Description
Specifications Table
Product Name – Calcium carbonate, Puratronic™, 99.997% (metals basis)
Quantity/Pack Size – 500g, 100g, 25g, 5g
Form – Powder
Grade – Puratronic™ (99.997% metals basis)
Application – Semiconductor, thin-film deposition, analytical standards, high-purity synthesis
Product Overview
This Puratronic™-grade calcium carbonate delivers exceptional purity at 99.997% (metals basis), engineered for applications where trace metal contamination is critical. The ultra-low impurity profile ensures reliable performance in semiconductor manufacturing, thin-film deposition, and advanced material synthesis where even ppb-level contaminants can compromise results. Unlike technical or reagent grades, this material undergoes rigorous purification to eliminate transition metals (Fe, Cu, Ni, Cr) and alkali/alkaline earth metals (Na, K, Mg, Ca), which are common interferents in high-sensitivity processes. The fine, free-flowing powder form enables homogeneous dispersion in solvents or matrices without agglomeration, while the tightly controlled particle size distribution enhances reproducibility in deposition or doping applications. Packaged under inert conditions to prevent moisture absorption or atmospheric contamination, it arrives with a certificate of analysis detailing ICP-MS/AA verification of its ultra-high purity. Compatible with most organic and aqueous systems, it dissolves completely in acidic media without residual insolubles, making it ideal for precursor solutions in CVD/ALD processes or as a calibration standard for elemental analysis.
FAQs
1. What is the difference between Puratronic™ and reagent-grade calcium carbonate?
Puratronic™ grade undergoes additional purification steps to achieve 99.997% metals basis purity, with strict limits on individual trace metals (typically <10 ppm for most elements). Reagent-grade materials usually specify 99% purity with higher allowable impurities, which can interfere with sensitive applications.
2. Can this product be used for thin-film deposition without further purification?
Yes, the ultra-low metal content (e.g., <1 ppm Fe, <0.5 ppm Cu) makes it suitable for direct use in PVD, CVD, or ALD processes where metal contamination would degrade film properties. However, always verify compatibility with your specific deposition parameters.
3. How should I store this material to maintain its purity?
Store unopened containers in a desiccator or sealed under dry nitrogen/inert gas. After opening, reseal immediately and avoid exposure to humidity or CO₂, which can form surface carbonates or hydrates. For long-term storage, keep at 15–25°C in a dedicated low-humidity cabinet.
4. Is this calcium carbonate compatible with halogenated solvents like dichloromethane?
It is chemically stable in halogenated solvents, but its solubility is negligible in non-polar media. For precursor applications, dissolve it first in a polar solvent (e.g., dilute HCl or acetic acid) before mixing with organic phases to ensure complete dispersion.
5. What alternatives exist if I need even lower sodium or potassium content?
For applications requiring <0.1 ppm alkali metals, consider our 99.999% (5N) calcium carbonate or opt for a custom purification service. Alternatively, calcium acetate or calcium hydroxide (Puratronic™ grade) may offer lower alkali levels depending on your process requirements.
