Calcium sulfate dihydrate

Bezeichnung:Calcium sulfate dihydrate

CAS-Nr10101-41-4

Englisch Name:Calcium sulfate dihydrate

CBNumberCB5110067

SummenformelCaH6O5S

Molgewicht158.18

MOL-Datei10101-41-4.mol

Calcium sulfate dihydrate physikalisch-chemischer Eigenschaften

Schmelzpunkt	128°C -1.5H₂O
Siedepunkt	163°C -2H₂O
Dichte	2.32
Flammpunkt	163°C -2H₂O
storage temp.	Store at +5°C to +30°C.
Löslichkeit	H₂O: 0.01 M at 20 °C, clear, colorless
Aggregatzustand	powder
Farbe	White
Wichte	2.32
Geruch (Odor)	at 100.00?%. odorless
PH	7.0 (50g/l, H2O, 20℃)(slurry)
Wasserlöslichkeit	2 g/L (20 ºC)
Sensitive	Hygroscopic
Merck	14,1706
Solubility Product Constant (Ksp)	pKsp: 4.5
Expositionsgrenzwerte	ACGIH: TWA 10 mg/m3
Dielectric constant	2.5（Ambient）
Stabilität	Stable. Incompatible with aluminium, strong acids.
InChIKey	PASHVRUKOFIRIK-UHFFFAOYSA-L
LogP	-1.031 (est)
CAS Datenbank	10101-41-4(CAS DataBase Reference)
NIST chemische Informationen	calcium sulfate(10101-41-4)
EPA chemische Informationen	Calcium sulfate dihydrate (10101-41-4)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/21/22-36/37/38
S-Sätze:	22-24/25-36-26
OEB	B
OEL	TWA: 5.0 mg/m3
WGK Germany	1
RTECS-Nr.	EW4150000
TSCA	Yes
HS Code	28332990
Toxizität	LD50 orally in Rabbit: > 10000 mg/kg

Gefahreninformationscode (GHS)

Calcium sulfate dihydrate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
monoclinic; hardness 1.5–2.0 Mohs; lumps or white powder(s); used in manufacturing portland cement, plaster of paris and artificial marble [KIR78] [MER06] [STR93]
Verwenden
Used in this determination of oxalates
Verwenden
Calcium Sulfate Dihydrate is obtained from gypsum, a naturally occurring compound. Also used in the preparation of calcium sulfate and calcium sulfoaluminate.
Definition
Gypsum: a monoclinic mineralform of hydrated calcium sulphate,CaSO₄.2H₂O. It occurs in five varieties:rock gypsum, which is oftenred stained and granular; gypsite, animpure earthy form occurring as asurface deposit; alabaster, a purefine-grained translucent form; satinspar, which is fibrous and silky; andselenite, which occurs as transparentcrystals in muds and clays. It is usedin the building industry and in themanufacture of cement, rubber,paper, and plaster of Paris.
Definition
A mineral that consists of calcium sulfate with water molecules attached, or the rock that consists primarily of this mineral.
Hazard
Nasal symptoms.
Landwirtschaftliche Anwendung
Selenite, which is a salt of selenic acid (H₂SeO₃), and very similar to sulphite, is made by the oxidation of selenium by nitric acid. The low solubility of ironselenite complexes is responsible for the non-toxic level of selenium in plants growing on acid soils having a very high total selenium content. Plants absorb selenite, but generally to a lesser extent, than selenate, which is another form of selenium.
Sicherheitsprofil
Human systemic effects by inhalation: fibrosing alveolitis ('growth of fibrous tissue in the lung), unspecified respiratory system effects, and unspecified effects on the nose. Questionable carcinogen with experimental carcinogenic data. Long considered a nuisance dust (dependmg on silica content). When heated to decomposition it emits toxic fumes of SO,. See also CALCIUM SULFATE, CALCIUM COMPOUNDS, and SULFATES.
läuterung methode
It loses only part of its H2O at 100-150o (see below). It is soluble in H2O and very slowly soluble in glycerol. It is insoluble in most organic solvents.

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