Sacred anointing oil

Exodus 30:17-38
Incense: Take fragrant spices—gum resin, onycha and galbanum—and pure frankincense, all in equal amounts, and make a fragrant blend of incense, the work of a perfumer. It is to be salted and pure and sacred.
Anointing Oil: Make these into a sacred anointing oil, a fragrant blend, the work of a perfumer. It will be the sacred anointing oil. You shall consecrate them so they will be most holy, and whatever touches them will be holy.
Why?
Incense includes salt to prevent spoiling or corruption.
Anointing Oil used to consecrate all the vessel in the Tent of  Meeting. For those are Holy before the Lord.
All the instruction of Anointing Oil and Incense could not be made for others, it is limited used for the God's work.