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Merck
CN

01110

Ammonium hydrogen difluoride

puriss., ≥97.5%

Synonym(s):

Ammonium bifluoride, Etching powder

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About This Item

Linear Formula:
NH4HF2
CAS Number:
1341-49-7
Molecular Weight:
57.04
UNSPSC Code:
12352302
PubChem Substance ID:
57646689
EC Number:
215-676-4
MDL number:
MFCD00012018
Assay:
≥97.5%

Key Documents

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InChI key

KVBCYCWRDBDGBG-UHFFFAOYSA-N

InChI

1S/2FH.H3N/h2*1H;1H3

SMILES string

N.F.F

grade

puriss.

assay

≥97.5%

impurities

≤0.001% heavy metals (as Pb), ≤0.03% hexafluorosilicate (as (NH4)2SiF6)

mp

125 °C (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg, sulfite (SO32-): ≤50 mg/kg

cation traces

Ca: ≤50 mg/kg, Fe: ≤100 mg/kg, K: ≤50 mg/kg, Mg: ≤50 mg/kg

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pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

hcodes

H301,H314

Hazard Classifications

Acute Tox. 3 Oral - Eye Dam. 1 - Skin Corr. 1B

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges, type P3 (EN 143) respirator cartridges

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
50590
40920
20800
10290

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