ammonium hydroxide


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ammonium hydroxide

[ə′mōn·yəm ‚hī′dräk‚sīd]
(inorganic chemistry)
NH4OH A hydrate of ammonia, crystalline below -79°C; it is a weak base known only in solution as ammonia water. Also known as aqua ammonia.
References in periodicals archive ?
Finally, the oscillation time was optimized for extractions using ammonium hydroxide solution 0.5% (v/v) with an oscillator at 160 rpm.
Ammonium hydroxide NMSO is a formaldehyde-free, macromolecule which is capable of crosslinking cellulose.
We prepared a stock standard solution of uric acid in 1 mmol/L ammonium hydroxide at a molar ratio of 1.7:1, according to Ellerbe s method.
% Change in weight after immersion for 24 hours Chemicals Matrix Composite 40% Nitric acid +0.7718 +3.0956 10% Hydrochloric acid +0.1523 +2.2087 8% Acetic acid +0.1645 +2.4307 10% Sodium hydroxide +0.1543 +5.1407 20% Sodium carbonate +0.0480 +1.5038 10% Ammonium Hydroxide +0.1476 +4.0652 Benzene +0.1226 +0.2084 Toluene +0.1242 +0.0679 Carbon tetrachloride +0.1759 +1.1560 Water +0.1614 +2.5056 Table 2: Tensile strength at break of polycarbonate toughened epoxy bamboo fiber composite with varying fiber length.
In addition, both strategies merely dilute the ammonium hydroxide functionality rather than eliminate it.
Certain component organisms of these biofilms produce urease, which hydrolyzes the urea in the patient's urine to ammonium hydroxide. The elevated pH that results at the biofilm-urine interface results in precipitation of minerals such as struvite and hydroxyapatite.
Sydney airport later confirmed that the fumes were caused by ammonium hydroxide, a cleaning agent, leaking into the air conditioning system.
According to the Department of Health (DOH), use of Siemens' ammonium hydroxide product as a fertilizer will have no adverse impacts on public health or the environment when used as directed.
However, we have shown in this study that if the pendant acrylic acid groups are first pre-neutralized with aqueous ammonium hydroxide and then ammonium carbonate is added prior to AZC addition, then colloidal stability is maintained and a stable ionomer dispersion is obtained.
Examples of bases are ammonium hydroxide (NH4OH), calcium hydroxide (Ca(OH)2), and potassium hydroxide (KOH).
The pH of the slurry and rinse tank should be controlled with reagent-grade ammonium hydroxide ([NH.sub.4] OH).