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Merck
CN

72190

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
NACRES:
NA.21
PubChem Substance ID:
329763879
UNSPSC Code:
41113319
MDL number:
MFCD00049656
Form:
liquid

Key Documents

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InChI key

OPCMAZHMYZRPID-UHFFFAOYSA-J

SMILES string

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

InChI

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

form

liquid

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

Quality Level

100

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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.

Other Notes

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

Disclaimer

For U.S. Customers: Contains mercury; Do not place in trash - dispose according to local, state, or federal laws.
may form little sediment upon storage

signalword

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

Storage Class

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

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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
S J Lambert et al.
Acta crystallographica. Section D, Biological crystallography, 55(Pt 5), 1048-1051 (1999-04-27)
Intact histone octamers, produced by a new method quickly and in bulk, were crystallized in KCl/phosphate, and the X-ray data were analysed to 2.15 A, confirming a P65 space group. This environment preserves the high-resolution structure of the octamers and
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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