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Ammonium heptamolybdate tetrahydrate

GR for analysis ACS,ISO,Reag. Ph Eur

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Synonym(s):
Ammonium heptamolybdate tetrahydrate, Ammonium molybdate, Hexammonium heptamolybdate 4-hydrate
Linear Formula:
(NH4)6Mo7O24 · 4 H2O
CAS Number:
Molecular Weight:
1235.86
MDL number:
EC Index Number:
234-722-4

grade

ACS reagent

Quality Level

Agency

reag. ISO
reag. Ph. Eur.

form

solid

specific analyte(s)

phosphate

technique(s)

photometry: suitable

pH

5.3 (20 °C, 50 g/L in H2O)

mp

90 °C (Elimination of water of crystallisation)

solubility

400 g/L

density

2.498 g/cm3 at 20 °C

bulk density

800 kg/m3

storage temp.

2-30°C

InChI

1S/Mo.H3N.H2O.O/h;1H3;1H2;/q;;;-2/p+1

InChI key

XCOMAVCHADVANQ-UHFFFAOYSA-O

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1 of 4

This Item
1.011811.9360209878
Ammonium molybdate tetrahydrate BioUltra, ≥99.0% (T)

Sigma-Aldrich

09878

Ammonium molybdate tetrahydrate

Premium Grade
agency

reag. ISO, reag. Ph. Eur.

agency

-

agency

-

agency

-

form

solid

form

solid

form

-

form

-

pH

5.3 (20 °C, 50 g/L in H2O)

pH

5.3 (20 °C, 50 g/L in H2O)

pH

-

pH

4.0-5.5 (25 °C, 0.05 M in H2O)

mp

90 °C (Elimination of water of crystallisation)

mp

90 °C (Elimination of water of crystallisation)

mp

-

mp

-

solubility

400 g/L

solubility

400 g/L

solubility

-

solubility

H2O: 0.05 M at 20 °C, clear, colorless

Analysis Note

Assay (as MoO₃): 81.0 - 83.0 %
Assay ((NH₄)₆Mo₇O₂₄ x 4 H₂O): ≥ 99.0 %
Insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.0005 %
Nitrate (NO₃): passes test
Phosphate (PO₄): ≤ 0.0005 %
Phosphate, Arsenate, Silicate (as PO₄): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.005 %
Heavy metals (ACS): ≤ 0.001 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.005 %
K (Potassium): ≤ 0.002 %
Na (Sodium): ≤ 0.01 %
Pb (Lead): ≤ 0.001 %
Corresponds to ACS,ISO,Reag. Ph Eur

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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