The three holy oils (Sacred Chrism, the Oil of Catechumens, and the Oil of the Sick) are visible signs of the Church’s sacramental life. They are blessed or consecrated for specific rites, kept with reverence, and used by clergy in moments that mark Christian initiation, priestly ministry, and pastoral care. Understanding the sacred oils also helps parish teams prepare for the Chrism Mass and care for oil stocks and the ambry throughout the year.
What are the three holy oils used in the Catholic Church?
The three holy oils are Sacred Chrism, the Oil of Catechumens, and the Oil of the Sick. Each one has a distinct role: Chrism is used in rites that seal, consecrate, and dedicate; the Oil of Catechumens is used in preparation for Baptism; and the Oil of the Sick is used in the sacramental anointing of those who are seriously ill, weakened by age, or preparing for serious medical procedures according to Church practice.
Although they are often kept together, these holy oils are never interchangeable. Their names, containers, and liturgical uses matter because they safeguard the meaning of the rites in which they appear. A parish that labels, stores, and handles them carefully is doing more than staying organized; it is protecting sacred signs entrusted to the Church.
Sacred Chrism is used for consecration and sealing
Sacred Chrism, sometimes called the oil of chrism, is olive oil mixed with balsam and consecrated by the bishop. It is the most solemn of the sacred oils because it is connected with the gift of the Holy Spirit, consecration to God, and the Church’s public worship. In parish settings, it is often marked with the letters SC or SChr so it can be identified clearly.
Chrism is used in Baptism, when the newly baptized person is anointed after the washing with water. It is used in Confirmation, where the bishop or delegated priest anoints the candidate. It is used in Holy Orders, in the ordination rites for bishops and priests. It is also used in the dedication of churches and altars, marking places of worship for sacred use.
Because Chrism is consecrated, it should be handled with calm attention and respect. Parish ministers who assist with preparation for Baptism or Confirmation should know where it is kept, how it is labeled, and who is responsible for placing it out and returning it afterward.
The Oil of Catechumens prepares people for Baptism
The Oil of Catechumens is used for those preparing to enter the life of grace through Baptism. In many parish vessels it may be marked OC or OS, depending on local labeling custom. Its use points to strengthening and preparation as the person approaches the sacrament.
This oil is especially visible in the Christian initiation of adults and in infant Baptism. It reminds the parish that Baptism is not treated casually; it is a passage into Christ and the Church. The Oil of Catechumens belongs to that preparation, helping the rite express the Church’s prayer for the person who is about to be baptized.
Proper identification is important because the Oil of Catechumens can sit near other vessels of similar size. Labels should be readable, consistent, and checked before any liturgy. A small mistake in preparation can create confusion during a sacramental celebration, so careful setup is part of reverent ministry.
The Oil of the Sick serves pastoral care
The Oil of the Sick, traditionally connected with the Latin phrase oleum infirmorum, is commonly marked OI. It is used in the Anointing of the Sick, a sacrament of the Church for those facing serious illness, frailty, or other conditions recognized in pastoral practice. The sacrament is not a mere symbol of concern; it is a liturgical act of prayer and grace entrusted to priests.
Because priests may need the Oil of the Sick outside the church building, it is often carried in a small oil stock for sick calls. A priest may keep a properly sealed, clearly marked vessel in a sick call set or another suitable container used for pastoral visits. This allows him to bring the sacrament reverently to homes, hospitals, care facilities, and other places where the faithful may need ministry.
Parishes should make sure the oil used for sick calls is fresh, correctly identified, and protected from spills. If cotton is used inside a small oil stock to absorb and hold the oil, it should be treated as a sacred item once used and handled according to parish or diocesan practice.
What happens at the Chrism Mass during Holy Week?
The Chrism Mass takes place during Holy Week, when the bishop blesses the oils and consecrates the Chrism together with the priests of the diocese. This liturgy expresses the unity of the local Church around its bishop and the shared ministry of the priests who will use these oils in parishes, chapels, hospitals, and other pastoral settings.
At the Chrism Mass, the Oil of the Sick and the Oil of Catechumens are blessed, while Sacred Chrism is consecrated. The presence of the diocesan priests is meaningful because the oils will return with them, or through appointed parish representatives, to be used in the sacramental life of local communities.
After the Chrism Mass, parishes receive the newly blessed oils for the year. Many communities welcome them formally at the Mass of the Lord’s Supper or another suitable time, placing them in the ambry with reverence. This yearly renewal helps the parish see that the sacred oils are not private supplies but gifts entrusted through the Church’s liturgy.
Oil stocks and the ambry keep the oils identifiable and dignified
Holy oil stocks are small labeled vessels used to hold the sacred oils. They may be individual containers, a set of three vessels, or small portable vessels for specific ministry. Common markings include SC or SChr for Sacred Chrism, OC or OS for the Oil of Catechumens, and OI for oleum infirmorum, the Oil of the Sick.
The ambry is a dignified cabinet or niche where the holy oils are kept and may be displayed. It is often located near the baptistery, which makes sense because two of the oils are closely connected with Baptism and Christian initiation. In many churches, the ambry has a glass door or visible placement so the faithful can recognize the oils as part of the parish’s sacramental life.
Both oil stocks and the ambry should communicate reverence without distraction. They should be clean, secure, and suited to the worship space. A parish does not need unnecessary ornamentation, but it should avoid anything careless, damaged, or confusing in the way the oils are presented.
Practical care for sacred oils in the parish
Good care is simple, consistent, and documented. Parish staff, sacristans, clergy, and trained volunteers should know who handles the oils and what local diocesan practice requires. The goal is to keep the vessels clean, the oils correctly identified, and the ambry dignified.
A practical care routine may include:
- Use cotton carefully in oil stocks. Cotton may help hold oil in a small vessel, especially for portable use. Once it has absorbed a sacred oil, treat it reverently and do not discard it casually.
- Refill vessels with attention. Refill only from the proper container, and avoid mixing up the oils. Work slowly, wipe the vessel if needed, and return any larger container to its proper place.
- Check every label. Make sure SC or SChr, OC or OS, and OI labels are clear and remain attached or engraved where they can be read easily.
- Clean the vessels respectfully. Remove residue from the outside of vessels and keep threads, lids, and interiors in good condition. Follow parish procedure if a vessel needs deeper cleaning.
- Maintain the ambry. Keep the ambry clean, locked, and orderly. Its surroundings should support prayer and dignity rather than become a storage area for unrelated items.
- Limit handling. Only those assigned to prepare or use the oils should open the vessels or move them. This reduces confusion and helps preserve a reverent routine.
These small habits matter. They help the parish avoid hurried decisions before a liturgy and make it easier for clergy and ministers to focus on the rite itself.
How are the previous year’s oils reverently disposed of?
After parishes receive new oils following the Chrism Mass, the previous year’s oils are disposed of reverently according to diocesan practice. Common methods include burning the remaining oil, absorbing it in cotton and then burning the cotton, or pouring it into the earth in a suitable place.
The exact procedure should follow the direction of the diocese or pastor. Some parishes coordinate this as part of Holy Week preparation, while others assign it to the sacristan or clergy member responsible for sacred vessels. What matters is that the oils are not treated like ordinary waste.
This yearly transition is also a good moment to inspect the oil stocks and the ambry. Labels can be checked, vessels can be cleaned, and the parish can confirm that everything is ready for the new oils. A short annual checklist prevents small issues from becoming liturgical distractions.
A simple parish checklist for the sacred oils
A clear checklist helps parishes care for the three holy oils with consistency from year to year.
- Confirm who will receive the new oils after the Chrism Mass.
- Verify that each vessel is labeled correctly: SC or SChr, OC or OS, and OI.
- Clean oil stocks before placing newly blessed oils in them.
- Follow diocesan practice for the previous year’s oils.
- Place the oils in the ambry with dignity.
- Keep the ambry locked when appropriate and limit access to assigned persons.
- Review procedures for sick calls so the priest has the Oil of the Sick ready in a suitable portable vessel.
- Revisit the routine annually during Holy Week preparation.
When this care becomes part of parish rhythm, the holy oils remain visible signs of faith rather than items people notice only when something is missing.
The sacred oils point to the Church’s living prayer
The sacred oils accompany Catholics at some of the most important moments of Christian life: initiation, strengthening, ordination, dedication, and pastoral care in illness. They connect the local parish to the bishop, the priests of the diocese, and the wider worship of the Church. Caring for them well is a quiet but meaningful service.
For parishes preparing their liturgical space, see the polished brass holy oil stock set of 3 in case and the Holy Cross ambry display cabinet at CFaithS.
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