Three days later, Leo developed a weeping rash on his chest and severe photophobia (light sensitivity). He went to the ER. Doctors, following the SDS guidance Maria had posted, treated it as a and possible systemic absorption.
Maria didn't argue. Instead, she showed him Section 11 (Toxicological Information). She read aloud: "Repeated dermal exposure can cause cumulative liver damage. Symptoms are delayed—fatigue, jaundice, dark urine. It’s a sensitizer, too. First time, no reaction. Second time? Your skin explodes in hives."
"Jim! Stop," Maria said, holding up the new SDS. "You need nitrile gloves and a Tyvek sleeve for that."