SH

SH, Sh, sH or sh may refer to:

• Saint Helena Island ISO 3166 digram and FIPS PUB 10-4 territory code
  • .sh, the country code top-level domain (ccTLD) of Saint Helena
• Schleswig-Holstein, Germany
• Shanghai, China
• Canton of Schaffhausen, Switzerland

.sh is the Internet country code top-level domain (ccTLD) for Saint Helena, Ascension and Tristan da Cunha, British Overseas Territories. Registrations of internationalized domain names are also accepted.

Sh! may refer to:

• Sh! is an abbreviation of Sh! Women's Erotic Emporium
• SH! is an abbreviation of Sledge Hammer!

In organic chemistry, a thiol (, ) is an organosulfur compound that contains a carbon-bonded sulfhydryl (–C–SH or R–SH) group (where R represents an alkane, alkene, or other carbon-containing group of atoms). Thiols are the sulfur analogue of alcohols (that is, sulfur takes the place of oxygen in the hydroxyl group of an alcohol), and the word is a portmanteau of "thion" + "alcohol," with the first word deriving from Greek θεῖον ("thion") = "sulfur." The –SH functional group itself is referred to as either a thiol group or a sulfhydryl group.