Molekula
Calcium carbonate, ACS Grade
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 carbonate, ACS Grade, is a high-purity, white crystalline powder primarily used as a buffering agent, pH regulator, and analytical reagent in laboratories. Beyond the laboratory, calcium carbonate is widely used as a filler in plastics, a raw material for cement and glass manufacturing, and in copper and lead smelting. It meets the stringent requirements of the American Chemical Society for consistency and reliability in research and testing applications. This product has a CAS number of 471-34-1, with the molecular formula CaCO3 and a molecular weight of 100.09. It is stored at ambient conditions and carries no signal word for hazard classification. Molekula supplies Calcium Carbonate, ACS Grade 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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1 kg — £42.00 per pack ex VAT · £50.40 inc. VAT
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/ off white crystalline powder |
| Identification | Conforms to reference |
| Loss on Drying | ≤ 2.0% |
| Chloride (Cl-) | ≤ 0.033% |
| Assay | 98.5 - 100.5% |
| Bulk density | ca. 2.7 g/ml |
| Cadmium (Cd) | ≤ 0.00005% |
| Iron (Fe) | ≤ 0.02% |
| Lead (Pb) | ≤ 0.002% |
| Mercury (Hg) | ≤ 0.00005% |
| Arsenic (As) | ≤ 0.00015% |
| Insoluble matter in acid | ≤ 0.2% |
| Sulphates (SO4)(2-) | ≤ 0.25% |
| Magnesium and Alkali salts | ≤ 1.0% |
| Fluoride (F-) | ≤ 0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Odour | Odorless |
| Solubility (other solvents) | Practically insoluble in water; soluble in dilute acids |
| Vapour Pressure | 0 mmHg (approx) |
| Refractive Index | 1.7216 |
Source: PubChem CID 10112 (HSDB, The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 90025393 |
| CAS Number | 471-34-1 |
| IUPAC Name | calcium carbonate |
| EC Number | 207-439-9 |
| Molecular Formula | CaCO3 |
| Molecular Weight | 100.09 |
| Exact Mass | 99.9473 |
| SMILES | C(=O)([O-])[O-].[Ca+2] |
| InChIKey | VTYYLEPIZMXCLO-UHFFFAOYSA-L |
| InChI | InChI=1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2 |
| PubChem CID | 10112 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2836500000 |
| Tariff Code | 2836500000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
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
No alternate names recorded for this product.
Frequently asked questions
What is calcium carbonate (ACS Grade) commonly used for in laboratories?
ACS Grade calcium carbonate is primarily used as a primary standard for acid-base titrations, a buffer in analytical chemistry, and as a reagent in various chemical reactions requiring high purity.
What is the chemical formula and molecular weight of calcium carbonate?
The chemical formula is **CaCO₃**, and the molecular weight is **100.09 g/mol**.
How should calcium carbonate (ACS Grade) be stored?
Store in a cool, dry place at ambient temperature, tightly sealed to prevent moisture absorption.
What purity grade is available for calcium carbonate from Molekula?
Molekula supplies calcium carbonate in **ACS Grade**, meeting high-purity requirements for analytical and laboratory use.
Can Molekula supply calcium carbonate in bulk quantities?
Yes, bulk quantities of calcium carbonate (ACS Grade) are available upon request—contact our sales team for custom packaging options.
What documentation is provided with an order of calcium carbonate (ACS Grade)?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation verifying ACS compliance.
What is it used for?
Calcium carbonate is used as a filler in plastics, as a raw material in cement production and glass manufacturing, and in metal extraction and refining processes such as copper and lead smelting. It also serves as a fertilizer and a food firming agent.
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.