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, …

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 …

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

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 …

Triclosan is an aromatic ether that is phenol which is substituted at C-5 by a chloro group and at C-2 by a 2,4-dichlorophenoxy group. It is widely used as a preservative and antimicrobial …

Docs Data Organization Elements While PubChem provides pages per chemical, one can find elements there too. Such pages are not suited for displaying information specific to elements …

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 …

Tetrodotoxin is a neurotoxin with potential analgesic activity. Tetrodotoxin binds to the pores of fast voltage-gated fast sodium channels in nerve cell membranes, inhibiting nerve action …

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

PERIODIC TABLE OF ELEMENTSElectronegativity 18