hi good morning.i am using tasiron syrup for my son who is 3years old as per my ped suggestion.it is dry syrup after mixing with water one time it is black in color and for next bottle it is white in color.i am confused if I can use white color tassiron syrup as most of the iron syrups are black in color and some bottles of tassiron are getting black color.i am throwing white syrup color bottles and these days I got 3 tassiron bottles turned to white after mixing with water.kindly suggest whether I can use them or not.