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| CAS No.: | 16731-55-8 |
|---|---|
| Name: | POTASSIUM METABISULFITE |
| Molecular Structure: | |
|
|
|
| Formula: | K2O5S2 |
| Molecular Weight: | 183.22 |
| Synonyms: | Disulfurous acid, potassium salt (1:2);Potassium pyrosulfite (6CI);Pyrosulfurous acid,dipotassium salt (8CI);Dipotassium disulfite;Dipotassium metabisulfite;Dipotassium pyrosulfite;Potassium disulfite (K2S2O5);Potassium metabisulfite (K2S2O5);Potassium metabisulfite; |
| EINECS: | 240-795-3 |
| Density: | 2.34 g/cm3 |
| Melting Point: | 190 °C |
| Solubility: | water: 0.1 M at 20 °C, clear, colorless |
| Appearance: | White to slightly yellowish fine cryst. powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 31-36/37/38 |
| Safety: | 26-36 |
| PSA: | 124.92000 |
| LogP: | 0.27220 |
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Consensus Reports
Dispose of in a manner consistent with federal, state, and local regulations.
Specification
The Potassium metabisulfite is an organic compound with the formula K2O5S2. The systematic name of this chemical is dipotassium oxidosulfanesulfonate oxide. With the CAS registry number 16731-55-8, it is also named as sulfanesulfonate, 1-olato-, oxide, potassium salt (1:2). The product's category is Inorganics. Besides, it is a white to slightly yellowish fine cryst. powder, which should be stored in a cool dry and ventilated place. It is used as a bleaching agent of food, preservatives and antioxidants. It is also used as analytical reagent, reagent, reducing agent and bacterial inhibitors.
Physical properties about Potassium metabisulfite are:
(1)ACD/LogP: -2.20; (2)ACD/LogD (pH 5.5): -6.68; (3)ACD/LogD (pH 7.4): -6.7; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)#H bond acceptors: 5; (7)#H bond donors: 2; (8)#Freely Rotating Bonds: 1; (9)Polar Surface Area: 119.26 Å2.
Preparation of Potassium metabisulfite:
This chemical can be prepared by Potassium carbonate and SO2. The reaction temperature is 90 - 100 °C. Chemical reaction equation is as follows:
Safety information of Potassium metabisulfite:
When you are using Potassium metabisulfite, please be cautious about it as the following:It contacts with acids liberates toxic gas. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Besides, this chemical is irritating to eyes, respiratory system and skin. When you are using it, wear suitable protective clothing.
You can still convert the following datas into molecular structure:
(1)SMILES:[K+].[K+].[O-]S(=O)S([O-])(=O)=O ;
(2)Std. InChI:InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2;
(3)Std. InChIKey:RWPGFSMJFRPDDP-UHFFFAOYSA-L.