plastic containers.

• Hygroscopic (absorbs moisture). Store in tightly closed containers.

• Incompatibilities: Mineral acids, strong acids, oxidizers, glass, silica.

BEST PRACTICE RECOMMENDATIONS:

• Dentistry: Use at 0.1-0.5% NaF concentration in toothpastes; 0.22-1.1% NaF for professional use (prescription); control use in children; prevent ingestion.

• Water Treatment: Use for drinking water fluoridation at 0.7-1.2 mg/L; WHO limit 1.5 mg/L; continuous monitoring required; comply with local regulations.

• Metallurgy: Use in flux mixtures to increase welding strength; typical use 1-5%; ensure adequate ventilation.

• Wood Preservation: Impregnate with 1-3% NaF solution; effective at low concentrations.

• Handling: Use in well-ventilated areas or under fume hood; wear chemical-resistant gloves, safety goggles, face shield, and appropriate respiratory protection; avoid creating dust.

• Storage: Store in tightly closed, properly labeled plastic containers in dry conditions; keep away from heat, acids, and glass; store at 2-8°C.

• Spill Response: Avoid creating dust; wear full PPE; vacuum or wet sweep; place in sealed containers for disposal; do not use acids (releases HF gas).

• Disposal: Dispose of in accordance with local, regional, and national regulations; do not discharge into drains or water bodies; fluoride compounds are regulated as hazardous waste.

LEGAL DISCLAIMER:

The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, it does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing the suitability of the product for their specific applications. For complete safety, storage, use, handling, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.