Product Description
Calcium carbonate naturally occurs as limestone in various forms, including marble, chalk, and coral. It is one of the most widely used raw materials in the chemical industry, with extensive applications in the production of cement, mortars, plasters, refractories, and glass for building materials. It is also utilized to manufacture quicklime, hydrated lime, and various calcium compounds.
Calcium carbonate is available in two main types: powdered and precipitated. Precipitated calcium carbonate features finer particles with higher purity and uniform size, making it suitable for a wide range of commercial applications. Different grades of precipitated calcium carbonate are used in products such as textiles, paper, paints, plastics, adhesives, sealants, and cosmetics.
It exists in two crystalline forms: hexagonal calcite and orthorhombic aragonite. Calcite decomposes at 825°C, while aragonite melts at 1,339°C (at 102.5 atm). Their densities are 2.71 g/cm³ (calcite) and 2.83 g/cm³ (aragonite). Calcium carbonate is insoluble in water (15 mg/L at 25°C) but soluble in dilute mineral acids.
As a naturally occurring compound, calcium carbonate is widely found in organisms and throughout the earth’s crust. After quartz, it is the most abundant mineral, primarily in the form of calcite. Geologically, calcium carbonate occurs in several mineral forms, including calcite, aragonite, and the rare vaterite. The crystalline structure of calcium carbonate varies depending on formation conditions such as temperature and pressure.
Properties
| Melting point | 825 °C |
| Boiling point | 800 °C |
| 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 |
| PH | 9.91(1 mM solution);9.91(10 mM solution);9.91(100 mM solution); |
| Odor | Odorless |
| PH Range | 8 |
| Water Solubility | Insoluble |
| λmax | λ: 260 nm Amax: ≤0.09 |
| λ: 280 nm Amax: ≤0.06 | |
| Merck | 141657 |
| BRN | 8008338 |
| Solubility Product Constant (Ksp) | pKsp: 8.54 |
| Exposure limits | NIOSH: TWA 10 mg/m3; TWA 5 mg/m3 |
| Dielectric constant | 6.1（Ambient） |
| Stability: | Stable. Incompatible with acids, fluorine, ammonium salts, alum. |
| InChIKey | VTYYLEPIZMXCLO-UHFFFAOYSA-L |
| 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 | Yes |
| HS Code | 28365000 |
| Hazardous Substances Data | 471-34-1(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 6450 mg/kg LD50 dermal Rat > 2000 mg/kg |
Factory Tour
Package And Shipping
Company Profile
Shandong Rongsheng Chemical Co., Ltd. is located within a key chemical industrial cluster in Shandong Province. As an integrated chemical enterprise that unites production capability, technical research‑and‑development, domestic sales and cross‑border export, we are dedicated to supplying basic chemical feedstocks as well as high‑performance functional fine‑chemical additives. Our product array covers diverse downstream industrial sectors, such as rubber‑plastic processing, coatings and ink manufacturing, waste water treatment and numerous other industrial processing applications.
We are equipped with self‑operated standardized production facilities to conduct strict full‑process quality control and offer genuine factory‑direct supplies. By eliminating redundant intermediate links, we provide global buyers with flexible procurement alternatives, including large‑tonnage bulk shipments, custom formula development, individualized packaging requirements and small‑batch sample provision. Our adjustable production capacity satisfies diversified customer demands and ensures stable and timely deliveries.
Our professional international sales team possesses solid hands‑on experience in worldwide chemical trade. Being well‑versed in import regulations and cross‑border logistics arrangements across different nations and regions, we deliver complete one‑stop export services for overseas clients. Our service scope involves inquiry reception, sample dispatching, customized solution design, customs clearance, cargo coordination and continuous after‑sales support.
We adhere to our core business principle: quality‑driven operation and integrity‑rooted win‑win partnership. Supported by consistent product performance, flexible service modes and high‑efficiency shipping resources complying with relevant regulations, we provide cost‑effective and reliable comprehensive chemical supply‑chain solutions for customers across the globe. We aim to develop long‑lasting cooperative ties and become your dependable supplier in the global fine‑chemical industry.
