Hefei Kejing High-Purity Chemical Reagents
| Brand | Hefei Kejing |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | High-Purity Chemical Reagents |
| Pricing | Upon Request |
| Purity Grades | 3N to 5N (99.9% to 99.999%) |
Overview
Hefei Kejing High-Purity Chemical Reagents are engineered for demanding applications in advanced materials synthesis, thin-film deposition, crystal growth, and target fabrication. These reagents meet stringent purity specifications—ranging from 3N (99.9%) to 5N (99.999%)—and are rigorously quality-controlled to minimize trace metallic impurities (e.g., Fe, Cu, Ni, Cr) and non-metallic contaminants (e.g., Cl⁻, SO₄²⁻, H₂O). Each batch is accompanied by a Certificate of Analysis (CoA) specifying elemental impurity profiles via ICP-MS or GDMS, total carbon content (by LECO), and moisture content (by Karl Fischer titration). Designed for reproducible stoichiometry in solid-state reactions, these reagents support the preparation of high-performance oxides, nitrides, perovskites, and rare-earth doped ceramics under controlled thermal and atmospheric conditions.
Key Features
- Multi-grade purity portfolio: 3N (99.9%), 4N (99.99%), and 5N (99.999%) grades available for tailored process requirements
- Comprehensive catalog covering rare-earth oxides (e.g., Yb₂O₃, Er₂O₃, Lu₂O₃), transition metal oxides (e.g., NiO, CuO, MnO₂), alkaline earth carbonates (e.g., BaCO₃, CaCO₃), and specialty compounds (e.g., Sc₂O₃, Ta₂O₅, V₂O₅)
- Controlled crystallinity and particle size distribution: Most oxides supplied as submicron powders (<1 µm D₅₀) with narrow PSD (span <1.5), optimized for homogeneous mixing and low-temperature sintering
- Traceability and documentation: Batch-specific CoA includes ICP-MS impurity screening (detection limit ≤0.1 ppm for most elements), oxygen/nitrogen/hydrogen analysis (ONH), and residual solvent verification where applicable
- Stable packaging: Sealed under argon in double-layer HDPE/Al-laminate pouches with desiccant; certified for long-term storage stability (≤25 °C, RH <30%)
Sample Compatibility & Compliance
These reagents are compatible with standard laboratory workflows including solid-state reaction, sol-gel synthesis, co-precipitation, and physical vapor deposition precursor preparation. All materials comply with ISO 9001:2015 manufacturing protocols and are produced in cleanroom-class environments (ISO Class 7–8) to prevent particulate contamination. Documentation supports GLP and GMP-aligned research environments; CoAs are structured to facilitate audit readiness for academic, industrial, and regulatory submissions (e.g., USP , ASTM E2927, ISO/IEC 17025). Trace element data aligns with semiconductor-grade reference standards (SEMI F57) for critical applications requiring ultra-low contamination thresholds.
Software & Data Management
While no embedded software is associated with chemical reagents, Hefei Kejing provides digital access to full material documentation via secure client portal. Users receive downloadable CoAs in PDF/A-1b format with embedded metadata (batch ID, production date, analytical methods, instrument calibration status). Integration-ready CSV exports of impurity data enable direct import into LIMS platforms (e.g., LabWare, Thermo Fisher SampleManager) and statistical process control (SPC) tools. Version-controlled documentation adheres to FDA 21 CFR Part 11 principles for electronic records—audit trails, user authentication, and electronic signatures are supported upon request for regulated users.
Applications
- Preparation of sputtering and evaporation targets for optical coatings, ferroelectric films, and superconducting layers
- Single-crystal growth via Czochralski, flux, or floating-zone methods—particularly for garnets, perovskites, and spinels
- Synthesis of phosphors (e.g., YAG:Ce, LuAG:Pr), upconversion nanoparticles, and magneto-optical ceramics
- Calibration standards for XRF, XRD quantitative phase analysis, and Raman spectroscopy reference libraries
- Feedstock for atomic layer deposition (ALD) and metal-organic chemical vapor deposition (MOCVD) precursor development
FAQ
Are certificates of analysis (CoA) provided with every shipment?
Yes—each batch includes a signed CoA detailing purity grade, impurity profile (ICP-MS), moisture content, particle size distribution, and method validation references.
Can custom purity grades or packaging formats be requested?
Yes—custom 5N+ grades, vacuum-sealed ampoules, or pre-weighed aliquots are available under NDA and subject to minimum order quantities.
Do you supply reagents compliant with RoHS or REACH regulations?
All listed reagents are inherently RoHS-compliant (no restricted substances above threshold); REACH SVHC screening is included in standard CoA for EU shipments.
What is the typical shelf life under recommended storage conditions?
24 months from date of manufacture when stored sealed under inert gas at ≤25 °C and relative humidity <30%; CoA reports initial stability testing per ICH Q1A(R2).
Is technical support available for formulation troubleshooting?
Yes—application engineers provide free pre-sales consultation on stoichiometric balancing, decomposition behavior, and atmosphere selection for calcination processes.
