Ammonium Bifluoride Flakes Technical Grade

Product Identifier

Ammonium Bifluoride Flakes Technical Grade

Grade

Technical

CAS Number

1341-49-7

Chemical Formula

NH4HF2

Molecular Weight

57.04 g/mol

Manufacturer

Alliance Chemical
204 South Edmond Street, Taylor, TX 76574

Emergency Phone

Chemtel 1-800-255-3924 (24/7)

Synonyms

Ammonium hydrogen difluoride; ammonium hydrogen fluoride; ammonium acid fluoride; ABF

Recommended Use

Glass etching and frosting; metal surface treatment (aluminum brightening, pickling); oil-well acidizing; laundry sour; cleaning formulations.

Restrictions on Use

For industrial and laboratory use. Contact with acids releases toxic hydrogen fluoride gas. Never store or use in glass, ceramic or metal containers.

Classification

• Acute toxicity (oral), Category 3
• Skin corrosion/irritation, Category 1
• Serious eye damage/eye irritation, Category 1

Signal Word

Danger

Hazard Statements

• H301Toxic if swallowed
• H314Causes severe skin burns and eye damage

Precautionary Statements

• P260Do not breathe dust, fume, gas, mist, vapors or spray.
• P264Wash hands and face thoroughly after handling.
• P270Do not eat, drink or smoke when using this product.
• P280Wear protective gloves, protective clothing, and eye/face protection.
• P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor.
• P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P303+P361+P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
• P304+P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
• P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
• P310Immediately call a POISON CENTER or doctor.
• P321Specific treatment (see first-aid information on this label).
• P330Rinse mouth.
• P363Wash contaminated clothing before reuse.
• P405Store locked up.
• P501Dispose of contents and container in accordance with local, regional, national, and international regulations.

Classification, hazard (H) and precautionary (P) statements and pictograms per OSHA HCS 2024 (29 CFR 1910.1200, Appendices A–C), aligned with GHS Rev. 7.

Concentrations are nominal; lot-specific values appear on the Certificate of Analysis. Components not contributing to classification are omitted.

Eyes

Rinse with plenty of water for at least 15 minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention immediately.

Skin

Immediately flush with plenty of water for at least 15 minutes while removing contaminated clothing. Wash with soap. Get medical attention immediately.

Inhalation

Move person to fresh air and keep comfortable for breathing. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. Get medical attention immediately.

Ingestion

Do Not Induce Vomiting! Never give anything by mouth to an unconscious person. If conscious, wash out mouth with water. Get medical attention immediately.

Most Important Symptoms and Effects

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.

Immediate Medical Attention and Special Treatment

• Immediate medical attention is required after eye or skin contact or ingestion; tissue damage may continue after exposure ends.
• Get immediate medical attention after any significant exposure; symptoms may be delayed.

Suitable Extinguishing Media

Dry chemical, CO2, water spray. Use water spray to cool containers.

Unsuitable Extinguishing Media

Do not use a solid water stream as it may scatter and spread fire.

Specific Hazards Arising from the Chemical

Fire may release corrosive and toxic gases. Containers may rupture when heated.

Protective Equipment

Wear self-contained breathing apparatus and full protective clothing.

Hazardous Combustion Products

Hydrogen fluoride, ammonia and nitrogen oxides when heated or in contact with acids.

Personal Precautions

Use PPE as described in Section 8. Ensure adequate ventilation. Evacuate personnel to safe areas.

Hazard-Specific Precautions

Do not touch spilled material without protective equipment. Neutralize residue only with a method suitable for the material, then collect.

Environmental Precautions

Prevent leakage or spillage from entering drains, sewers, or waterways.

Containment & Cleanup

Absorb with inert material. Collect in appropriate waste container. Dispose per applicable regulations.

Safe Handling

Use with adequate ventilation. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling. Keep container closed when not in use.

Safe Storage

Store in a cool, dry, well-ventilated area. Use corrosion-resistant containers. Keep away from incompatible materials (see Section 10). Keep containers tightly closed.

Specific Storage Precautions

Keep in the original tightly closed polyethylene container in a cool, dry, ventilated area, away from acids, bases and moisture. Never store in glass or metal. Store locked up.

Occupational Exposure Limits

Engineering Controls

Use adequate ventilation. Provide eyewash stations and quick-drench showers accessible to areas of use.

Eye/Face Protection

Wear chemical safety goggles or face shield.

Skin Protection

Wear chemical-resistant gloves and protective clothing.

Respiratory Protection

Where mist, spray or dust is generated (e.g., spraying, atomization, pressure washing), use a NIOSH-approved half-face air-purifying respirator with combination acid gas / P100 cartridges. Ensure local exhaust ventilation.

Exposure limits sourced from NIOSH Pocket Guide, OSHA 29 CFR 1910.1000 and ACGIH TLVs.

Appearance

White crystalline flakes

Odor

Odorless to slightly pungent

Odor Threshold

No data available

pH

4.0–6.5 (5% aqueous solution, 25 °C)

Melting Point / Freezing Point

125–126 °C (257–259 °F)

Boiling Point

Decomposes at about 230–240 °C (446–464 °F) before boiling

Flash Point

Not applicable

Evaporation Rate

No data available

Flammability (solid, gas)

No data available

Upper/Lower Flammability or Explosive Limits

No data available

Vapor Pressure

About 0.75 mmHg (1 hPa) at 20 °C

Vapor Density

No data available

Relative Density

1.50 at 20 °C (water = 1)

Solubility

Very soluble in water (about 600 g/L at 20 °C); slightly soluble in ethanol (1.7% at 25 °C)

Partition Coefficient (n-octanol/water)

No data available

Auto-ignition Temperature

No data available

Decomposition Temperature

Above 230 °C; releases hydrogen fluoride and ammonia

Viscosity

No data available

Particle Characteristics

No data available

Form

Solid

Density

1.5 at 68 °F (USCG, 1999) - Denser than water; will sink

Values shown reflect product-specific canonical data. Lot-specific ranges may vary; see the Certificate of Analysis for the shipped lot.

Reactivity

Not reactive under normal conditions of use and storage.

Chemical Stability

Stable under recommended storage conditions.

Possibility of Hazardous Reactions

None under normal processing conditions.

Conditions to Avoid

Moisture and humidity (the flakes are hygroscopic and become corrosive), heat above 120 °C, and contact with acids.

Incompatible Materials

Acids (release hydrogen fluoride gas); strong bases (release ammonia); strong oxidizers; glass, ceramics and light metals such as aluminum and magnesium (attacked); moisture.

Hazardous Decomposition Products

Hydrogen fluoride, ammonia and nitrogen oxides when heated or in contact with acids.

See below for route-specific acute toxicity data.

Likely Routes of Exposure

Inhalation, skin contact, eye contact, ingestion.

Symptoms

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.

Delayed and Chronic Effects

• No delayed or chronic effects identified beyond the classification in Section 2.

Carcinogen Classification

Ecotoxicity

Data not available. Avoid release to the environment.

Persistence & Degradability

Inorganic; dissociates to NH₄⁺ and HF₂⁻/F⁻; acidic conditions release hydrofluoric acid (HF) — Not applicable (inorganic salt)

Bioaccumulative Potential

Not Available

Mobility in Soil

Not Available

Dispose of contents/container in accordance with applicable federal, state, and local regulations. Do not dispose of into drains or waterways.

EPA RCRA Waste Codes

Not a P- or U-listed waste. Evaluate aqueous wastes for D002 (pH ≤ 2); the generator makes the final hazardous-waste determination.

If discarded, this material may be a corrosive hazardous waste (EPA RCRA D002, 40 CFR 261.22): aqueous with pH ≤ 2 or ≥ 12.5, or a liquid that corrodes steel at more than 6.35 mm per year. The waste generator must make the final hazardous-waste determination.

US DOT (49 CFR)

UN Number

UN1727

Proper Shipping Name

Ammonium hydrogendifluoride, solid

Hazard Class

8

Packing Group

II

IMDG / IATA classifications may differ from US DOT. Verify current regulations before international shipment.

CERCLA Reportable Quantity (RQ)

Ammonium bifluoride (CAS 1341-49-7) 100 lb (45.4 kg). No single Alliance package reaches it (largest: 44-lb bag); a release of 100 lb or more is reportable to the National Response Center.

SARA 311/312 hazard categories correspond to the GHS classification in Section 2. Data retrieved as of: California Proposition 65 2026-10-02; US EPA TSCA Active Inventory 2026-10-02; EPCRA SARA 313 (TRI) 2026-10-02.

Revision Date

2026-10-08

Format

16-section format per OSHA HCS 2024 (29 CFR 1910.1200, Appendix D), aligned with GHS Rev. 7.