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pubchem.ncbi.nlm.nih.gov

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.

chemspider.com

a free chemical structure database providing fast text and structure search access to over 130 million structures from hundreds of data sources.

guidechem.com

Guidechem HOT RFQ for the 1st week of April 2026 highlights trending global chemical purchase requests, helping buyers find demand and suppliers capture timely opportunities across Asia, Europe, America, Africa and more.

tcichemicals.com

tci is a global manufacturer of chemicals for research and development, with reagents for chemistry, life science, materials science, and analytical chemistry.

chemsrc.com

Chemsrc provides 3-Indoleacetic acid(CAS#:87-51-4) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of 3-Indoleacetic acid are included as well.

echemi.com

ECHEMI is a global chemical industry B2B website. You can find leading manufacturing companies, top suppliers & quality chemical products here. We help you complete chemical business in the world.

scbt.com

Santa Cruz Biotechnology Support Products includes a broad range of lysates, proteins, purification reagents, and more for research applications.

bldpharm.com

bldpharm provides a catalog over 600,000+ products, including building blocks, advanced intermediates, amino acids and peptides, catalysts and ligands, natural products, nucleotides, etc. over 1,000 novel chemicals are continually added into bld's product list on a monthly basis.

alfa-chemistry.com

provide the chemical, particularly the pharmaceutical industry,custom made intermediates, carbohydrates, heterocyclic, chiral compounds and fine chemicals,environmental remediation products.