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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 …

PERIODIC TABLE OF ELEMENTSChemical Group Block 18

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 …

Cocaine is a tropane alkaloid obtained from leaves of the South American shrub Erythroxylon coca. It has a role as a local anaesthetic, a central nervous system stimulant, a sodium …

Polydimethylsiloxanes chemical information summary.Please enable Javascript in order to use PubChem website.

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 …

PubChem has summary pages specific to chemical elements, and a periodic table.

PERIODIC TABLE OF ELEMENTS

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