Molekula
Calcium oxide
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Calcium oxide, also known as quicklime, is a highly reactive alkaline compound widely used in steel production, water treatment, chemical manufacturing, and as a soil conditioner. It acts as a drying agent, pH regulator, and reactant in various industrial processes. This chemical has a CAS number of 1305-78-8, with the molecular formula CaO and a molecular weight of 56.08 g/mol. It requires ambient storage conditions and carries a **Danger** signal word due to its corrosive and hazardous nature. Molekula supplies calcium oxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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50 g — $79.80 per pack
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100 g — $147.40 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | white to off white powder |
| Assay | ≥90% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 0 °C |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Grey-white, cubic crystals |
| Odour | Odorless |
| Melting Point | 2613 °C |
| Boiling Point | 2850 °C |
| Density | 3.3-3.4 (relative, water = 1) |
| Solubility (other solvents) | Soluble in acids, glycerol, sugar solution; practically insoluble in alcohol |
| Vapour Pressure | 0 mmHg (approx) |
Source: PubChem CID 14778 (HSDB, ICSC, The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 11839289 |
| CAS Number | 1305-78-8 |
| IUPAC Name | oxocalcium |
| EC Number | 215-138-9 |
| Molecular Formula | CaO |
| Molecular Weight | 56.08 |
| Exact Mass | 55.9575 |
| SMILES | O=[Ca] |
| InChIKey | ODINCKMPIJJUCX-UHFFFAOYSA-N |
| InChI | InChI=1S/Ca.O |
| PubChem CID | 14778 |
| UN Number | UN1910 |
| REACH Code | Y110 |
| HTS Code | 2825.90.9000 |
| Tariff Code | 2825901900 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Airlock
- Calcia
- Calcium monoxide
- CALX
- Calx usta
- Calxyl
- Chaux vive
- Gebrannter kalk
- Quick lime
- Unslaked lime
Frequently asked questions
What is calcium oxide primarily used for?
Calcium oxide (quicklime) is commonly used in steel production, water treatment, chemical manufacturing, and as a soil conditioner in agriculture.
What is the chemical formula and molecular weight of calcium oxide?
The chemical formula is **CaO**, and the molecular weight is **56.08 g/mol**.
How should calcium oxide be stored?
Store in a **dry, well-ventilated area** at ambient temperature, away from moisture and incompatible substances.
What grades of calcium oxide does Molekula supply?
Molekula supplies **technical-grade calcium oxide** suitable for industrial applications; purity and specifications can be confirmed upon inquiry.
Can Molekula supply calcium oxide in bulk quantities?
Yes, we offer **bulk packaging options** (e.g., 25 kg bags, 1-tonne supersacks) for large-scale industrial requirements—contact us for availability.
What documentation is provided with a calcium oxide order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and compliance documentation (e.g., REACH) upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.