She wants to know if the chemical compound dinitrophynl (maybe dinitrophenol) is part of the pfizer covid 19 vaccine/lab report showed a high level of this compound after getting the vaccine; sore arm; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 71-year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 11Oct2021 (Lot number: 30155BA) at the age of 71 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Mast cell activation syndrome" (ongoing); "Several autoimmune situations" (ongoing), notes: tissue autoimmune to thyroid, bone, liver and has one other going on, nerve to sheath. There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose 1, lot number: EN6204, Left arm, Time: 08:00), administration date: 10Mar2021, when the patient was 70 years old, for COVID-19 immunization, reaction(s): "Felt a little bit fluey"; Bnt162b2 (Dose 2, lot number: ER8733, left arm, Time: 11:00), administration date: 07Apr2021, when the patient was 70 years old, for COVID-19 immunization, reaction(s): "Face turned bright red and purple", "Face turned bright red and purple"; Flu vaccine, for Immunization; Rabies booster (rabies booster was a good 20 years ago), for Immunization. The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 11Oct2021, outcome "recovered" (12Oct2021), described as "sore arm"; LABORATORY TEST ABNORMAL (non-serious), outcome "unknown", described as "She wants to know if the chemical compound dinitrophynl (maybe dinitrophenol) is part of the pfizer covid 19 vaccine/lab report showed a high level of this compound after getting the vaccine". The events "sore arm" and "she wants to know if the chemical compound dinitrophynl (maybe dinitrophenol) is part of the pfizer covid 19 vaccine/lab report showed a high level of this compound after getting the vaccine" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section.  Additional Information: Showing the caller has tissue autoimmune to thyroid, bone, liver and has one other going on, nerve to sheath, hasn't put a name on it, its autoimmune. The caller states the tissue autoimmune to thyroid, bone, liver and nerve to sheath have just been specified within the last two months, but the patient states this has been going on since before any dose of the Adult Pfizer Vaccine. The caller has had for many years. The caller is a consumer calling regarding the Pfizer Vaccine. Agent attempts to clarify Pfizer Vaccine name and the caller states not told then when receiving just told receiving the Pfizer Vaccine. The caller clarifies the Pfizer Vaccine is the Adult dose. The caller received the first dose Adult Pfizer Vaccine on 10Mar2021 and the second dose Adult Pfizer Vaccine on 07Apr2021. The caller had an adverse reaction and never wanted to report the reaction. The caller wants everybody to go out and get the Pfizer Vaccine. The caller doesn't want to report. Received lab results back with high amounts of the compound chemical, dinitrophynl: The caller had a reaction. Recently the caller received lab results back with high amounts of the compound chemical, dinitrophynl. Spelling of dinitrophynl confirmed and documented as caller provided. The caller has called the FDA which said to call pfizer. The caller likes to keep right arm free in case the caller needs to swing at someone. History: The caller doesn't really know what would be relative. The caller has something called Mast Cell Activation Syndrome. The caller has several autoimmune situations and has had these autoimmune situations going on previous to any of the Adult Pfizer Vaccine doses. No Additional Vaccines Administered on Same Date of the Pfizer Suspect. The caller did not receive any vaccines within 4 weeks prior to the Adult Pfizer Vaccine doses. AE(s) following prior vaccinations: No, just typical kind of vaccination feeling of a little bit fluey. The caller clarifies felt a little bit fluey after receiving first dose Adult Pfizer Vaccine, after flu vaccine and after rabies booster. The caller is unable to provide NDC/lot/expiration for flu vaccine or rabies booster. the caller states the rabies booster was a good 20 years ago. First dose: Felt a little bit fluey: Caller felt a little bit fluey after receiving first dose Adult Pfizer Vaccine. The caller states feeling a little bit fluey began on 11Mar2021, the day after receiving the first dose and went away within 24 hours and the caller recovered 100% completely. Second dose: Face turned bright red and purple: The caller states the reaction started on 09Apr2021, two days after receiving the second dose Adult Pfizer Vaccine. The caller's face turned bright red and purple. The red and purple did not extend down into neck very much. Then the caller's skin turned leather, hard like a piece of leather. Then over one weeks time, it peeled off, copious peeling, lots of peeling, it was charming. The caller has had this reaction before receiving the Adult Pfizer Vaccine but does not know what precipitates the reaction. The caller looks a lot younger now that a month of peeling on the face. Why go get last treatments. The caller states the peeling probably was over in 10 days after receiving the second dose Adult Pfizer Vaccine and the caller recovered completely. The caller clarifies the second dose Adult Pfizer Vaccine was received on 07Apr2021. Booster dose: Had no reaction after receiving the booster dose Adult Pfizer Vaccine except a tiny bit of sore arm: The caller had no reaction after receiving the booster dose Adult Pfizer Vaccine except a tiny bit of sore arm. The sore arm began within of a couple hours of receiving the Adult Pfizer Vaccine booster dose on 11Oct2021 and went away in one day and the caller recovered completely. The caller can swing with left arm. The caller would like to know if the compound, dinitrophynl, is used in the Adult Pfizer Vaccine.   No follow-up attempts are possible. No further information is expected.