Poisonous if ingested. Causes BIRTH DEFECTS in animals.
From learntherisk.org: Glutaraldehyde and formaldehyde are chemicals used to inactivate toxins from viruses and bacteria in some vaccines. These chemicals are toxic in large quantities.
According to the Vaccine Knowledge Project at the University of Oxford in the United Kingdom, “a pear contains around 50 times more formaldehyde than is found in any vaccine.”