TI Request a Quote Email usrxmarinegroup @ gmail.com DocumentsRequest MSDS / TDS Lab Chemical-60 THORIN INDICATOR AR Product code RXSOL-60-6605-724 THORIN INDICATOR AR Request a Quote Email Us Thorin (also called Thoron or Thoronol) is an indicator used in the determination of barium, beryllium, lithium, uranium and thorium compounds. Being a compound of arsenic, it is highly toxic.