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Assay— Dissolve about 300 mg of Calcium Sulfate, accurately weighed, in 100 mL of water and 4 mL of 3 N hydrochloric acid. Boil, if necessary, to dissolve, and cool before titrating. While stirring, preferably with a magnetic stirrer, add, in the order named, 0.5 mL of triethanolamine, 300 mg of hydroxy naphthol blue, and, from a 50-mL buret, about 30 mL of 0.05 M edetate disodium VS.
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CALCIUM SULFATE DIHYDRATE [EP MONOGRAPH] Source: Common Name English CALCIUM SULFATE [WHO-IP] Sources: ... Tablet and capsule diluent. Storage: Calcium sulfate should be kept in a well-closed container. Requirement: Calcium sulfate contains not less than 98.0% and not more than the equivalent of 101.0% of CaSO4, calculated with reference to the ...
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[1–3]. In general, calcium sulfate compounds in the form of γ- or β-anhydrite (the nearly anhydrous), namely, anhy-drous calcium sulfate, calcium sulfate hemihydrate or plaster of Paris and calcium dihydrate (CaSO 4 · 2H 2 O) are the most abundant sulfate minerals in nature [4]. Natural gypsum or calcium sulfate dihydrate is a monoclinic-
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The effect of Fe2+, Fe3+, and Cr3+ ions on crystallization of calcium sulfate dihydrate (gypsum) produced by the reaction between calcium hydroxide suspension and sulphuric acid solution was ...
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Calcium sulfate | CaSO4 or CaO4S | CID 24497 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. ... SOLUBLE ANHYDRITE, which is obtained by heating calcium sulfate dihydrate at a temperature below 300 °C, has a ...
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Calcium salts may be incompatible with amines, amino acids, peptides, and proteins, which may form complexes. It is also anticipated that calcium sulfate would be incompatible with indomethacin, aspirin, aspartame, ampicillin, cephalexin, and erythromycin since these materials are incompatible with other calcium salts. Waste Disposal. Landfilling
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Calcium sulfate hemihydrate whiskers (CSHW), a multi-functional and high value-added building material, were prepared with flue gas desulfurization (FGD) gypsum by …
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Organic solvent-free synthesis of calcium sulfate hemihydrate at room temperature.: This paper presents an innovative method for synthesizing calcium sulfate hemihydrate using calcium sulfate dihydrate without organic solvents. The research contributes to greener synthesis methods and sustainable material production (Reigl et al., 2024).
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When the calcium sulfate dihydrate (CaSO4 · 2H2O) was dried at 110°C, they changed into the calcium sulfate hemihydrate or plaster of Paris (CaSO4 · 0.5H2O) and then transformed into the anhydrite or anhydrous calcium sulfate …
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Green Process Synth 2017; aop Nuchnapa Tangboriboon, Wanitcha Unjan, Watchara Sangwan and Anuvat Sirivat* Preparation of anhydrite from eggshell via pyrolysis DOI 10.1515/gps-2016-0159 Received September 16, 2016; accepted March 14, 2017 Abstract: Calcium sulfate dihydrate (CaSO4 · 2H2O) was prepared from the chemical reaction between calcium carbonate from …
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The CaSO4·0.5H2O was calcined at 700, 800 and 900°C and transformed into anhydrite or anhydrous calcium sulfate (CaSO4). The raw material used in this research was the duck …
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Kinetics of consecutive reactions with two-stage dehydration of calcium sulfate dihydrate has been examined by means of controlled-rate thermal analysis (CRTA). Under these conditions the intermediate formation of the hemihydrate was shown clearly.
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Calcium sulfate dihydrate (CaSO 4 ·2H 2 O) was prepared from the chemical reaction between calcium carbonate from duck eggshell and sulfuric acid at 25°C. The CaSO 4 ·2H 2 O was dried in an oven at 110°C and transformed into calcium sulfate hemihydrate or plaster of Paris (CaSO 4 ·0.5H 2 O). The CaSO 4 ·0.5H 2 O was calcined at 700, 800 and 900°C and transformed into …
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Calcium sulfate dihydrate (CaSO4·2H2O) was prepared from the chemical reaction between calcium carbonate from duck eggshell and sulfuric acid at 25°C. The CaSO4·2H2O was dried in an oven at...
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The crystallization of calcium sulfate dihydrate. Smith BR and Sweett F. Journal of Colloid and Interface Science, 37(3), 612-618 (1971) Accuracy and reproducibility of dental replica models reconstructed by different rapid prototyping techniques. Aletta Hazeveld et al.
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Types of Calcium Sulfate. Varied by water content, calcium sulfate presents as anhydrite or hard plaster in anhydrous form, hemihydrate with distinct structural types suitable for different applications, and dihydrate or soft plaster, often referred to as ordinary gypsum. Other Information on Calcium Sulfate How Calcium Sulfate is Produced
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แคลเซียมซัลเฟต (อังกฤษ: calcium sulfate) เป็นสารเคมีที่ใช้ในห้องทดลองและงานอุตสาหกรรม ในรูปแอนไฮดรัสเป็นของแข็งใช้เป็นตัวดูด ...
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Whisker Calcium Sulfate We are manufacturer of Whisker Calcium Sulfate which is widely used in industrial application as a strong friction material. It is used in different industrial applications like Brake pads, Grinding wheel and others.
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. CaSO4 · 2H2O. Synonyms: Calcium sulfate dihydrate. CAS 1. Molecular Weight 172.17. Browse and related products at Merck.
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The production of gypsum plaster starts from the thermal dehydration of gypsum (CaSO 4 ·2H 2 O, calcium sulfate dihydrate), at about 100–180 °C. During the process of heating, 75% crystallization water in calcium sulfate dihydrate is lost, and calcium sulfate hemihydrate (CaSO 4 ·0.5H 2 O) is finally formed, which is also referred as ...
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This is an older version of this substance - Ver. 23 . Definitional Access. Public definition
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Calcium sulfate (CaO4S * 2H20) dihydrate is a calcium salt that is used for a variety of purposes including: building materials, as a desiccant (drying agent), in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as an inactive ingredient tablet excipient and color glaze.
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Find here Calcium Sulfate, CaSO4 manufacturers, suppliers & exporters in India. Get contact details & address of companies manufacturing and supplying Calcium Sulfate, CaSO4, Calcium Sulphate across India. ... Powder calcium sulphate …
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Both gypsum (Calcium Sulfate Dihydrate) and anhydrite (Calcium Sulfate) have the same solubility of 0.205 grams per 100 grams water (2019 CRC Handbook of Chemistry and Physics). This has also been verified by many field trials by soil scientists, agronomists, and western farmers. The solubility of 0.205 grams per 100 grams water equates to: 0. ...
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Calcium-based desulfurization by-products can be divided into two categories: desulfurization gypsum and desulfurization ash. Desulfurization gypsum is mainly produced in …
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Preparation of Calcium Sulfate Whisker by Atmospheric Acidification Method from Flue Gas ... 3.1 Structural and morphological characterization of the raw FGD gypsum The major crystal phase in FGD-YL is dihydrate gypsum, indicated by the characteristic reflections at 0.756 nm, 0.427 nm, and 0.306 nm (Figure 1a), corresponding to the (020), (1 â ...
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Calcium sulfate comprises a group of minerals commonly found in natural and engineered environments. When CaSO 4 is precipitated from aqueous solutions three crystalline phases can be obtained (Fig. 1): gypsum (CaSO 4 ·2H 2 O), bassanite (CaSO 4 ·0.5H 2 O) and anhydrite (CaSO 4).The intersection of the solubility curves of the different hydrates defines the …
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Calcium sulfate dihydrate (CaSO4·2H2O) was prepared from the chemical reaction between calcium carbonate from duck eggshell and sulfuric acid at 25°C. The CaSO4·2H2O was dried in an oven at...
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Anhydrous calcium sulfate, Anhydrous gypsum, Anhydrous sulfate of lime, Calcium salt of sulfuric acid [Note: Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form.] Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
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The effects of SiO 2, Fe 2 O 3 and Al 2 O 3 on the decomposition of calcium sulfate (CaSO 4) were investigated by thermogravimetry, and the mineral phase composition of reaction products at high temperature was analyzed by X-ray powder diffraction when CaSO 4 was mixed with SiO 2, Fe 2 O 3, or Al 2 O 3.Moreover, the solid-phase reactions between CaSO 4 and the …
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CDA can be used to prepare high value-added products of calcium sulfate whiskers and ecological rubber fillers. ... and its main component is calcium sulfate dihydrate. Desulfurization gypsum has the same properties as natural gypsum and can be widely used ... and the SO 2 produced by its pyrolysis can also be oxidized to produce ...
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1. Introduction. Gypsum is a material in which the amount of water of crystallization varies with its surrounding conditions, such as temperature or humidity, and can be classified into three groups, namely, calcium sulfate anhydrite (CaSO 4), calcium sulfate hemihydrate (CaSO 4 ∙1/2H 2 O), and calcium sulfate dihydrate (CaSO 4 ∙2H 2 O) [].Calcium sulfate hemihydrate can …
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Dihydrate calcium sulfate whiskers (CaSO 4 ·2 H 2 O) are white, fluffy solids with fibrous or needle-like crystals, typically measuring 10–50μm in diameter, over 500 μm in length, and with L/D ratios of 20–100. They have limited hardness, heat resistance, and strength. These whiskers dehydrate at room temperature, converting into ...
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Manufacturer Product number Product description CAS number Packaging Price Updated Buy; Sigma-Aldrich: 12056: Calcium sulfate dihydrate puriss., meets analytical specification of NF, E 516, 99.0-101.0% (based on anhydrous substance)
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Abstract: Calcium sulfate dihydrate (CaSO 4 · 2H 2 O) was prepared from the chemical reaction between calcium carbonate from duck eggshell and sulfuric acid at 25°C. The CaSO 4 · 2H 2 …
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Calcium sulfate dihydrate ReagentPlus®, ≥99%; CAS Number: 1; EC Number: 231-900-3; Synonyms: Gypsum dihydrate; Linear Formula: CaSO4 · 2H2O at Sigma-Aldrich
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