Industrial chemicals · Taylor, TXTechnical Data Sheet
Technical Data Sheet
Ammonium Bifluoride Flakes ACS Grade
ACS
- CAS number
- 1341-49-7
- UN number
- UN1727
- Hazard class · packing group
- 8 · PG II
- Structure
Structure · PubChem - Grade
- ACS
- Signal word
- Danger
- Hazards
- Proper shipping name
- Ammonium hydrogendifluoride, solid
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.
Identity & Composition
- Product Name
- Ammonium Bifluoride Flakes ACS Grade
- Alliance Code
- ammonium-bifluoride-flakes-acs-grade
- Grade
- ACS
- Concentration
- —
- CAS Number
- 1341-49-7PubChem
- Formula
- NH4HF2Adjudicated
- Molecular Weight
- 57.04 g/molAdjudicated
- Product Type
- Pure substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (NH4HF2) | Min. 98.5 % | 99.3 % | — | Interpreted |
| Aluminium (Al) | Max. 5 ppm | 0.36 ppm | — | Interpreted |
| Silicon (as (NH4)2SiF6) | Max. 500 ppm | 37 ppm | — | Interpreted |
| Barium (Ba) | Max. 5 ppm | 0.067 ppm | — | Interpreted |
| Bismuth (Bi) | Max. 5 ppm | 0.039 ppm | — | Interpreted |
| Cadmium (Cd) | Max. 5 ppm | 0.028 ppm | — | Interpreted |
| Calcium (Ca) | Max. 10 ppm | 1.2 ppm | — | Interpreted |
| Chloride (Cl) | Max. 50 ppm | 6.2 ppm | — | Interpreted |
| Chromium (Cr) | Max. 50 ppm | 0.8 ppm | — | Interpreted |
| Cobalt (Co) | Max. 5 ppm | 0.032 ppm | — | Interpreted |
| Copper (Cu) | Max. 5 ppm | 0.31 ppm | — | Interpreted |
| Heavy Metals (as Pb) | <= 0.002 % | 0.00018 % | — | Interpreted |
| Identity | complying | Passes test | Infrared spectroscopy (IR) | Interpreted |
| Insoluble Matter | <= 0.02 % | 0.0019 % | — | Interpreted |
| Iron (Fe) | Max. 100 ppm | 2.4 ppm | — | Interpreted |
| Lead (Pb) | Max. 5 ppm | 0.07 ppm | — | Interpreted |
| Lithium (Li) | Max. 5 ppm | 0.050 ppm | — | Interpreted |
| Magnesium (Mg) | Max. 5 ppm | 0.22 ppm | — | Interpreted |
| Manganese (Mn) | Max. 5 ppm | 0.052 ppm | — | Interpreted |
| Molybdenum (Mo) | Max. 5 ppm | 0.19 ppm | — | Interpreted |
| Nickel (Ni) | Max. 100 ppm | 0.71 ppm | — | Interpreted |
| Potassium (K) | Max. 50 ppm | 0.76 ppm | — | Interpreted |
| Silver (Ag) | Max. 5 ppm | 0.021 ppm | — | Interpreted |
| Sodium (Na) | Max. 50 ppm | 2.3 ppm | — | Interpreted |
| Strontium (Sr) | Max. 5 ppm | 0.066 ppm | — | Interpreted |
| Sulfite (SO3) | Max. 50 ppm | 1.6 ppm | — | Interpreted |
| Thallium (Tl) | Max. 5 ppm | 0.011 ppm | — | Interpreted |
| Total sulfur (as SO4) | Max. 100 ppm | 11 ppm | — | Interpreted |
| Moisture (as H₂O) | <= 0.4 % | 0.038 % | — | Interpreted |
| Zinc (Zn) | Max. 5 ppm | 0.16 ppm | — | Interpreted |
| Silica (SiO2) | Max. 50 ppm | 12 ppm | ICP-OES | Interpreted |
| Antimony (Sb) | Max. 5 ppm | 0.21 ppm | ICP-OES | Interpreted |
| Tin (Sn) | Max. 5 ppm | 0.11 ppm | ICP-OES | Interpreted |
| Titanium (Ti) | Max. 5 ppm | 0.12 ppm | ICP-OES | Interpreted |
| Vanadium (V) | Max. 5 ppm | 0.027 ppm | ICP-OES | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS | — | — | current | current |
| Technical | — | — | ammonium-bifluoride-flakes | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | White crystalline flakes | Adjudicated |
| Odor | Odorless to slightly pungent | Adjudicated |
| pH | 4.0–6.5 (5% aqueous solution, 25 °C) | Adjudicated |
| Specific Gravity | 1.50 at 20 °C (water = 1) | Adjudicated |
| Density | 1.5 at 68 °F (USCG, 1999) - Denser than water; will sink | Published reference |
| Boiling Point | Decomposes at about 230–240 °C (446–464 °F) before boiling | Adjudicated |
| Melting Point | 125–126 °C (257–259 °F) | Adjudicated |
| Flash Point | Not applicable | Adjudicated |
| Vapor Pressure | About 0.75 mmHg (1 hPa) at 20 °C | Adjudicated |
| Solubility (water) | Very soluble in water (about 600 g/L at 20 °C); slightly soluble in ethanol (1.7% at 25 °C) | Adjudicated |
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| glass / silicate-containing materials | Not recommended | — | lab.solstice.com |
| glass | Not recommended | — | lab.solstice.com |
| silicate-containing materials | Not recommended | — | lab.solstice.com |
Compatibility is drawn from published manufacturer and supplier documentation for this product; each rating is sourced. Confirm against your specific duty cycle before equipment selection.
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN1727Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Ammonium hydrogendifluoride, solidAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H301, H314Adjudicated
- P-Codes (Precautionary Statements)
- P260, P264, P270, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 2.5 mg/m³ TWA (F)Adjudicated
- ACGIH TLV
- 2.5 mg/m³ TWA (fluorides, as F); BEI fluoride in urine 2 mg/L prior to shift, 3 mg/L end of shiftAdjudicated
- NIOSH REL
- 2.5 mg/m³ TWA (F)Adjudicated
- NIOSH IDLH
- 250 mg/m³ (F)Adjudicated
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- 130 mg/kg (rat, OECD 401)Adjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Ammonium Bifluoride Flakes ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Fluoride source for etching, surface treatment and chemical processing where controlled fluoride activity is requiredlabproinc.com
- Laboratory, research or manufacturing use (reagent-grade flake certificate of analysis)digitalassets.avantorsciences.com
- Etching agent — the material is catalogued under the trade synonym "etching powder"lab.solstice.com
- Laboratory, research, or manufacturing use.digitalassets.avantorsciences.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- 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.Adjudicated
- Handling Precautions
- Use in ventilation or with respiratory protection — vapour is the primary exposure. Chemical splash goggles and gloves. Open and transfer cool; pressure can build in warm sealed containers. Neutralization with acid is exothermic.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Acids (release hydrogen fluoride gas); strong bases (release ammonia); strong oxidizers; glass, ceramics and light metals such as aluminum and magnesium (attacked); moisture.Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
UN1727, Ammonium hydrogendifluoride, solid, 8, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
NMFC Class
60
Placard
Corrosive
Packing Group
PG II
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.6 | 2026-10-08 | Canonical data updated: 25 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-09-30 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-08-05 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 6 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.