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294993

Sigma-Aldrich

Ammonia

greener alternative

anhydrous, ≥99.98%

Synonym(s):

Ammonia gas

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About This Item

Linear Formula:
NH3
CAS Number:
7664-41-7
Molecular Weight:
17.03
Beilstein/REAXYS Number:
3587154
EC Number:
231-635-3
MDL number:
MFCD00011418
UNSPSC Code:
12142100
PubChem Substance ID:
24857750
NACRES:
NA.22

grade

anhydrous

Quality Level

200

vapor density

0.6 (vs air)

vapor pressure

8.75 atm ( 21 °C)

assay

≥99.98%

form

liquefied gas

autoignition temp.

1203 °F

expl. lim.

25 %

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

sustainability

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pH

~10-12 (20 °C, 50 g/L)

pKa (25 °C)

9.25

bp

−33 °C (lit.)

mp

−78 °C (lit.)

solubility

water: 531 g/L at 20 °C

density

0.7 g/cm3 at -33 °C

greener alternative category

Enabling,

SMILES string

N

InChI

1S/H3N/h1H3

InChI key

QGZKDVFQNNGYKY-UHFFFAOYSA-N

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General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.

Application

Ammonia may be used as a base to adjust pH for preparing mixed magnetite-hematite nanoparticles via combustion method. These nanoparticles show promising potential as sorbents for removing heavy metal ions from water.
Anhydrous ammonia has been used in dynamic reaction cell technology (DRC) to remove interfering ions without the loss of sensitivity. It has also been used for adjusting pH during the synthesis of magnetite-hematite mixture by combustion methods.
Reagent for chemical vapor deposition of TiN.

Packaging

Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.

Compatible with the following:
  • Aldrich® lecture-bottle station systems
  • Aldrich® lecture-bottle gas regulators

Other Notes

See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

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Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Flam. Gas 2 - Press. Gas Liquefied gas - Skin Corr. 1B

supp_hazards

EUH071

Storage Class

2A - Gases

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, multi-purpose combination respirator cartridge (US)

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Serum copper, zinc, and iron levels, and markers of carbohydrate metabolism in postmenopausal women with prediabetes and type 2 diabetes mellitus.
Skalnaya MG, et al.
Journal of Trace Elements in Medicine and Biology, 43, 46-51 (2017)
Weiller, B.H.
Journal of the American Chemical Society, 118, 4975-4975 (1996)
Assessment of serum trace elements and electrolytes in children with childhood and atypical autism.
Skalny AV, et al.
Journal of Trace Elements in Medicine and Biology, 43, 9-14 (2017)
Magnetite?hematite nanoparticles prepared by green methods for heavy metal ions removal from water.
Ahmed MA, et al.
Materials Science and Engineering, B, 178(10), 744-751 (2013)
Marion Vallet et al.
Kidney international, 88(1), 137-145 (2015-03-12)
Recent studies suggest that alkalinizing treatments improve the course of chronic kidney disease (CKD), even in patients without overt metabolic acidosis. Here, we tested whether a decreased ability in excreting urinary acid rather than overt metabolic acidosis may be deleterious
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