All bibliometric data used to calculate the citation-based metrics underpinning this ranking were collected on January 12, 2026. The position of each scientist in the ranking is determined based on their D-index (Discipline H-index), a refined metric that accounts specifically for a researcher’s output and impact within a defined discipline—Chemistry in this case—by exclusively including papers and citations relevant to that field.
Scope of Research and Qualification Criteria
The creation of this ranking started with the examination of 279,971 scientist profiles across all disciplines, compiled from a wide array of bibliometric sources. Within this broad dataset, 31 scientists specializing in Chemistry in Thailand were identified and evaluated.
To qualify for inclusion, each scientist’s D-index had to meet a minimum threshold of 40, and a majority of their top-tier publications were required to be in the field of Chemistry. Beyond bibliometric thresholds, scientists’ awards and achievements specific to Chemistry were also taken into account, ensuring recognition of distinguished contributions within the discipline.
The threshold for D-index consideration is set in increments of 10, calibrated according to the estimated overall number of scholars within each discipline. This approach ensures that the top 1% of leading researchers are incorporated in the ranking while maintaining rigor in the selection process. Additionally, to ensure the disciplinary specificity of the ranking, there is a required proximity of 30% or less between a researcher’s general H-index and their D-index, reinforcing that the researcher’s influence is predominantly centered on Chemistry.
Verification Practices and Additional Metrics
Recognizing that raw bibliometric data alone are insufficient to fully capture the scholarly impact and quality of researchers, the team behind this ranking has implemented extensive manual verification processes. All scientist profiles were carefully cross-verified against publications indexed in numerous reputable and trustworthy sources, thereby minimizing errors in attribution and reinforcing the accuracy of this ranking.
Although not directly influencing a researcher’s position in the Research.com rankings, the number of papers published in prominent journals and distinguished conference proceedings was also reviewed as a valuable secondary indicator of a scholar’s contributions within their specific area of Chemistry research.
The final ranking positions are established using each researcher’s D-index, derived from the reliable citation and publication data obtained from OpenAlex and CrossRef databases. These sources are widely recognized for their comprehensive coverage and ongoing commitment to transparency, enhancing the credibility of the ranking.
For a thorough understanding of the detailed methodology employed, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission in producing the Best Chemistry Scientists in Thailand Ranking—and our broader portfolio of rankings—is to motivate researchers, industry leaders, and policymakers worldwide to strategically observe the directions taken by leading experts. By fostering transparency and visibility, we aim to provide the entire scientific community with reliable, data-driven insights into who the foremost scholars are in specific disciplines, across countries, and within academic institutions.
We believe that this knowledge facilitates more informed decisions about collaboration, funding, and talent development, ultimately advancing the progress of science. The meticulous care and rigor applied throughout the ranking’s creation underscore our commitment to supporting a global research ecosystem that recognizes and encourages excellence.
