HMDS

HMDS may refer to:

• either of two related reagents in organometallic chemistry:
  • Hexamethyldisilazane ([(CH₃)₃Si]₂NH)
  • Hexamethyldisilazide ([(CH₃)₃Si]₂NM)
    • M = Li as in Lithium bis(trimethylsilyl)amide (LiHMDS)
    • M = Na as in Sodium bis(trimethylsilyl)amide (NaHMDS)
    • M = K as in Potassium bis(trimethylsilyl)amide (KHMDS)
• Hexamethyldisiloxane (O[Si(CH₃)₃]₂)
• Her Majesty's Diplomatic Service, of the United Kingdom
• Helmet mounted display and sight, a system for military pilots
• Harvest Moon DS, a video game

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