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Merck
CN

215996

Ammonium phosphate dibasic

ACS reagent, ≥98%

Synonym(s):

Ammonium hydrogenphosphate, Diammonium hydrogenphosphate, di-Ammonium hydrogenphosphate (sec)

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About This Item

Linear Formula:
(NH4)2HPO4
CAS Number:
7783-28-0
Molecular Weight:
132.06
NACRES:
NA.21
PubChem Substance ID:
329752180
UNSPSC Code:
12352300
EC Number:
231-987-8
MDL number:
MFCD00010891
Assay:
≥98%
Grade:
ACS reagent
Form:
crystals or chunks
powder

Key Documents

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Product Name

Ammonium phosphate dibasic, ACS reagent, ≥98%

InChI key

MNNHAPBLZZVQHP-UHFFFAOYSA-N

InChI

1S/2H3N.H3O4P/c;;1-5(2,3)4/h2*1H3;(H3,1,2,3,4)

SMILES string

N.N.OP(O)(O)=O

grade

ACS reagent

assay

≥98%

form

crystals or chunks
powder

impurities

≤0.005% NH4OH pptd.
≤0.005% insolubles

pH

7.7-8.1 (25 °C, 5%)

mp

155 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.001%
nitrate (NO3-): ≤0.003%
sulfate (SO42-): ≤0.01%

cation traces

Ca: 0.001%
Fe: ≤0.001%
K: ≤0.005%
Mg: 0.0005%
Na: ≤0.005%
heavy metals (as Pb): ≤0.001%

Quality Level

200

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Application

Ammonium phosphate dibasic can be used as a catalyst:
  • To synthesize tetrahydrobenzo[b]pyranderivatives via three‐component condensation reaction.
  • In the solvent-free Biginelli reactions.
  • To synthesize bis(indolyl)methanes via solvent-free reaction of indole derivatives and aromatic or aliphatic aldehydes.

General description

Ammonium phosphate dibasic is a water-soluble ammonium phosphate salt. It is a key component of phosphate fertilizers. It is commonly used as a flame retardant for plywood, paper, and fabrics, as well as a corrosion inhibitor consolidant for degraded carbonatic materials found in old buildings.

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
0000494207
0000494207
0000444210
0000400056
0000444210

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Ash M and Ash I.
Handbook of Green Chemicals, 627-627 (2004)
Matteo Frasnelli et al.
Acta biomaterialia, 33, 283-289 (2016-01-23)
The beta to alpha transition in tricalcium phosphate (TCP) bioceramics containing different amount of magnesium was studied in the present work. Mg-doped TCP powder was obtained by solid-state reaction starting from pure calcium carbonate, ammonium phosphate dibasic and magnesium oxide
Diammonium hydrogenphosphate for the consolidation of building materials. Investigation of newly-formed calcium phosphates.
Elena P, et al.
Construction Building Materials, 195, 557-563 (2019)
Electric Field-Assisted Solid Phase Extraction: Study of Electrochromatographic Parameters with an Anionic Model Compound.
Orlando RM, et al.
Journal of the Brazilian Chemical Society, 26(2), 310-318 (2015)
Study of metastable equilibria in the ternary system NH4H 2PO4-(NH4)2HPO4-H2O at -7 and -9 ?C.
Zerrouk L, et al.
Fluid Phase Equilibria, 354, 47-53 (2013)
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