Babban sinadarin talc shine hydrotalcite hydrous magnesium silicate tare da dabarar kwayoyin halitta ta mg3 [si4o10] (OH) 2. Talc na cikin tsarin monoclinic. Talc yana da siffar pseudohexagonal ko rhombic, lokaci-lokaci. Yawanci suna da yawa, ganyaye, radial da fibrous aggregates. Ba shi da launi kuma yana da haske ko fari, amma kore ne mai haske, rawaya mai haske, launin ruwan kasa mai haske ko ma ja mai haske saboda ɗan ƙazanta; saman rabawa yana da lu'u-lu'u. Tauri 1, takamaiman nauyi 2.7-2.8.

Foda talc yana da kyawawan halaye na zahiri da na sinadarai kamar su man shafawa, juriya ga gobara, juriya ga acid, kariya daga iska, zafin narkewa mai yawa, rashin aiki na sinadarai, ƙarfin rufewa mai kyau, laushi, haske mai kyau, shawa mai ƙarfi, da sauransu saboda tsarin lu'ulu'u na talc yana da layi, yana da yanayin rabawa cikin sauƙi zuwa sikelin da kuma man shafawa na musamman. Idan abun da ke cikin Fe2O3 yana da yawa sosai, rufinsa zai ragu.

Amfani da talc:

(1) Matsayin Kayan Kwalliya (Hz): ana amfani da shi don kowane nau'in foda mai laushi, foda mai kyau, foda na talcum, da sauransu.

(2) Matsayin abinci na magani (YS): kwamfutar magani, murfin sukari, foda mai zafi, takardar maganin kasar Sin, ƙarin abinci, maganin keɓewa, da sauransu.

(3) Matsayin Shafawa (TL): Ana amfani da shi don launin farin jiki da duk wani nau'in fenti mai tushen ruwa, mai tushen mai, resin masana'antu, faranti, fenti mai kariya, da sauransu.

(4) Matsayin takarda (zz): ana amfani da shi azaman cikawa ga kowane nau'in takarda da allon takarda, wakilin sarrafa kwalta na itace.

(5) Matsayin filastik (SL): ana amfani da shi azaman cikawa ga polypropylene, nailan, polyvinyl chloride, polyethylene, polystyrene, polyester da sauran robobi.

(6) Matsayin roba (AJ): ana amfani da shi don cika roba da kuma wakili mai hana mannewa na kayayyakin roba.