hemihydrate


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hemihydrate

[‚hem·ē′hī‚drate]
(organic chemistry)
A hydrate with a 2:1 molecular ratio of anhydrous compound to water, plaster of paris is the hemihydrate of calcium sulfate, composition CaSO4·½H2O.

hemihydrate

A hydrate which contains one-half molecule of water to one molecule of the compound; the most common such material is partially dehydrated gypsum (plaster of paris).
References in periodicals archive ?
An hour after the last administrations of drug or saline administration, MK-801, apomorphine hydrochloride hemihydrate, or haloperidol were injected to mice, and then the animals were subjected to appropriate schizophrenia model.
The hemihydrate content of R-CP was determined by the triphase composition analysis (TCA) of gypsum and simultaneous differential scanning calorimetry/thermogravimetric analysis (DSC/TG) instrument (SMP/PF7548/MET/400W).
Fars, "Analysis and Optimization of Using Hemihydrates Plaster ([beta]) for Casting Mould in Sanitary ware Industry," Ceram.
Two crystal structures of 9-methyl-9-azabicyclo[3.3.1]no-nan-3-one (2) and its hemihydrate (2 x (1/2)[H.sub.2]O) have been experimentally determined by single crystal X-ray diffraction.
Chlorogenic acid hemihydrate (CGA), (purity 97%, B21962, lot 10142590) was obtained from Alfa Aesar, A Johnson Matthey Company (Germany).
Notably, the commercially available powder form of CS is CS hemihydrate (CaSO[sub]4*1/2H[sub]2O).
This particular molecule could form either the monohydrate or hemihydrate in the drying stage of granulation.
To 3-amino-5-carboxy-1,2,4-triazole hemihydrate 3b (0.62 g, 4.62 mmol) in 40 mL of acetonitrile solution, triethylamine (0.5 mL) and 4chloro-3-nitro-2H-[1]-benzopyran-2-one 2 (1 g, 4.6mmol) was added.
To obtain composite gypsum binders we have conducted a series of tests: the optimal size distribution of the active mineral additives in the composite gypsum binders was determined by a laser granulometry method, the required amount of mineral additives in the binder was selected according to the concentration of calcium oxide contained in special formulations comprising an aqueous suspension of hemihydrate gypsum, portland cement and active mineral additives.
Similar studies were performed by Liu et al[9]using a composite of calcium sulfate hemihydrate (CSH), collagen and nanohydroxyapatite (nHAC) and designated as CSH/nHAC.
The active ingredient of BETIMOL is timolol hemihydrate and is available in concentrations of 0.25% and 0.5%.
Canagliflozin, the active ingredient of INVBKANA, is chemically known as (1S)-1,5-anhydro-1-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methylphenyll-D-glucitol hemihydrate and its molecular formula and weight are [C.sub.24][H.sub.25]F[O.sub.5]S * 1/2 [H.sub.2]O and 453.53, respectively.