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Nessler′s reagent

for qualitative det. of ammonia and ammonium compounds

Synonym(s):

Potassium tetraiodomercurate – Potassium hydroxide solution

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About This Item

CAS Number:
7783-33-7
MDL number:
MFCD00049656
UNSPSC Code:
41113319
PubChem Substance ID:
329763879
NACRES:
NA.21

form

liquid

Quality Level

100

quality

for qualitative det. of ammonia and ammonium compounds

specific analyte(s)

ammonium

technique(s)

photometry: suitable

impurities

potassium hydroxide
 potassium tetraiodomercurate

density

1.16 g/mL at 20 °C

application(s)

environmental
food and beverages
general analytical

SMILES string

[K+].[K+].I[Hg--](I)(I)I

InChI

1S/Hg.4HI.2K/h;4*1H;;/q+2;;;;;2*+1/p-4

InChI key

OPCMAZHMYZRPID-UHFFFAOYSA-J

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General description

Nessler′s reagent is widely used in determination of ammonium compounds. It can be prepared using anhydrous mercuric iodide and anhydrous potassium iodide. It can be prepared from potassium tetraiodomercurate dissolved in potassium hydroxide.

Application

Nessler′s reagent has been used in determining ammonia in flow analysis regime using analytical spectrometry.

Caution

may form little sediment upon storage

Other Notes

Reagent for the determination of ammonia
The method detection limit is 0.1 mg/L.
Reference: APHA 1975.

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A - STOT RE 2

Target Organs

Kidney,Central nervous system

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCD2740
BCCC3064
BCCC2297
BCCB5542
BCBZ6872

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A novel optoelectronic detector and improved flow analysis procedure for ammonia determination with Nessler?s reagent.
Kolacinska, Kamila, and Robert Koncki.
Analytical Sciences, 30.10, 1019-1022 (2014)
E.A. Burns et al.
The Analytical Chemistry of Nitrogen and its compounds, 51-51 (1970)
Santosh Kumar Verma et al.
Journal of AOAC International, 90(4), 1180-1190 (2007-09-01)
This paper presents development of a simple, rapid, and precise analytical method for determination of sulfur dioxide in ambient air by a gas to solid-phase conversion method. Sulfur dioxide is determined in the form of sulfite (SO3(2-)) because the absorbing
M A El Ries et al.
Journal of pharmaceutical and biomedical analysis, 25(1), 3-7 (2001-03-29)
Ion-associate complexes of atropine sulphate (I), diphenhydramine HCl (II), tolazoline HCl (III) and levamisole HCl (IV) with potassium tetraiodomercurate were precipitated and their solubilities were studied as a function of pH, ionic strength and temperature. Saturated solutions of each ion-associate
Justyna Bzura et al.
Enzyme and microbial technology, 123, 1-7 (2019-01-29)
Two fully mechanized flow analysis systems for urease activity assays have been developed, characterized and compared. Both of them are based on almost the same compact system of solenoid micropumps and microvalves controlled and actuated by highly effective, low-power and
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