China Suppliers > Tianjin Yuansu Chemical Reagent Co., LTD > o-Nitroaniline-p-Sulfonic Acid
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o-Nitroaniline-p-Sulfonic Acid 616-84-2
Category : Dyestuffs and Pigments
CAS NO : 616-84-2 EC NO : 210-495-7 MF : C6H5N2O5S MW : 217.1798 Specification : 99% min Packing : 25kg 50kg drum or bag Product description : What is the chemical of o-Nitroaniline-p-Sulfonic Acid ? Appearance: Yellow or nearly yellow crystals ; Assay: 99% min by HPLC ; IR Identity: conform to standard ; HNMR： conform to standard ; carbon spectrum: conform to standard ; Water by K. F.:0.5% max or as per the customer’s request ; Loss on drying:0.5% max. or as per the customer’s request ; As dye intermediates: used for synthesizing organic dyes and reactive dyes In pharmaceutical and chemical industry: as intermediates in the fields of medicine and chemical engineering The synthesis method of this intermediate includes 4-chloro-3-nitrobenzenesulfonic acid ammonolysis; The sulfonation method of ortho nitroaniline using sulfuric acid or chlorosulfonic acid as sulfonating agents; The first method requires the reaction to be carried out under a certain pressure, and the synthesis process is also relatively complex; The solvent used in the second method is a mixture of monochlorobenzene and dichlorobenzene, with a product yield of 89.3% using sulfuric acid as the sulfonating agent and 90% using chlorosulfonic acid as the sulfonating agent. The prices of solvents and chlorosulfonic acid are both relatively high. Uses : Mainly used in the fields of dye intermediates and pharmaceutical chemicals Synonyms : 4-amino-3-nitrobenzene-1-sulfonic acid;4-Amino-3-nitrobenzenesulfonic acid;benzenesulfonic acid, 4-amino-3-nitro-;4-amino-3-nitrobenzenesulfonate;2-Nitroaniline-4-Sulfonic Acid; Molecular Structure : 
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o-Nitroaniline-p-Sulfonic Acid