Molecular formula : C7H7NO5S
MW : 217.20
CAS No. :121-03-9
nature : lamellae. 133.5 ° C melting point.
preparation methods : by sulfonation of dinitrotoluene derived. Melt the right to nitrotoluene inhalation enamelled pot reaction by adding 20% oleum 980kg, control the temperature not exceeding 90 ° C After the increase, warming up to 105-110 ° C, for one hour. After the completion of reaction cooling to 70 ° C and water dilution. The 100 ° C for 30 minutes stirring, cold to 25 ° C, adjust the acidity after filtration, cake or 2-methyl-5-trinitrobenzene sulfonic acid.
purposes : the material is fluorescent brighteners and dyes intermediates.
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