Iron ring (laboratory)

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Iron rings used in a laboratory

An iron ring or ring clamp is an item of laboratory equipment which comprises a conjoined metal ring and radially-extending rod.[1] In some cases, the rod terminates in a screw clamp for attachment to a retort stand or other support; in others, the rod may be attached to a stand by means of a laboratory clamp holder.[2] Iron rings are commonly used in chemistry laboratories for supporting apparatus above the work surface, for example:

In some cases, a slot is cut in the side of the ring opposite the rod. This is to allow a funnel to be placed upon and removed from the ring from the side rather than from above, a safer procedure.


  1. ^ a b c "Tutorial on Supports". Archived from the original on March 4, 2016. Retrieved December 17, 2014.
  2. ^ "Holder". Retrieved December 17, 2014.