Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, …

GHS, the Globally Harmonized System of Classification and Labeling of Chemicals, was developed by the United Nations as a way to bring into agreement the chemical regulations …

Acetaminophen (paracetamol), also commonly known as Tylenol, is the most commonly taken analgesic worldwide and is recommended as first-line therapy in pain conditions by the World …

Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots.

https://www.nist.gov/pml/database-disclaimer Zinc https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=30 IUPAC Periodic Table of the Elements and Isotopes …

An alkaloid ester extracted from the leaves of plants including coca. It is a local anesthetic and vasoconstrictor and is clinically used for that purpose, particularly in the eye, ear, nose, and …

Explore how density changes with atomic number in the periodic table of elements via interactive plots.

Explore how ionization energy changes with atomic number in the periodic table of elements via interactive plots.

PERIODIC TABLE OF ELEMENTS

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 …