Home >   Products   >  Advanced Search

Potassium Disulfite
(CAS RN:16731-55-8 Product Number:P2480)


Potassium Disulfite
Synonym Potassium Metabisulfite
Synonym Potassium Pyrosulfite

General Information

Product Number P2480

* Please contact our distributor or us if you would like to purchase TCI products. The above prices do not include freight cost, customs charge and other charges to the destination.
* To send your quote request for bulk quantities, please click on the "Request Bulk Quotation" button. Please note that we cannot offer bulk quantities for some products.
* TCI frequently reviews storage conditions to optimize them. Please note that the latest information on the storage temperature for the products is described on our website.

Purity/Analysis Method >97.0%(T)
Storage Temperature
M.F. / M.W. K2S2O5=222.31
CAS RN 16731-55-8
Related CAS RN
MDL Number MFCD00167605
Packaging and Container
  • Product Details
  • Safety & Regulations
  • Reference & Application


Purity min. 97.0 %

Data of Reference

mp 190°C(dec.)(lit.)
λmax 267(H2O)(lit.)


Reaxys-RN 14412766
PubChem SID 354334090
Merck Index(14) 7645
RTECS# TT4920000


Signal Word Danger
Hazard Statements
  • H318
  • :Causes serious eye damage.
Precautionary Statements
  • P280
  • :Wear face protection.
  • P305+P351+P338+P310
  • :If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a poison center or doctor.


An Antioxidant and an Antimicrobial Additive

Potassium disulfite is used as an antioxidant or an antimicrobial additive in mainly the food industry. (The product is not food-grade and is for research purpose only.)


Direct Sulfonation of Aryl Boronic Acids using Potassium Disulfite as a SO2 Source



Page Top