batch and then add 4 formylbenzene 1 3 disulfonic acid 81 02 g as 100 heat the batch to above 100 deg c and keep the temperature stable until the reaction is completed oxidize the leuco compound product of step 1 with an appropriate oxidizer at a temperature above 100 deg c when the reaction is completed cool the reaction mass down and neutralize the excess of the acid with ethanolamine the process of formulating rinsable orange dye according to the present invention comprises 4 stages 1 clarification 2 diazotization 3 coupling and 4 filtration in a large beaker add naphthionic acid sodium salt and water and stir to complete solution ph 9 2 9 4 slowly add hydrochloric acid and white precipitation occurs at ph 2 2 2 4 stir the slurry for at least 4 hours then filter the slurry use the wetcake in stage 2 in a large beaker add water and hydrochloric acid add the wetcake of naphthionic acid from stage 1 agitate slurry for at least 2 hours in a separate beaker prepare a solution of sodium nitrate in water and add it slowly to the naphthionic acid slurry stir for 15 minutes checking acidity with congo paper and adding hydrochloric acid as needed check nitrite value using ki starch paper adding sodium nitrite as needed when both acidity and nitrite values are adjusted stir for 3 hours regularly checking both values stage 3 coupling of polyethoxylated aniline ethox ana 50 with naphthionic acid diazonium salt in a large beaker add preheated liquid ethox ana 50 liquid slowly transfer the naphthionic acid diazonium salt from stage 2 to the beaker containing the liquid ana 50 and agitate the mixture for about 30 minutes neutralize the reaction mass.