Product Description
Available in pale yellow or off-white powder form, Neville and Winther's acid ( N W Acid ) is used as dyestuff intermediate ( especially for azo dyes) in textile industry. Its molecular weight is 224 gram and it is offered in 65% pure form. As per screening test, its water based solution contains less than 0.20% insoluble matter. Also referred as 1-Naphthol-4-sulfonic acid, Neville and Winther's acid ( N W Acid ) is well known for its balanced content, non toxic composition, low impurity level and standard shelf life.