7722-86-3 Usage
Description
Perxomonosulphuric acid, also known as Caro's acid, is a strong oxidizing agent with the chemical formula H2SO5. It is a colorless, oily liquid that is highly reactive and unstable. Peroxomonosulphuric acid is formed by the reaction of concentrated sulfuric acid with hydrogen peroxide.
Uses
Used in Chemical Synthesis:
Perxomonosulphuric acid is used as an oxidizing agent for the conversion of ketones to lactones, olefins to glycols and esters, and in the preparation of dyes and bleaching agents. It is particularly useful in the synthesis of complex organic compounds due to its strong oxidizing properties.
Used in Textile Industry:
In the textile industry, peroxomonosulphuric acid is used for treating woolens to prevent felting and shrinking. It helps to modify the wool fibers, making them more resistant to deformation and shrinkage during washing and other processes.
Used in Analytical Chemistry:
Perxomonosulphuric acid is used as a reagent for the analysis of pyridine, aniline, and many alkaloids. Its strong oxidizing nature allows for the detection and identification of these compounds in various samples.
Used in Bleaching Compositions:
Perxomonosulphuric acid is used in bleaching compositions for its ability to oxidize and break down colored compounds. This makes it an effective agent for whitening fabrics and other materials.
Preparation
peroxomonosulphuric acid may be prepared by several methods depending on what form of the reagent is desired. Most commonly, it is made by treating potassium perfulfate (K2S2O8) with sulfuric acid. The dry form is prepared by slowly stirring 100 g K2S2O8 into 60 mL of concentrated H2SO4, followed by adding 300 g potassium sulfate. A liquid Caro’s acid is obtained by slowly stirring K2S2O8 into three times the mass of H2SO4. The dilute form of the reagent may be obtained by either mixing K2S2O8 to 40% H2SO4 or by treating K2S2O8 with H2SO4 and adding ice to the mixture.
Alternatively, peroxomonosulphuric acid may be prepared from hydrogen peroxide by treatment with either chlorosulfonic acid or with H2SO4 at –40°C. A 90% H2O2 is used in the preparation.
peroxomonosulphuric acid is a strong oxidizing agent and is very unstable. All laboratory preparations must be carried out in an explosion-proof fume hood under temperature- controlled conditions and in the absence of impurities and oxidizable substances.
Hazard
peroxomonosulphuric acid is sensitive to heat and shock. Reactions with organic matter, finely divided metals and other readily oxidizable substances can be violent to explosive. It is a strong irritant to skin, eyes and mucous membranes.
Health Hazard
Peroxymonosulfuric acid is a strong irritant to theskin, eyes, and mucous membranes (Merck 1989).Toxicity data for this compound are not available.
Fire Hazard
Peroxymonosulfuric acid is highly unstable, decomposes dangerously on heating, and evolves oxygen at room temperature. It may react violently with organic matter and readily oxidizable compounds. Violent explosions have been reported with acetone, due to the formation of acetone peroxide (Toennis 1937). It may explode when mixed with many primary and secondary alcohols, manganese dioxide, cotton, many metals in finely divided form, and aromatics such as benzene, phenol, and aniline.
Safety Profile
Strong irritant. Powerful oxidizer. An explosive. Explosive reaction acetone; alcohols; aromatics (e.g., aniline; benzene; phenol); platinum; manganese dioxide; silver. Incompatible with acetone; catalysts; fibers. When heated to decomposition it emits t
Check Digit Verification of cas no
The CAS Registry Mumber 7722-86-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,2 and 2 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7722-86:
(6*7)+(5*7)+(4*2)+(3*2)+(2*8)+(1*6)=113
113 % 10 = 3
So 7722-86-3 is a valid CAS Registry Number.
InChI:InChI=1/H2O5S/c1-5-6(2,3)4/h1H,(H,2,3,4)
7722-86-3Relevant articles and documents
The Active Principle of Caro's Acid, HSO5-: X-Ray Crystal Structure of KHSO5.H2O
Flanagan, John,Griffith, William P.,Skapski, Andrzej C.
, p. 1574 - 1575 (1984)
The structure of HSO5-, the active component in Caro's acid, in the title compound, and in the triple salt K5(HSO5)2(HSO4)(SO4), has been determined and the location of the proton on the peroxo group established.
Anhydrous processing of methane into methane-sulfonic acid, methanol, and other compounds
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Page/Page column 10-11, (2008/06/13)
Anhydrous processing to convert methane into oxygenates (such as methanol), liquid fuels, or olefins uses an initiator to create methyl radicals. These radicals combine with sulfur trioxide to form methyl-sulfonate radicals. These radicals attack fresh methane, forming stable methane-sulfonic acid (MSA) while creating new methyl radicals to sustain a chain reaction. This system avoids the use or creation of water, and liquid MSA is an amphoteric solvent that increasing the solubility and reactivity of methane and SO3. MSA from this process can be sold or used as a valuable chemical with no mercaptan or halogen impurities, or it can be heated and cracked to release methanol (a clean fuel, gasoline additive, and chemical feedstock) and sulfur dioxide (which can be oxidized to SO3 and recycled back into the reactor). MSA also can be converted into gasoline, olefins, or other valuable chemicals.
METHOD OF PRODUCING A MIXED PERACID OXIDIZING SOLUTION AND METHODS FOR TREATING SUBSTRATES THEREWITH
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, (2008/06/13)
A process for treating a substrate, e.g., lignocellulosic pulp or cellulosic pulps with a mixed peracid solution comprising percarboxylic acid and Caro's acid which results in a higher conversion rate of the active oxygen in the hydrogen peroxide in order to provide an inexpensive and effective delignification and/or bleaching solution and the process for making the mixed peracid solution.