7722-86-3 Usage
Chemical Properties
White crystalline solid; unstable, decomposes at 45°C; commercial product is a syrupy liquid containing equal parts of Caro’s acid and sulfuric acid; stored at dry ice temperature; very soluble in water.
Physical properties
White crystalline solid; unstable, decomposes at 45°C; commercial product is a syrupy liquid containing equal parts of Caro’s acid and sulfuric acid; stored at dry ice temperature; very soluble in water.
Uses
Different sources of media describe the Uses of 7722-86-3 differently. You can refer to the following data:
1. peroxomonosulphuric acid (Caro's acid) is used in the preparation of dyes and bleaching agents. It also is used as a strong oxidizing reagent to convert ketones to lactones, to convert olefins to glycols and esters, and to analyse pyridine, aniline and many alkaloids.
2. In preparation of dyes; oxidation of olefins to a-glycols; oxidation of ketones to lactones or esters; treating woolens to prevent felting and shrinking; in bleaching compositions.
3. Peroxymonosulfuric acid is used as an oxidizingagent to make glycols, lactones, and esters; formaking dyes; and in bleaching composition.
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.
Method of reducing chemical oxygen contaminants in water
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Page/Page column 4, (2010/02/13)
A method of cleaning water systems and an oxidizer (e.g., a potassium monopersulfate composition) that is used for the method are presented. When potassium monopersulfate is used as the oxidizer, it preferably has a low concentration (0.5 wt. %) of potassium oxodisulfate byproduct that causes irritation. The low potassium oxodisulfate concentration allows the composition to be used more liberally than conventional potassium monopersulfate. To control the release rate of the oxidizer, the oxidizer is formed into a tablet and coated with a material that dissolves at a desired rate. The coating material controls the rate at which the oxidizer is released when placed in contact with a solvent. The coated tablets may be aggregated under high pressure to form an agglomerate composition. A binder and/or a filler material may be added when forming the agglomerate composition to achieve a desired oxidizer release rate.
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.
