Calcium carbonate, CAS#471-34-1
Calcium carbonate exists naturally in the form of limestone and appears in diverse natural variants including marble, chalk and coral. It ranks among the most versatile and extensively applied raw materials across the global chemical industry, boasting a broad spectrum of practical uses. In the construction sector, it serves as a core feedstock for manufacturing cement, mortars, plasters, refractory materials and architectural glass. Beyond building materials, it acts as an essential starting material for the production of quicklime, hydrated lime, and a wide range of downstream calcium-based chemical compounds.
This mineral filler is commercially supplied in two major forms: ground powdered calcium carbonate and precipitated calcium carbonate (PCC). Precipitated calcium carbonate features much finer particles, superior chemical purity, together with a far more consistent and controlled particle size distribution. Thanks to these outstanding physical properties, precipitated calcium carbonate enjoys substantial demand in numerous commercial fields. Multiple custom grades of PCC are formulated and incorporated into finished goods covering textiles, paper making, coatings & paints, plastic composites, adhesives, sealants and personal care cosmetics, helping to improve product whiteness, filling performance and processing stability.
| Calcium carbonate Chemical Properties |
| Melting point | 825 °C |
| Boiling point | 800 °C |
| bulk density | 300-1400kg/m3 |
| density | 2.93 g/mL at 25 °C (lit.) |
| refractive index | 1.6583 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 5 M HCl: 0.1 M at 20 °C, clear, colorless |
| form | random crystals |
| color | White-beige to slightly beige-gray |
| Specific Gravity | 2.93 |
| Flame Color | Red-orange |
| Odor | Odorless |
| PH | 9.91(1 mM solution);9.91(10 mM solution);9.91(100 mM solution); |
| PH Range | 8 |
| Water Solubility | Insoluble |
| λmax | λ: 260 nm Amax: ≤0.09 λ: 280 nm Amax: ≤0.06 |
| Merck | 14,1657 |
| Solubility Product Constant (Ksp) | pKsp: 8.54 |
| BRN | 8008338 |
| Dielectric constant | 6.1（Ambient） |
| Exposure limits | NIOSH: TWA 10 mg/m3; TWA 5 mg/m3 |
| Stability: | Stable. Incompatible with acids, fluorine, ammonium salts, alum. |
| Cosmetics Ingredients Functions | BULKING BUFFERING ABRASIVE ORAL CARE COLORANT OPACIFYING |
| Cosmetic Ingredient Review (CIR) | Calcium carbonate (471-34-1) |
| InChI | 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2 |
| InChIKey | VTYYLEPIZMXCLO-UHFFFAOYSA-L |
| SMILES | [Ca++].[O-]C([O-])=O |
| Modulus of Elasticity | 10.0 - 80.0 GPa |
| Hardness, Knoop | 75 - 120 |
| Hardness, Mohs | 2.0 - 5.0 |
| Hardness, Shore H | 10 - 60 |
| Hardness, Vickers | 105 - 136 |
| Drilling Hardness | 50 |
| CAS DataBase Reference | 471-34-1(CAS DataBase Reference) |
| EPA Substance Registry System | Calcium carbonate (471-34-1) |
| Safety Information |
| Hazard Codes | Xi |
| Risk Statements | 37/38-41-36/38-36 |
| Safety Statements | 26-36/37/39-37/39-37 |
| OEB | B |
| OEL | TWA: 10 mg/m3 (total) |
| WGK Germany | - |
| RTECS | FF9335000 |
| TSCA | TSCA listed |
| HS Code | 28365000 |
| Storage Class | 13 - Non Combustible Solids |
| Hazardous Substances Data | 471-34-1(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 6450 mg/kg LD50 dermal Rat > 2000 mg/kg |
H2: Product Application Of Calcium carbonate CAS#471-34-1
H3: Polishing & Surface Finishing Application
Calcium carbonate is used as a very mild abrasive for hand polishing nickel, gold, silver, or plated ware, buttons, and similar materials. Its soft particle characteristic avoids scratching delicate metal surfaces and decorative parts, delivering a smooth, glossy finish without damaging the base material. It is widely favored by craft workshops and jewelry processing factories for manual fine polishing work.
H3: Filler & Functional Additive Application
As an eco-friendly inorganic filler, precipitated calcium carbonate can boost the opacity and whiteness of end products while cutting overall production costs. It improves dimensional stability and surface smoothness of finished goods without bringing harmful chemical residues.
H3: Industrial & Daily Formula Application
It can be added into water-based coatings, putty compounds and sealant formulas to adjust rheology and sag resistance. It also works as a pH regulator and bulking agent for non-toxic, low-irritation formulations for personal care and household products.
H2: Product Advantages
H3: Stable Quality & Consistent Particle Size
Our calcium carbonate adopts controlled precipitation production technology. Every batch is tested for purity, whiteness and particle distribution before shipment. Stable indexes help customers keep consistent finished product quality and reduce reject rates.
H3: Low Abrasion & High Whiteness
Compared with other mineral abrasives and fillers, this product features moderate hardness and high brightness. It will not wear processing equipment excessively and can bring excellent covering and brightening effects.
H3: Non-toxic & Environment Friendly
This product complies with common international raw material safety standards. It contains no heavy metal additives, suitable for products that require low toxicity and environmental protection.
H2: Delivery Schedule
H3: Fast delivery time
Inventory goods: Ready for shipment within 2–3 working days after receiving your payment
Newly scheduled production order: Production cycle 7–10 working days
Note: The above cycle excludes international sea freight, customs clearance and remote logistics time. We will update production progress for you actively.
H2: Packaging & Transportation
H3: Standard Packaging Specification
Default packing: 25kg woven bag with inner PE liner, moisture-proof and dust-proof. Custom packaging options (500kg / 1000kg jumbo bag) are available upon customer request. We support printing your brand logo on bags.
H3: Shipping & Loading
We mainly ship goods by full container load (FCL). Our warehouse team arranges pallet loading and reinforcement to prevent package breakage during long-distance ocean transit. We can cooperate with your nominated forwarder or recommend reliable freight agents for you.
H3: Storage Reminder
Please store in a dry, ventilated warehouse, keep away from rain and high humidity environment. Sealing the packages after use will avoid agglomeration.
H2: After-sales Service
H3: Batch Document Support
We can provide COA (Certificate of Analysis), packing list, commercial invoice and other customs documents for each shipment as required.
H3: Quality Feedback Handling
If you have any quality doubts after receiving cargo, please provide photos and test reports within 7 working days after container arrival. Our technical team will follow up, verify and offer a proper solution quickly.
H3: Technical Support
Our technical team can offer usage suggestions, recommended adding dosage and matching advice for your production formula.
H2: Cooperation & Customer Reference
H3: Suitable Buyer Groups
We serve jewelry polishing factories, coating manufacturers, plastic compounding plants, adhesive & sealant producers, cosmetic raw material distributors and chemical trading companies worldwide.
H3: Customization Service
We support customized grades: adjust particle fineness and surface treatment according to your application requirements. Send us your index requirements, and we will arrange sample testing.
H2: FAQ
H3: Q: Can I get free samples before bulk order?
A: Yes, we can supply small test samples for your lab testing. Customers only need to bear the international courier freight cost.
H3: Q: What is your MOQ?
A: Our minimum order quantity is 1 FCL, as marked on our product specification sheet.
H3: Q: Is this calcium carbonate suitable for food grade formula?
A: This regular industrial grade is mainly for polishing, coating and industrial filling use. If you need food contact grade, please contact us separately for special quotation and specification.
H3: Q: Will the powder clump easily during shipping?
A: Our inner liner packaging is moisture-proof. Under normal sea transportation, caking will not happen if containers keep dry.
