beauty
cleaning
food
industrial

Calcium oxide

CAS 12610-14-9 · 40/100 · High conf.

Also registered as 8 other CAS numbers

60873-85-0 · 104624-96-6 · 245321-52-2 · 2529596-16-3 · 2641773-61-5 · 2721380-79-4 · 2982928-23-2 · 1305-78-8

Concern score

40/100Moderate concern based on regulatory listings.

High confidence

Calcium oxide in plain language

What it is: Also known as Lime · Lime (calcium oxide) · Calciumoxide · Burnt lime · Calx · Lime (cao)
Show all 25 names
Lime (chemical) · Quicklime · calcium oxygen(2-) · AKOS032949954 · Airlock · Bell CML 41 · Bell CML(E) · Bell CML(P) · Borumikku · CaO · Calcium Oxide Nanoparticle Dispersion · Calcium oxide (CaO) · DB-318891 · E-529 · Ins NO.529 · INS-529 · calcium oxid · calcium oxide/autoclaved lime · calcium;oxygen(2-)
What it does: Used in cosmetics as a pH buffer.
Buffering
Yeast food, acidity regulator, flour treatment agent
pH adjuster
Stabiliser
Is it a concern?: Moderate concern: no hazard classifications on record. It is listed for cosmetic use in the EU.

Why it's flagged

EPA CPDat observed this chemical in 1594 composition records across product categories including Construction and building materials, Furniture and furnishings, Raw materials.

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Calcium oxide appears in these published regulatory listings.

Inactive ingredient in US drugs

Recorded in these product areas

Found in consumer products
Beauty
Cleaning
Industrial

USFDAinactive ingredient database2 entries
- Route: ORAL; Dosage form: SOLUTION, CONCENTRATE; Potency: 0.1 ml/1mlSource →
- Route: ORAL; Dosage form: CAPSULE; Potency: NASource →
EUCosIngActiveListed in CosIng inventory for cosmetic use.
- Listed in CosIng inventory for cosmetic use.Source →
GLOBALJECFANOT LIMITEDJECFA evaluation lists ADI NOT LIMITED. Functional class: yeast food, acidity regulator, flour treatment agent.
- JECFA evaluation lists ADI NOT LIMITED. Functional class: yeast food, acidity regulator, flour treatment agent.Source →
GLOBALJECFAEvaluatedJECFA evaluation record.
- JECFA evaluation record.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 1594 composition records across product categories including Construction and building materials, Furniture and furnishings, Raw materials. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Stabilizing agent, aggregate.
- EPA CPDat observed this chemical in 1594 composition records across product categories including Construction and building materials, Furniture and furnishings, Raw materials. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Stabilizing agent, aggregate.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.
JECFA
Joint FAO/WHO Expert Committee on Food Additives
- JECFA evaluation lists ADI NOT LIMITED. Functional class: yeast food, acidity regulator, flour treatment agent.
  Year not recorded · GLOBAL JECFA listing · Read the source →
- JECFA evaluation record.
  Year not recorded · GLOBAL JECFA listing · Read the source →

Evidence & sources

No graded research studies for Calcium oxide yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

8 data sources

Where this comes from

CosIng
regulatory · updated 2026-09-23
Open →
EPA Chemical and Products Database
exposure · updated march 23, 2017
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
Open →
FDA Inactive Ingredient Database
regulatory · updated 2026-01-09
Open →
FDA GSRS UNII
registry · updated 2026-02-26
Open →
WHO JECFA Database
regulatory · updated 2026-10-04
Open →
openFDA Substance
registry · updated 2026-05-24
Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Open →

Reference links (2)

Openfda substance

codexalimentarius.net

Read →

Openfda substance

jtbaker.com

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Calcium oxide in a product composition. These are source records, not Greenveil catalog products.

Source records

1,594

Named organisations

Construction and building materialsFurniture and furnishingsRaw materialsHome maintenanceLaboratory suppliesCleaning products and household care

Typical roles

BufferingYeast food, acidity regulator, flour treatment agentpH adjusterStabiliser

See products using Calcium oxide →

Catalog

Found in these products

Their ingredient lists include Calcium oxide; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 1000+ →Find products without it →

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Calcium oxide in the catalog.