Informed consent impossible with the mysterious ingredient in a Pfizer vaccine vial

Physicians For Informed Consent (PIC), a group of American doctors and scientists advocating informed consent for vaccines, recently posted a document on their Instagram profile from the Food and Drug Administration stating that the anti-Covid jabs from Pfizer/Comirnaty contain an unknown ingredient.

Table 2 shows that 0.45 ml of an undisclosed excipient is part of the composition of the diluted vaccine solution. Since the total solution in a multi-dose vial measures 2.25 ml, this excipient makes up 20 percent of the solution and potentially 20 percent of each vaccine dose. The unspecified ingredient is also not mentioned in the package insert for the vaccine. If people do not know the description of an ingredient in an FDA-approved vaccine, how is that informed consent?
The Pulse contacted the FDA to ask about this mysterious ingredient, but has yet to receive an answer.

https://freewestmedia.com/2021/09/24/the-mysterious-ingredient-in-a-pfizer-vaccine-vial/