901230

Sigma-Aldrich

Ammonium chloride

anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99.5%

Synonym(s):
Salmiac
Linear Formula:
NH4Cl
CAS Number:
Molecular Weight:
53.49
Beilstein/REAXYS Number:
4371014
MDL number:

Quality Level

grade

ACS reagent
anhydrous

vapor density

1.9 (vs air)

vapor pressure

1 mmHg ( 160.4 °C)

product line

Redi-Dri

assay

≥99.5%

form

powder or crystals

impurities

≤0.005% insolubles

ign. residue

≤0.01%

pH

4.5-5.5 (25 °C, 5%)

mp

340 °C (subl.) (lit.)

anion traces

phosphate (PO43-): ≤2 ppm
sulfate (SO42-): ≤0.002%

cation traces

Ca: ≤0.001%
Fe: ≤2 ppm
Mg: ≤5 ppm
heavy metals: ≤5 ppm (by ICP)

SMILES string

N.Cl

InChI

1S/ClH.H3N/h1H;1H3

InChI key

NLXLAEXVIDQMFP-UHFFFAOYSA-N

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General description

Crystals of ammonium chloride (NH4Cl) belong to the cubic crystal system. It can be synthesized by reacting HCl with aqueous ammonia solutions. NH4Cl is formed as a by-product during soda manufactured by Solvay process.

Application

Ammonium chloride (NH4Cl) has been used as one of the components of red blood cell (RBC) lysis buffer for use in various studies. It may be used as a catalyst in the preparation 3,4-dihydropyrimidin-2-(1H)-ones.
Inorganic ammonium ions (NH4+) effectively catalyze the aldol condensation of carbonyl compounds. It serves as a source of nitrogen during the preparation of trimethylamine hydrochloride (TMA·HCl).

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

hazcat

Acute Tox. 4 Oral - Eye Irrit. 2

storage_class_code

13 - Non Combustible Solids

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Articles
Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.
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