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CALCIUM SULPHITE

Sulfuric acid, calcium salt (1:1)

Chemical Identifiers
Linear Formula: CaSO3
EC No. : 243-873-5
Pubchem Client ID     10154041
IUPAC Name: calcium; sulphite
InchI Identifier: InChI=1S/Ca.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2
InchI Key: GBAOBIBJACZTNA-UHFFFAOYSA-L
CAS NUMBER: 10257-55-3
MOLECULAR FORMULA: CaSO3
MOLECULAR WEIGHT: 120.135 g/mol
MDL Number: MFCD00040663


Calcium sulfite or calcium sulfite is a chemical compound that is the calcium salt of sulfite with the formula CaSO3·x(H2O).
Two crystal forms are known, the hemihydrate and the tetrahydrate, CaSO3·½(H2O) and CaSO3·4(H2O), respectively.
All forms are white solids.
Sulfurous acid, calcium salt (1:1) is most notable as the flue gas desulfurization product.

Functions:
Antioxidant - Reduces oxidation to prevent the formation of free radicals that can be harmful to health.
Preservative - Prevents and inhibits the growth of unwanted microorganisms that can be harmful.
As a food additive, calcium sulfide is used as a preservative under E number E226.
Along with other antioxidant sulfites, Sulfuric acid, calcium salt (1:1) is widely used in the preservation of wine, cider, juice, canned fruit and vegetables.
Sulfites are strong reducing agents in solution, acting as oxygen-scavenging antioxidants to preserve food, but labeling is necessary as some individuals may be hypersensitive.


About Calcium Sulfite
Calcium Sulfite is a chemical compound used in water purification and remediation and as a food preservative.
Calcium sulfide is usually immediately available in most skins, including in bulk quantities.


usage areas
Drywall
Calcium sulfide is produced as an intermediate in the production of gypsum, the main component of drywall.
A typical US home contains 7 metric tons of this type of drywall.

food additive
Sulfuric acid is used as a food additive, calcium salt (1:1) is used as a preservative under E number E226.
Along with other antioxidant sulfites, it is widely used in preserving wine, cider, juice, canned fruit and vegetables.
Sulfites are strong reducing agents in solution, acting as oxygen-scavenging antioxidants to preserve food, but labeling is necessary as some individuals may be hypersensitive.

wood pulp production
Chemical wood pulp is the removal of cellulose from wood by dissolving the lignin that binds the cellulose together.
Calcium sulfide can be used in wood pulp production by the sulfite process as an alternative to the Kraft process, which uses hydroxide and sulfite instead of sulfite.
Calcium sulfide was used, but was largely replaced by magnesium and sodium sulfites and bisulfides to attack lignin.

gypsum
It is possible to use calcium sulfide to obtain gypsum by oxidizing (by adding O2) in a water mixture with manganese (Mn2+) cation or sulfuric acid catalysts.

Producing
Main article: Flue gas desulfurization
Sulfurous acid is produced on a large scale by calcium salt (1:1) flue gas desulfurization (FGD).
When coal or other fossil fuels are burned, the byproduct is known as flue gas.
The flue gas usually contains SO2, the emission of which is usually regulated to prevent acid rain.
The sulfur dioxide is cleaned before the remaining gases are emitted through the chimney flue.
An economical way to remove SO2 from flue gases is to treat wastewater with Ca(OH)2 hydrated lime or CaCO3 limestone.

Structure
The structure of calcium sulfide was studied by X-ray crystallography.
These studies show that the sulfide anion adopts its characteristic pyramidal geometry.
Ca2+ centers have high coordination numbers, are bound to sulfide oxygen atoms and water, and give calcium a coordination number of eight.
Mixed sulfite-sulphate represents an intermediate in the oxidation of sulfite to sulfate, as applied in the production of gypsum.

Calculated Properties    
Molecular Weight: 120.14    
Number of Hydrogen Bond Donors: 0    
Number of Hydrogen Bond Acceptors: 4    
Number of Rotatable Ties: 0    
Full Mass: 119.9194059    
Mass : 119.9194059    
Topological Polar Surface Area : 82.4 Å ²    
Heavy Atom Count: 5    
Isotope Atomic Number     0    
Number of Covalently Bonded Units     2    
Compound Canonicalized     Yes    

Calcium Sulfide Properties (Theoretical)
Compound Formula: CaO3S
Molecular Weight: 120.14
Appearance : Off-white powder
Melting Point: 600 °C
Boiling Point: None
Density : None
Solubility in H2O: 4.3 mg/100 ml (18 °C)
Full Mass: 119.919406
Mass : 119.919406


HANDLING AND STORAGE
Transport
Usage advice
Avoid contact with skin, eyes and clothing.
Avoid ingestion and inhalation.
Avoid prolonged or repeated exposure.
Remove contaminated clothing and wash before reuse.
Wash thoroughly after processing.

to store
Storage temperature
Store at 2°C - 8°C
Storage Requirements
Keep away from incompatible substances.
Close tightly when not in use

Characteristics
Food additive Calcium sulfide is a crystalline, unstable white powder that reacts with oxygen to convert it to calcium sulfate.
For example, in an acidic environment, sulfuric acid is obtained from it, which is used as a preservative.
Calcium sulfide does not dissolve well in water, reacting with acids and many other sulfites to release water and sulfur dioxide.
Calcium sulfide is produced chemically by passing sulfur dioxide through an aqueous suspension of calcium carbonate.
As a result of this reaction, calcium hydrosulfite is obtained, which when continuously evaporated to complete drying gives the final product, calcium sulfide. In finished form, it is characterized by a slight smell of sulfur dioxide.
Calcium sulfide stops the growth of fungi and bacteria in food, is a disinfectant, belongs to the group of antioxidants and preservatives and is a moderately dangerous supplement.

Use
Since the chemical additive E 226 contains calcium, it is often added to canned vegetables and fruits to add firmness to plant fibers.
Calcium sulfide can be used as a bleaching agent in sugar production.
Sulfuric acid, calcium salt (1:1) are actively used in the production of jam, marmalade, jelly, ice cream, low-sugar jam, dried fruit and semi-finished products.
Calcium sulfide is used to prevent darkening of natural products, it is added to grated horseradish, garlic, potatoes.
Calcium sulfite can be used in the preparation of beer, wine, soft drinks, juices, freezing of cephalopods and crustaceans.

Effect on humans
Preservative Calcium sulfide has no beneficial effect on human health, especially in asthmatic and allergic people, causes serious allergic reactions.
The substance can seriously affect the kidneys, cause disorders of the gastrointestinal tract.

Description
Calcium sulfide is a chemical compound that is the calcium salt of sulfuric acid.
Calcium sulfide is widely used in the preservation of wine, cider, juice, canned fruits and vegetables.
Like other metal sulfites, calcium sulfide reacts with acids to produce a calcium salt, sulfur dioxide gas, and water.
For this reason, calcium sulfide is not a desirable compound in drywall - when moist it releases sulfur dioxide and carbon dioxide is absorbed, forming calcium carbonate.

Chemical properties
CAS Number: 10257-55-3
EINECS Number : 233-596-8
IUPAC Name: Calcium Sulfite
Melting Point: 600 °C
Molar Mass: 120.17 g/mol
Molecular Formula: CaSO3
Resolution: 0.0043 g/100 ml
Synonyms: Sulfuric Acid, Calcium Salt; Calcium Sulfite

Projected Features    
logP : -1.2    
pKa (Strongest Acidic): -3.7    
Physiological Load: -1    
Number of Hydrogen Acceptors: 3    
Number of Hydrogen Donors: 0    
Pole Surface Area: 63.19 Ų    
Number of Rotatable Ties: 0    
Refraction: 10.08 m³ mol ⁻ ¹    
Polarizability: 5.1 ų    
Number of Rings: 0    
Bioavailability : Yes    
Rule of Five: Yes    
Hose Filter : No    
Veber's Rule: No    
MDDR-like Rule: No    

Chemical Formula : CaO3S
IUPAC name: calcium sulfide
Average Molecular Weight: 120,141
Molecular Weight: 119.919405711

Classification
Description    
It belongs to the class of inorganic compounds known as alkaline earth metal sulfides.
These are inorganic compounds in which the largest oxoanion is a sulfide and the heaviest atom not in an oxoanion is an alkaline earth metal.

Class : Inorganic compounds
Super Class : Mixed metal/non-metal compounds
Class : Alkaline earth metal oxoanionic compounds
Subclass: Alkaline earth metal sulfides

Alternative Parents    
inorganic oxides
Inorganic calcium salts
substitutions    
alkaline earth metal sulfide
inorganic calcium salt
inorganic oxide
inorganic salt

Agent name: calcium sulfide
CAS number: 10257-55-3
formula: Ca.H2-O3-S
Main Category
other classes
Calcium sulfide formula graphic representation
Category: sulfites

Description
Dihydrate: White solid

Sources/Uses
Preservative (cider and other juices), disinfectant (beer kegs), bleach (textiles and pulp),
in the manufacture of sugar and cement;
Used as a disinfectant (sugar and beer industries),
food preservative and antichlorine (remove excess chlorine in textile and paper industries)

IDENTITY    
CAS Number:     10257-55-3
MDL Number:     MFCD00040663
MF:     CaSO3
MW:     120.14
EINECS:     233-596-8
FEATURES AND FEATURES    
min. Purity Feature:     95%
Physical Form (at 20°C):     White powder
Melting Point:     >360°C
Long-Term Storage:     Store in a cool, dry place for a long time.

Calcium sulfide - Names and Descriptors
Name     Calcium sulfide
CAS     10257-55-3
EINECS     233-596-8
InChI     InChI=1/Ca.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2

Calcium sulfide - Physico-chemical Properties
Molecular Formula     CaO3S
Molar Mass     120,141 g/mol
Used as analytical reagents also used in textile, paper and sugar industry    

Description
Calcium Sulfitequick Details
Chemical Name: Calcium Sulfite
CAS No.: 10257-55-3
Molecular Formula: CaO4S
Molecular weight: 136.1406
Appearance: white spherical
Experiment: 95%

Typical Properties of Calcium Sulfite
appearance : white sphere
Test (CaSO3)%     ≥95%
CaO: 0.3
SiO2: 1.0
MgO: 2.6
Na2O: 0.7
Others: 0.3

Use of Calcium Sulfite
Used to remove residual chlorine from water for showers, swimming pools, bath water treatment.

Calcium Sulfite Storage
The gasket is stored in a cool and dry place.

synonyms    
calcium sulfide
10257-55-3
calcium sulfide
Sulfuric acid, calcium salt (1:1)
calcium; sulphite
calciumsulfite
UNII-7078964UQP
7078964UQP
calcium sulfide
EINECS 233-596-8
EC 233-596-8
DTXSID10883104
MFCD00040663
AKOS015856584
FT-0623415
Q899410
15091-91-5

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