Reply To: Braille Code for Chemical Notation – Where is it? Home › Forums › Nemeth Code for Math and Science › Braille Code for Chemical Notation – Where is it? › Reply To: Braille Code for Chemical Notation – Where is it? September 21, 2018 at 2:00 pm #32004 kdejuteModerator Good question. The source I can recommend is to order a hard copy from APH: Braille Code for Chemical Notation, 1997 American Printing House for the Blind catalog #7-16900-00. I do not know of a source for a PDF. –Kyle