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The volume of a particular material or compound is affected by ambient moisture and may be considered its coefficient of hygroscopic expansion (CHE) (also referred to as CME, or coefficient of moisture expansion) or the coefficient of hygroscopic contraction (CHC)—the difference between the two terms being a difference in sign convention.
The compound is a salt with separated hydroxyammonium and nitrate ions. [2] Hydroxylammonium nitrate is unstable because it contains both a reducing agent (hydroxylammonium cation) and an oxidizer , [3] the situation being analogous to ammonium nitrate. It is usually handled as an aqueous solution with small amount of nitric acid as a stabilizer.
Here, a primary standard is typically a reagent which can be weighed easily, and which is so pure that its weight is truly representative of the number of moles of substance contained. Features of a primary standard include: High purity; Stability (low reactivity) Low hygroscopicity (to minimize weight changes due to humidity)
Choline chloride is an organic compound with the formula [(CH 3) 3 NCH 2 CH 2 OH] + Cl −. It is a quaternary ammonium salt, consisting of choline cations ([(CH 3) 3 NCH 2 CH 2 OH] +) and chloride anions (Cl −). It is a bifunctional compound, meaning, it contains both a quaternary ammonium functional group and a hydroxyl functional group.
Lithium perchlorate is also used as an electrolyte salt in lithium-ion batteries.Lithium perchlorate is chosen over alternative salts such as lithium hexafluorophosphate or lithium tetrafluoroborate when its superior electrical impedance, conductivity, hygroscopicity, and anodic stability properties are of importance to the specific application. [11]
Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is the inorganic compound with the formula (NH 4) 2 [PtCl 6]. It is a rare example of a soluble platinum(IV) salt that is not hygroscopic. It forms intensely yellow solutions in water. In the presence of 1M NH 4 Cl, its solubility is only 0.0028 g/100 mL.
1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC, EDAC or EDCI) is a water-soluble carbodiimide usually handled as the hydrochloride. [1]It is typically employed in the 4.0-6.0 pH range.
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