Sodium Hydrogen Fluoride, Sodium Bifluoride, Sodium Difluoride, Sodium Acid Fluoride, Natrium Hydrogen Fluoride, Sodium Hydrogen Difluoride, 1333-83-1, 51273-71-3

Sodium Hydrogen Fluoride, Sodium Bifluoride, Sodium Difluoride, Sodium Acid Fluoride, Natrium Hydrogen Fluoride, Sodium Hydrogen Difluoride, 1333-83-1, 51273-71-3

SODIUM HYDROGEN FLUORIDE (SODIUM BIFLUORIDE)

PRODUCT IDENTIFIER INFORMATION

CHEMICAL STRUCTURE

    Na⁺  [F-H-F]⁻
    
    Sodium Hydrogen Fluoride (NaHF₂)
    Ionic Structure with Bifluoride Ion [F-H-F]⁻

Sodium Hydrogen Fluoride Molecular Structure

Molecular Formula: NaHF₂
SMILES: [F-].[F-].[Na+].[H+]
InChI: 1S/FH.Na/h1H;/q;+1
Crystal System: Tetragonal

SECTION 1: CHEMICAL IDENTITY AND DESCRIPTION

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 3: CHEMICAL PROPERTIES AND REACTIVITY

SECTION 4: PRODUCTION METHOD

Neutralization Method (Most Common):

Reaction:

Na₂CO₃ + 4HF → 2NaHF₂ + H₂O + CO₂↑

Process:

1. 40% hydrofluoric acid is measured into a plastic reactor

2. The apparatus is cooled with ice or cold water externally to maintain reaction temperature at 5°C or lower

3. Under stirring, filtered saturated soda ash (Na₂CO₃) solution is slowly added in a small stream

4. Neutralization is carried out until Congo red test paper is just red (acidic)

5. Cooling is applied

6. Vacuum suction filtration is performed

7. Crystals are washed with a very small amount of water to remove free acid

8. Centrifugal separation is carried out

9. Drying at 80°C

10. Crushing to obtain sodium hydrogen fluoride product

Process Notes:

• Temperature control is critical (must be kept at 5°C or lower)

• Sodium carbonate is used as the neutralizing agent

• The product is obtained as crystalline powder

• Proper ventilation and corrosion-resistant equipment are required

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), GHS05 (Corrosion), GHS07 (Exclamation Mark)

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: DOWNSTREAM PRODUCTS

SECTION 19: SUMMARY TABLE

SECTION 20: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• Toxic if swallowed (H301). Acute toxicity: LD50 ~ 50-150 mg/kg (rat).

• Causes severe skin burns and eye damage (H314/H318). Use full PPE.

• Toxic if inhaled (H331). Inhalation of dust severely irritates respiratory organs.

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

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

• Hygroscopic: Absorbs moisture from air and releases hydrogen fluoride (HF) gas.

• Decomposes at ~160°C to release toxic HF gas.

• Incompatibilities: Glass, strong acids, strong oxidizing agents, aluminum, aluminum alloys, sulfuric acid, edible products.

• Do not store with sulfuric acid and edible products.

BEST PRACTICE RECOMMENDATIONS:

• Food Preservation: Use as food protection agent at controlled concentrations; ensure proper labeling and handling.

• Glass Etching: Use as etching agent for engraved glass production; handle with extreme care; use plastic or PTFE equipment.

• Metal Processing: Use as flux and rust remover; ensure proper ventilation and PPE.

• Textile Processing: Use as textile processing agent; monitor concentrations carefully.

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

• Personal Protective Equipment: Use impervious gloves, chemical safety goggles, full face shield, protective clothing, and NIOSH-approved respiratory protection.

• Storage: Store in tightly closed, properly labeled plastic containers in dry, well-ventilated conditions; keep away from heat, acids, glass, and moisture; store separately from sulfuric acid and edible products.

• Spill Response: Avoid creating dust; wear full PPE; vacuum or wet sweep; place in sealed plastic containers for disposal; neutralize with appropriate alkaline materials; 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.