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a.1.(Chem.) Pertaining to, or derived from, a sulphone; - used specifically to designate any one of a series of acids (regarded as acid ethereal salts of sulphurous acid) obtained by the oxidation of the mercaptans, or by treating sulphuric acid with certain aromatic bases (as benzene); as, phenyl sulphonic acid, C6H5.SO2.OH, a stable colorless crystalline substance.
Sulphonic group
(Chem.) the hypothetical radical, SO2.OH, the characteristic residue of sulphonic acids.
References in periodicals archive ?
2,4-dinitrobenzene sulphonic acid (15 mg per rat) dissolved in 0.25 mL of 50% ethanol was instilled into the distal colon of each animal using a rubber catheter, so that the tip was about 8 cm proximal to the anus.
Moro et al., "N-(3- (Aminomethyl)benzyl)acetamidine, an inducible nitric oxide synthase inhibitor, decreases colonic inflammation induced by trinitrobenzene sulphonic acid in rats," Life Sciences, vol.
In the same way, chemicals like lineralkoil benzene, sulphonic acid are used in carpet manufacturing, washing of vehicles, floors but some manufacturer of low cost shampoo use not only the chemicals but also a banned PPD chemical in the manufacturing of cheap shampoo and hair dyes which may cause skin cancer, permanent hair fall and allergic problems, the report added.
Chitosan, 85% deacetylated with a molecular weight of approximately 2, 70,000 Da (Central Institute of Fisheries Technology, Cochin, India), succinic anhydride, Trinitro benzene sulphonic acid, (Sigma-Aldrich Chemicals Co, USA), Human Insulin (400 IU/ml) kindly provided by USV Ltd.
Preparation of culture media : Culture media was prepared by dissolving 10.4g of powdered RPMI 1640 (Gibco Grand Island, New York) and 5.94g of HEPES (N-2 hydroxyethyl piperazine-N-2-ethane sulphonic acid) (Sigma Chemical Company, USA) in 11 of sterile distilled water.
Methane sulphonic acid-based tin and tin-leads are also used in preference to fluoborate types because they can be run at much higher current densities and produce very bright deposits.
The company has also set-up the company's first major sulphonic acid plant which is the most important raw material used in producing detergents.
Most important acid dyestuffs are sulphonic acid derivatives of azo dyes [3].
Sn[CL.sub.2] and p-toluene sulphonic acid monohydrate (TSA) as catalyst, were employed, purchased from Sigma-Aldrich.
Ferric chloride, 3-(2-pyridyl)5,6-bis(4-phenyl sulphonic acid)-1,2,4-triazine (Ferrozine), potassium ferricyanide, gallic acid, ascorbic acid, Folin-Ciocalteu reagent, Na2EDTA, 1,1-diphenyl-2-picryl-hydrazyl (DPPH), and trichloroacetic acid (TCA) were purchased from Sigma (Sigma-Aldrich GmbH, Sternheim, Germany).
Two tenders for the manufacturing and supply of (a) 100 tons sulphonic gas (GAS) to produce detergents for the automatic washing machines, also (b) 50 tons sodium greases and 50 tons yellow calcium greases.
In the same way chemicals lineralkoil benzene, sulphonic acid which are used in carpet manufacturing, washing of vehicles and floors are used in manufacturing of low-cost shampoo.