Sodium fluoride

FNa

sodium fluoride

CAS7681-49-4
GHS06 Gefahrensymbol: Giftig – Totenkopf mit Knochen
Danger

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Identification

CAS Number
7681-49-4
EC Number
231-667-8
UN Number
1690
Index Number
009-004-00-7
PubChem CID
5235

Physical-chemical properties

Molecular Formula
FNa
Molar Mass
41.99 g/mol
IUPAC Name
sodium fluoride

Chemical Identifiers

InChI
InChI=1S/FH.Na/h1H;/q;+1/p-1
InChI Key
PUZPDOWCWNUUKD-UHFFFAOYSA-M

Overview

Sodium fluoride (CAS 7681-49-4) is an inorganic fluoride salt with high solubility and notable toxicological properties. This white crystalline compound represents one of the most commercially significant fluoride compounds in industrial chemistry. With the molecular formula FNa and a molecular weight of 41.99 g/mol, sodium fluoride exhibits excellent water solubility and forms clear, colorless solutions. The compound crystallizes in a cubic structure and demonstrates remarkable chemical stability under normal storage conditions. From a safety perspective, sodium fluoride carries significant hazard classifications requiring careful handling protocols. Classified under GHS06 pictogram with a "Danger" signal word, it presents acute toxicity risks (Acute Tox. 3) and causes skin and eye irritation (categories 2). The ADR classification 6.1 reflects its toxic nature, necessitating specialized transport procedures and comprehensive safety training for personnel. Proper personal protective equipment, including chemical-resistant gloves and eye protection, remains essential during handling operations. Industrial applications of sodium fluoride span multiple sectors, with water fluoridation representing its most widely recognized use in municipal treatment facilities. The metallurgical industry employs sodium fluoride as a flux in aluminum and steel production, where its properties facilitate the removal of oxides and improve metal quality. Additionally, the compound serves as an intermediate in the synthesis of various fluorinated compounds, sometimes alongside other industrial chemicals like N-methylaniline in specialized chemical processes. The pharmaceutical and agricultural sectors also utilize sodium fluoride in specific formulations, though regulatory compliance requirements vary significantly across European markets. Glass and ceramic manufacturing represents another important application area, where sodium fluoride functions as an opacifying agent. OYSI maintains reliable supply chains for high-purity sodium fluoride, ensuring consistent availability for European industrial customers requiring this essential fluoride compound.

Safety & Classification

Danger
Classification:

Acute Tox. 3 *; Skin Irrit. 2; Eye Irrit. 2

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H301

Toxic if swallowed.

H315

Causes skin irritation.

H319

Causes serious eye irritation.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Skin Contact

Irritant

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Eye Contact

Irritant

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

Ingestion

Toxic

Measures if substance is accidentally swallowed

First Aid Actions

  • +P301IF SWALLOWED:
  • +P330Rinse mouth.
  • +P331Do NOT induce vomiting.
  • +P310Immediately call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1690
ADR Class6.1
Packing GroupIII
Tunnel CodeE
Proper Shipping NameNatriumfluorid, fest
Marine PollutantNo

Frequently Asked Questions

What is sodium fluoride?

Sodium fluoride is an inorganic chemical compound with the formula FNa and CAS number 7681-49-4. This white crystalline salt has a molecular weight of 41.99 g/mol and serves as an important source of fluoride ions in various industrial and commercial applications. It is classified as a hazardous substance with acute toxicity properties and requires careful handling due to its potential health risks upon exposure.

What are the physicochemical properties of sodium fluoride?

Sodium fluoride is a white, odorless crystalline powder that is highly soluble in water. It has a molecular formula of FNa with a molecular weight of 41.9881724 g/mol. The compound is stable under normal conditions but can release toxic hydrogen fluoride gas when exposed to acids. It has a melting point of approximately 993°C and exhibits good thermal stability in dry conditions.

What is sodium fluoride used for?

Sodium fluoride is primarily used in dental care products, water fluoridation systems, and as a preservative in wood treatment. Industrial applications include metal surface treatment, glass etching, and as a flux in metallurgy. It also serves as a pesticide and insecticide in agricultural applications, and as a laboratory reagent in analytical chemistry and research applications.

How to handle sodium fluoride safely?

Sodium fluoride requires careful handling with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work in well-ventilated areas to avoid inhalation of dust particles. The substance is classified as Acute Tox. 3 with skin and eye irritation properties, requiring immediate medical attention if exposure occurs. Always follow proper hygiene practices and wash hands thoroughly after handling.

How to store sodium fluoride correctly?

Sodium fluoride should be stored in a cool, dry place in tightly sealed containers away from moisture and incompatible materials. Keep away from acids, aluminum, and strong oxidizing agents to prevent dangerous reactions. Storage areas must be well-ventilated and equipped with appropriate spill containment measures. Maintain storage temperatures below 25°C and protect from direct sunlight to ensure product stability.

What to do in case of contact with sodium fluoride?

Immediate first aid measures include removing contaminated clothing and flushing affected skin or eyes with plenty of water for at least 15 minutes. If inhaled, move the person to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Contact emergency services if symptoms persist or worsen, as sodium fluoride can cause serious health effects requiring professional medical treatment.

How to dispose of sodium fluoride appropriately?

Sodium fluoride disposal must comply with local and national hazardous waste regulations as it is classified as toxic waste. Contact licensed waste disposal companies for proper treatment and disposal. Never dispose of through regular waste streams or pour down drains. Small quantities may require neutralization before disposal, but this should only be performed by qualified personnel following established safety protocols.

How to transport sodium fluoride?

Sodium fluoride is classified under ADR Class 6.1 (toxic substances) Packaging Group III for transportation. It requires appropriate UN-approved packaging with proper labeling including GHS06 pictogram and danger signal word. Transport vehicles must carry appropriate documentation and emergency response information. Drivers require ADR training for handling toxic substances during transport operations.

Is sodium fluoride subject to specific regulations?

Sodium fluoride is regulated under REACH and CLP regulations in Europe, requiring proper classification, labeling, and safety data sheets. It is not listed as a Substance of Very High Concern (SVHC). The compound must be handled according to occupational exposure limits and workplace safety regulations. Users must comply with notification requirements and maintain appropriate risk assessments for industrial use.

Where to buy sodium fluoride in Europe?

Sodium fluoride is available through OYSI, a European distributor of technical chemicals serving industrial customers across Europe. OYSI provides quality chemical products with proper documentation, safety data sheets, and regulatory compliance support. Contact OYSI directly for availability, specifications, and delivery options tailored to your specific industrial requirements and location within Europe.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.