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467782

Sigma-Aldrich

Ammonium phosphate monobasic

≥99.99% trace metals basis

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Synonym(s):
mono-Ammonium phosphate, prim-Ammonium phosphate, Ammonium dihydrogenphosphate
Linear Formula:
NH4H2PO4
CAS Number:
Molecular Weight:
115.03
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.55

grade

for inorganic trace analysis

Assay

≥99.99% trace metals basis

form

solid

impurities

≤0.005% insolubles
<100 ppm total metallic impurities

pH

3.8-4.4

mp

190 °C (dec.) (lit.)

solubility

water: soluble(lit.)

anion traces

chloride (Cl-): ≤5 ppm
nitrate (NO3-): ≤0.001%
sulfate (SO42-): ≤0.01%

cation traces

Ca: 0.001%
Fe: ≤0.001%
K: ≤0.005%
Mg: 0.0005%
Na: ≤0.005%
heavy metals: ≤5 ppm

SMILES string

N.OP(O)(O)=O

InChI

1S/H3N.H3O4P/c;1-5(2,3)4/h1H3;(H3,1,2,3,4)

InChI key

LFVGISIMTYGQHF-UHFFFAOYSA-N

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This Item
216003A3048NIST194A
Ammonium phosphate monobasic ACS reagent, &#8805;98%

Sigma-Aldrich

216003

Ammonium phosphate monobasic

Essential Grade
Ammonium dihydrogen phosphate NIST&#174; SRM&#174; 194a

NIST194A

Ammonium dihydrogen phosphate

-
assay

≥99.99% trace metals basis

assay

≥98%

assay

-

assay

-

form

solid

form

crystals or chunks

form

powder

form

-

impurities

≤0.005% insolubles, <100 ppm total metallic impurities

impurities

≤0.005% NH4OH pptd., ≤0.005% insolubles

impurities

-

impurities

-

pH

3.8-4.4

pH

3.8-4.4 (25 °C, 5%)

pH

-

pH

-

mp

190 °C (dec.) (lit.)

mp

190 °C (dec.) (lit.)

mp

190 °C (dec.) (lit.)

mp

190 °C (dec.) (lit.)

General description

Ammonium phosphate monobasic (APM) is an inorganic salt widely used in fertilizer, baking powder and yeast production. It is also employed as an agent to control pH of a solution, in corrosion inhibition. APM can be prepared by reacting phosphoric acid with anhydrous ammonia maintaining the pH below 5.8. The change in some of the physical characteristics on its addition to a high carbonate containing unfired and fired illitic shale has been studied.

Application

Employed in the synthesis of the first example of a mixed-valence ammonium iron phosphate, NH4Fe2(PO4)2.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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