6291-65-2

Basic information

• Product Name: Dipotassium methanedisulfonate
• Synonyms: POTASSIUM METHANEDISULFONATE;METHANEDISULFONIC ACID DIPOTASSIUM SALT;dipotassium methanedisulfonate;dipotassium methanedisulphonate;Methanedisulfonic acid Potassium salt;Methanedisulfonic acid dipotassium salt >=99.0% (T);Methanedisulfonic acid,potassium salt (1:2)
• CAS NO: 6291-65-2
• Molecular Formula: CH₂O₆S₂*2K
• Molecular Weight: 252.35
• EINECS: 228-543-0
• Product Categories: Building Blocks;Chemical Synthesis;Organic Building Blocks;Sulfonic/Sulfinic Acid Salts;Sulfur Compounds
• Mol File: 6291-65-2.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• Density: 1.622[at 20℃]
• Water Solubility: 34.438g/L at 20℃
• CAS DataBase Reference: Dipotassium methanedisulfonate(CAS DataBase Reference)
• NIST Chemistry Reference: Dipotassium methanedisulfonate(6291-65-2)
• EPA Substance Registry System: Dipotassium methanedisulfonate(6291-65-2)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26
• WGK Germany: 3
• F: 10-21
• Hazardous Substances Data: 6291-65-2(Hazardous Substances Data)

Usage

Flammability and Explosibility

Notclassified

InChI:InChI=1/CH4O6S2.2K/c2-8(3,4)1-9(5,6)7;;/h1H2,(H,2,3,4)(H,5,6,7);;/q;2*+1/p-2

Synthetic route

potassium sulfite + dichloromethane (75-09-2) → methanedisulfonic acid dipotassium salt (6291-65-2)

Conditions	Yield
150-160°C, in autoclave, 2 h, molar ratio 2:1;	85%
150-160°C, in autoclave, 2 h, molar ratio 2:1;	85%

1,2-dibromomethane (74-95-3) → methanedisulfonic acid dipotassium salt (6291-65-2)

Conditions	Yield
With potassium sulfite; tetrabutylammomium bromide; potassium iodide In water at 70 - 90℃; under 755.326 - 756.076 Torr; for 48 - 96h; Product distribution / selectivity;	81.9%

dichloromethane (75-09-2) + potassium sulfite → methanedisulfonic acid dipotassium salt (6291-65-2)

Conditions	Yield
With water at 150 - 160℃; im Autoklaven;

potassium sulfite + chloroform (67-66-3) → methanedisulfonic acid dipotassium salt (6291-65-2)

Conditions	Yield
In water byproducts: K2SO4, KCl; 180°C, 12-14 h;

methanedisulfonic acid dipotassium salt (6291-65-2) → sulfite(1-) radical (12210-38-7)

Conditions	Yield
other Radiation; γ radiation;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triethyl phosphite (122-52-1) → [CH2(SO3)2Ag2(P(OEt)3)4] (1333243-71-2)

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triethyl phosphite (122-52-1) → [CH2(SO3)2Ag2(P(OEt)3)6] (1333243-73-4)

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triethyl phosphite (122-52-1) → [CH2(SO3)2Ag2(P(OEt)3)2]

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triphenylphosphine (603-35-0) → [CH2(SO3)2Ag2(PPh3)2] (1333243-57-4)

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triphenylphosphine (603-35-0) → [CH2(SO3)2Ag2(PPh3)3] (1333243-59-6)

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triphenylphosphine (603-35-0) → [CH2(SO3)2Ag2(PPh3)4]

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triphenylphosphine (603-35-0) → [CH2(SO3)2Ag2(PPh3)5]

Conditions	Yield
In diethyl ether (N2) 0°C;

methanedisulfonic acid dipotassium salt (6291-65-2) + silver nitrate + triphenylphosphine (603-35-0) → [CH2(SO3)2Ag2(PPh3)6]

Conditions	Yield
In diethyl ether (N2) 0°C;

formaldehyd (50-00-0) + methanedisulfonic acid dipotassium salt (6291-65-2) → methylene methane disulfonate (99591-74-9)

Conditions	Yield
With phosphorus pentoxide; sulfuric acid at 120℃; for 1h;	4.8 g

uranyl nirate hexahydrate + water (7732-18-5) + methanedisulfonic acid dipotassium salt (6291-65-2) + cucurbituril (80262-44-8) → methanedisulfonic acid

Conditions	Yield
at 180℃; High pressure;

Upstream product

• 74-95-3 1,1-dibromomethane 
• 67-66-3 chloroform 
• 75-09-2 dichloromethane 

Downstream Products

• 99591-74-9 methylene methane disulfonate 
• 1333243-59-6 [CH₂(SO₃)2Ag₂(PPh₃)3] 
• 1333243-57-4 [CH₂(SO₃)2Ag₂(PPh₃)2] 

Relevant articles and documents

Low pressure process for the preparation of methanedisulfonic acid alkali metal salts

The invention provides a process for producing alkylpolysulfonic acid alkali metal salts such as methanedisulfonic acid alkali metal salts. The process involves heating an aqueous solution of about two molar equivalents of an alkali metal sulfite to a temperature of from about 70° C. to about 90° C.; adding about one molar equivalent of a dihaloalkane to the aqueous alkali metal sulfite solution at a temperature of about 70-90° C.; and then separating the resulting alkyldisulfonic acid alkali metal salt from the reaction solution. The dihaloalkane is added at a pressure of about 1.1 atmospheres or less.