Kalmar “Pentavalent” yawanci ana amfani da ita a cikin ilmin sunadarai kuma tana nufin wani sinadari ko ion wanda ke da valence biyar, ma’ana yana iya samar da haɗin sinadarai tare da wasu atom ko ions guda biyar.Gama Misali, phosphorus a cikin yanayin oxidation 5 ana ɗaukarsa pentavalent, saboda yana iya ƙirƙirar haɗin sinadarai guda biyar tare da wasu abubuwa ko ions. Wani misali kuma shine antimony a cikin yanayin oxidation 5, wanda kuma zai iya samar da haɗin gwiwar sinadarai guda biyar.A cikin mahallin alluran rigakafi, "pentavalent" yana nufin wani maganin rigakafi da ke ba da kariya daga cututtuka daban-daban guda biyar. Misali, maganin alurar riga kafi da aka saba amfani da shi a cikin shirye-shiryen rigakafi ya haɗa da kariya daga diphtheria, pertussis, tetanus, hepatitis B, da Haemophilus influenzae type b (Hib).