Potassium metabisulfite
Chemical compound / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Potassium metabisulfite?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour. It is mainly used as an antioxidant or chemical sterilant.[1] As a disulfite, it is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably. Potassium metabisulfite has a monoclinic crystal structure.
Quick Facts Names, Identifiers ...
Names | |
---|---|
Other names
| |
Identifiers | |
3D model (JSmol) |
|
ChemSpider |
|
ECHA InfoCard | 100.037.072 |
E number | E224 (preservatives) |
PubChem CID |
|
RTECS number |
|
UNII | |
CompTox Dashboard (EPA) |
|
| |
| |
Properties | |
K2O5S2 | |
Molar mass | 222.31 g·mol−1 |
Appearance | White crystalline powder |
Odor | Pungent (sulfur dioxide) |
Density | 2.34 g/cm3 (solid) |
Melting point | 190 °C (374 °F; 463 K) decomposes |
450 g/L (20 °C) | |
Solubility | Insoluble in ethanol |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Irritant, asthma risk |
GHS labelling: | |
Danger | |
H315, H318, H335 | |
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P362, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Safety data sheet (SDS) | ICSC 1175 |
Related compounds | |
Other anions |
Potassium bisulfite Potassium sulfite |
Other cations |
Sodium metabisulfite |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Close