Calcium sulfate (data page)
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Material Safety Data Sheet



The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS
Material safety data sheet
A Material Safety Data Sheet is a form with data regarding the properties of a particular substance....

) for this chemical from a reliable source and follow its directions.

Structure and properties


Structure and properties
Index of refraction, nD ?
Abbe number
Abbe number
In physics and optics, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material's dispersion in relation to the refractive index...

?
Dielectric constant
Dielectric constant
The relative permittivity of a material under given conditions reflects the extent to which it concentrates electrostatic lines of flux. In technical terms, it is the ratio of the amount of electrical energy stored in a material by an applied voltage, relative to that stored in a vacuum...

, εr
? ε0 at ? °C
Bond strength
Bond strength
In chemistry, bond strength is measured between two atoms joined in a chemical bond. It is the degree to which each atom linked to another atom contributes to the valency of this other atom...

?
Bond length
Bond length
- Explanation :Bond length is related to bond order, when more electrons participate in bond formation the bond will get shorter. Bond length is also inversely related to bond strength and the bond dissociation energy, as a stronger bond will be shorter...

?
Bond angle ?
Magnetic susceptibility
Magnetic susceptibility
In electromagnetism, the magnetic susceptibility \chi_m is a dimensionless proportionality constant that indicates the degree of magnetization of a material in response to an applied magnetic field...

?

Thermodynamic properties


Phase behavior
Triple point
Triple point
In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases of that substance coexist in thermodynamic equilibrium...

? K (? °C), ? Pa
Critical point ? K (? °C), ? Pa
Std enthalpy change
of fusion, ΔfusHo
205.668 kJ/mol
Std entropy change
of fusion
Standard entropy change of fusion
The entropy of fusion is the increase in entropy when melting a substance. This is always positive since the degree of disorder increases in the transition from an organized crystalline solid to the disorganized structure of a liquid...

, ΔfusSo
? J/(mol·K)
Std enthalpy change
of vaporization
Standard enthalpy change of vaporization
The enthalpy of vaporization, , also known as the heat of vaporization or heat of evaporation, is the energy required to transform a given quantity of a substance into a gas at a given pressure .It is often measured at the normal boiling point of a substance; although tabulated values are usually...

, ΔvapHo
? kJ/mol
Std entropy change
of vaporization
Standard entropy change of vaporization
The entropy of vaporization is the increase in entropy when vaporizing a substance. This is always positive since the degree of disorder increases in the transition from an organized crystalline solid or a slightly less organized liquid to the extremely disorganized structure of a gas...

, ΔvapSo
? J/(mol·K)
Solid properties
Std enthalpy change
of formation
Standard enthalpy change of formation
The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states...

, ΔfHosolid
-1434.5 kJ/mol
Standard molar entropy
Standard molar entropy
In chemistry, the standard molar entropy is the entropy content of one mole of substance, under standard conditions ....

,
Sosolid
106.5 J/(mol K)
Heat capacity
Heat capacity
Heat capacity , or thermal capacity, is the measurable physical quantity that characterizes the amount of heat required to change a substance's temperature by a given amount...

, cp
99.7 J/(mol K)
Liquid properties
Std enthalpy change
of formation
Standard enthalpy change of formation
The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states...

, ΔfHoliquid
? kJ/mol
Standard molar entropy
Standard molar entropy
In chemistry, the standard molar entropy is the entropy content of one mole of substance, under standard conditions ....

,
Soliquid
? J/(mol K)
Heat capacity
Heat capacity
Heat capacity , or thermal capacity, is the measurable physical quantity that characterizes the amount of heat required to change a substance's temperature by a given amount...

, cp
? J/(mol K)
Gas properties
Std enthalpy change
of formation
Standard enthalpy change of formation
The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states...

, ΔfHogas
? kJ/mol
Standard molar entropy
Standard molar entropy
In chemistry, the standard molar entropy is the entropy content of one mole of substance, under standard conditions ....

,
Sogas
? J/(mol K)
Heat capacity
Heat capacity
Heat capacity , or thermal capacity, is the measurable physical quantity that characterizes the amount of heat required to change a substance's temperature by a given amount...

, cp
? J/(mol K)

Spectral data


UV-Vis
λmax ? nm
Nanometre
A nanometre is a unit of length in the metric system, equal to one billionth of a metre. The name combines the SI prefix nano- with the parent unit name metre .The nanometre is often used to express dimensions on the atomic scale: the diameter...

Extinction coefficient
Molar absorptivity
The molar absorption coefficient, molar extinction coefficient, or molar absorptivity, is a measurement of how strongly a chemical species absorbs light at a given wavelength...

, ε
?
IR
Infrared
Infrared light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometres , and extending conventionally to 300 µm...

Major absorption bands ? cm−1
NMR
NMR spectroscopy
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy, is a research technique that exploits the magnetic properties of certain atomic nuclei to determine physical and chemical properties of atoms or the molecules in which they are contained...

Proton NMR
Proton NMR
Proton NMR is the application of nuclear magnetic resonance in NMR spectroscopy with respect to hydrogen-1 nuclei within the molecules of a substance, in order to determine the structure of its molecules. In samples where natural hydrogen is used, practically all of the hydrogen consists of the...

 
 
Carbon-13 NMR
Carbon-13 NMR
Carbon-13 NMR is the application of nuclear magnetic resonance spectroscopy to carbon. It is analogous to proton NMR and allows the identification of carbon atoms in an organic molecule just as proton NMR identifies hydrogen atoms...

 
 
Other NMR data  
MS
Mass spectrometry
Mass spectrometry is an analytical technique that measures the mass-to-charge ratio of charged particles.It is used for determining masses of particles, for determining the elemental composition of a sample or molecule, and for elucidating the chemical structures of molecules, such as peptides and...

Masses of
main fragments
 
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